Circuit Protection

Transcription

Circuit Protection

Circuit Protection
Series L8 Supplementary Protectors - General Description......................M2
Selection Guide - Trip Curve "B".............................................................M4
Selection Guide - Trip Curve "C".............................................................M6
Selection Guide - Trip Curve "D".............................................................M8
Accessories..........................................................................................M10
Technical Information............................................................................M12
Dimensions...........................................................................................M17
Series L9 Miniature Circuit Breakers - General Description....................M18
Selection Guide - Trip Curve "C"...........................................................M20
Selection Guide - Trip Curve "D"...........................................................M21
Accessories..........................................................................................M22
Technical Information............................................................................M24
Dimensions...........................................................................................M25
Methods Of Applying Circuit Protection.................................................M29
Applying L8 Supplementary Protectors with UL and NEC Guidelines......M31
Applying L9 Miniature Circuit Breakers with UL and NEC Guidelines......M32
Defining Electrical Standards................................................................M36
Series FH8 DIN-rail Mountable Fuse Holders.........................................M37
SSNA9000
Circuit
Protection
M
M1
Series L8
Supplementary
Protectors
Sprecher+Schuh Series L8 Supplementary Protectors provide supplemental
overcurrent protection for control
circuits, solenoids, actuators, appliances, business equipment and a range
of other applications where a high
performance current limiting device is
required. Advanced features and global
approvals make them ideal for use in
equipment installed throughout the
world.
Supplemental short
circuit protection for a
variety of applications
Broad product range
Series L8 Supplementary Protectors are
available in up to 20 different current
ratings from 0.5A to 63A, in one, two
and three pole configurations. Over
180 base models are available with a
full compliment of accessories.
Devices can be used in applications up
to 480V AC and 48V DC with interrupting capacities up to 10kA.
®
Safety features provide
enhanced protection
The terminals of Series L8 Supplementary Protectors provide IP20
protection to guard against accidental
contact with live parts.
To aid troubleshooting, a color-coded
indicator provides positive visual indication of the device status (green for OFF,
red for ON) and isolation function.
Sprecher+Schuh Supplementary
Protectors also incorporate a trip-free
mechanism - ensuring that the device
operation cannot be defeated by holding the operator in the ON position.
Easy installation
Sprecher+Schuh Supplementary Protectors mount on a standard 35mm
DIN-rail. Wire terminals accept
multiple conductors, and bus bars can
be used to quickly distribute power
to many Supplementary Protectors
simultaneously. In addition, power to
the circuit breakers can be fed from
the line or load side.
Global approvals for worldwide acceptance
Series L8 Supplementary Protectors are UL Recognized for use in
the United States in accordance with
NFPA 79 (NEC, National Electrical
Code). The devices comply with UL
1077 and CSA 22.2 No.235, meeting
the requirements for supplementary
protectors intended for use as overcurrent protection where branch circuit
protection is not required, or is provided by another device such as a fuse
or molded case circuit breaker. These
Supplementary Protectors also comply
with IEC 60898 for use in commercial
and residential applications and are CE
marked.
17.5mm
35mm
52.5mm
One Pole
Two Pole
Three Pole
(≈11/16˝)
M2
(≈1-3/8˝)
(≈2-1/8˝)
SSNA9000
L8
Circuit
Protection
M
Three trip characteristics
Sprecher+Schuh L8 Supplementary
Protectors are also current limiting interrupting fault currents within one
half cycle. Current limiting devices
protect circuit components from damage by reducing the peak let-through
current which causes damaging
magnetic forces and let-through energy
which generates heat.
Compare these advanced features
Box lug terminals accept #18…#4
(1.0…25mm2) wire as standard
120
t [min]
60
20
10
5
2
1
Type “C” Characteristic
Developed primarily for applications with
moderate inrush currents such as lighting,
control circuits and coils, computers and
appliances. Instantaneous trip is five to
ten times the rated current of the Supplementary Protector (5~10 x In). The
higher instantaneous trip level prevents
nuisance tripping, and components being
protected can typically withstand higher
fault currents without being damaged.
30
10
5
2
1
0.5
t [sec]
All Sprecher+Schuh L8 Supplementary Protectors are available with three
different tripping characteristics, Type
“B”, “C”, and “D”. The tripping characteristic defines the device’s speed of
response (trip-time) to various levels of
overcurrent. Figure 1 shows trip-time
versus overcurrent for Type B, C, and
D devices. The time-current characteristics enable the device to be optimally matched to the application. For
example, PLC outputs that can only
tolerate minimal overcurrents are best
protected by Supplementary Protectors
with Type B trip characteristics.
Type “B” Characteristic
Developed primarily to protect conductors
and low level signal devices such as PLCs.
Instantaneous trip is three to five times
the rated current of the Supplementary
Protector (3~5 x In). The fast trip time of
these devices minimizes damage to control
circuit conductors from low-level faults.
(Curves at 30º C)
0.2
0.1
0.05
0.02
0.01
0.005
0.002
0.001
0.0005
1
2
3
4
5 6 7 8 9 10
15
20
I / IN
Figure 1
Sprecher+Schuh Series L8
Supplementary Protector
Trip Characteristics
30
40 50
Type “D” Characteristic
Developed primarily for applications with
high inrush currents, i.e., transformers,
power supplies and heaters. Instantaneous
trip is ten to twenty times the rated current of the Supplementary Protector
(10~20 x In). The high instantaneous
trip level prevents nuisance tripping, and
components being protected can typically
withstand higher fault currents without
being damaged.
Line and load side terminals accept
bus bar connections for reduced
costs and more efficient installation
of multiple devices.
Guarded pozidrive terminal screws
with finger-safe protection to IEC
947-1
Ratings to 480Y/277V AC @
240/415V AC - 10kA Interrupt Rating
Magnetic trip elements provide
Type B, C and D trip characteristics
(IEC and EN 60898), while bimetallic
elements protect against slight
overloads.
Available in one, two and three pole;
one pole + neutral and three pole +
neutral
M
L8
SSNA9000
Amp rating and trip curve characteristic
clearly marked on the device for easy
identification
Color coded indicator provides visual
indication of the device status and
isolation function
Circuit
Protection
Devices install on standard
35mm DIN-rail (EN 50022)
Trip-free mechanism; device
operation cannot be defeated by
holding the operator in the ON
position
M3
L8 Supplementary Protectors
Trip Characteristic B
Trip Characteristic B (3~5 x IN) – Resistive or slightly inductive loads ➌
2 Pole ➋
1 Pole ➊
Rated
Current
(A)
Catalog Number
Price
Std.
Pkg. Catalog Number
3 Pole ➋
Price
Std.
Pkg. Catalog Number
Price
Std.
Pkg.
1
L8-1/1/B
38
12
L8-1/2/B
82
6
L8-1/3/B
124
4
2
L8-2/1/B
38
12
L8-2/2/B
82
6
L8-2/3/B
124
4
3
L8-3/1/B
38
12
L8-3/2/B
82
6
L8-3/3/B
124
4
4
L8-4/1/B
38
12
L8-4/2/B
82
6
L8-4/3/B
124
4
5
L8-5/1/B
38
12
L8-5/2/B
82
6
L8-5/3/B
124
4
6
L8-6/1/B
38
12
L8-6/2/B
82
6
L8-6/3/B
124
4
7
L8-7/1/B
38
12
L8-7/2/B
82
6
L8-7/3/B
124
4
8
L8-8/1/B
38
12
L8-8/2/B
82
6
L8-8/3/B
124
4
10
L8-10/1/B
38
12
L8-10/2/B
82
6
L8-10/3/B
124
4
13
L8-13/1/B
38
12
L8-13/2/B
82
6
L8-13/3/B
124
4
15
L8-15/1/B
38
12
L8-15/2/B
82
6
L8-15/3/B
124
4
16
L8-16/1/B
38
12
L8-16/2/B
82
6
L8-16/3/B
124
4
20
L8-20/1/B
40
12
L8-20/2/B
90
6
L8-20/3/B
137
4
25
L8-25/1/B
40
12
L8-25/2/B
90
6
L8-25/3/B
137
4
30
L8-30/1/B
40
12
L8-30/2/B
90
6
L8-30/3/B
137
4
32
L8-32/1/B
42
12
L8-32/2/B
99
6
L8-32/3/B
149
4
40
L8-40/1/B
44
12
L8-40/2/B
103
6
L8-40/3/B
155
4
50
L8-50/1/B
50
12
L8-50/2/B
118
6
L8-50/3/B
179
4
63
L8-63/1/B
59
12
L8-63/2/B
134
6
L8-63/3/B
204
4
L8 Supplementary Protector Features:
•UL-1077 Approved, CSA 22.2 No. 235 and IEC/EN 60898
•Thermal Magnetic Overcurrent Protection
•Trip characteristics based on 40ºC ambient for UL/CSA
•Up to 10kA interruption ratings
•Finger safe design
•DIN-rail mounting
SSNA9000
L8
Circuit
Protection
M
➊ 1-Pole ratings: UL/CSA 277VAC 48VDC, IEC 240/415VAC
➋ Multi-pole ratings: UL/CSA 480Y/277VAC 125VDC, IEC 415VAC
➌ See UL Short Circuit ratings U1/U2 in the technical data sections.
M4
Discount Schedule B-8
Trip Characteristic B
Trip Characteristic B (3~5 x IN) – Resistive or slightly inductive loads
1 Pole + Neutral
Rated
Current
(A)
Catalog Number
3 Pole + Neutral
Std.
Price Pkg. Catalog Number
Std.
Price Pkg.
1
L8-1/1N-2/B
65
6
L8-1/3N/B
149
3
2
L8-2/1N-2/B
65
6
L8-2/3N/B
149
3
4
L8-4/1N-2/B
65
6
L8-4/3N/B
149
3
6
L8-6/1N-2/B
65
6
L8-6/3N/B
149
3
8
L8-8/1N-2/B
65
6
L8-8/3N/B
149
3
10
L8-10/1N-2/B
65
6
L8-10/3N/B
149
3
13
L8-13/1N-2/B
65
6
L8-13/3N/B
149
3
16
L8-16/1N-2/B
65
6
L8-16/3N/B
149
3
20
L8-20/1N-2/B
78
6
L8-20/3N/B
174
3
25
L8-25/1N-2/B
78
6
L8-25/3N/B
174
3
32
L8-32/1N-2/B
78
6
L8-32/3N/B
174
3
40
L8-40/1N-2/B
78
6
L8-40/3N/B
174
3
50
L8-50/1N-2/B
99
8
L8-50/3N/B
227
3
63
L8-63/1N-2/B
107
8 L8-63/3N/B
252
3
All Supplementary Protectors + neutral are special order.
L8
SSNA9000
Circuit
Protection
M
M5
Trip Characteristic C
Trip Characteristic C (5~10 x IN) – Inductive loads ➌
2 Pole ➋
1 Pole ➊
Rated
Current
(A)
Catalog Number
0.5
L8-.5/1/C
Std.
44
12
L8-.5/2/C
3 Pole ➋
Std.
101
6
L8-.5/3/C
Std.
Price Pkg.
145
4
1
L8-1/1/C
44
12
L8-1/2/C
101
6
L8-1/3/C
145
4
2
L8-2/1/C
44
12
L8-2/2/C
101
6
L8-2/3/C
145
4
3
L8-3/1/C
44
12
L8-3/2/C
101
6
L8-3/3/C
145
4
4
L8-4/1/C
44
12
L8-4/2/C
101
6
L8-4/3/C
145
4
5
L8-5/1/C
44
12
L8-5/2/C
101
6
L8-5/3/C
145
4
6
L8-6/1/C
44
12
L8-6/2/C
101
6
L8-6/3/C
145
4
7
L8-7/1/C
44
12
L8-7/2/C
101
6
L8-7/3/C
145
4
8
L8-8/1/C
44
12
L8-8/2/C
101
6
L8-8/3/C
145
4
10
L8-10/1/C
44
12
L8-10/2/C
101
6
L8-10/3/C
145
4
13
L8-13/1/C
44
12
L8-13/2/C
101
6
L8-13/3/C
145
4
15
L8-15/1/C
44
12
L8-15/2/C
101
6
L8-15/3/C
145
4
16
L8-16/1/C
44
12
L8-16/2/C
101
6
L8-16/3/C
145
4
20
L8-20/1/C
44
12
L8-20/2/C
101
6
L8-20/3/C
145
4
25
L8-25/1/C
48
12
L8-25/2/C
111
6
L8-25/3/C
164
4
30
L8-30/1/C
48
12
L8-30/2/C
111
6
L8-30/3/C
164
4
32
L8-32/1/C
50
12
L8-32/2/C
111
6
L8-32/3/C
166
4
40
L8-40/1/C
55
12
L8-40/2/C
122
6
L8-40/3/C
183
4
50
L8-50/1/C
63
12
L8-50/2/C
143
6
L8-50/3/C
210
4
63
L8-63/1/C
71
12
L8-63/2/C
160
6
L8-63/3/C
239
4
SSNA9000
L8
Circuit
Protection
M
M6
Trip Characteristic C (5~10 x IN) – Inductive loads
1 Pole + Neutral
Rated
Current
(A)
Catalog Number
3 Pole + Neutral
Std.
Std.
Price Pkg.
1
L8-1/1N-2/C
88
6
L8-1/3N/C
210
3
2
L8-2/1N-2/C
88
6
L8-2/3N/C
210
3
4
L8-4/1N-2/C
88
6
L8-4/3N/C
210
3
5
L8-5/1N-2/C
88
6
Not Available
~
~
6
L8-6/1N-2/C
88
6
L8-6/3N/C
210
3
8
L8-8/1N-2/C
88
6
L8-8/3N/C
210
3
10
L8-10/1N-2/C
88
6
L8-10/3N/C
210
3
13
L8-13/1N-2/C
88
6
L8-13/3N/C
210
3
16
L8-16/1N-2/C
88
6
L8-16/3N/C
210
3
20
L8-20/1N-2/C
88
6
L8-20/3N/C
210
3
25
L8-25/1N-2/C
95
6
L8-25/3N/C
221
3
32
L8-32/1N-2/C
97
6
L8-32/3N/C
223
3
40
L8-40/1N-2/C
101
6
L8-40/3N/C
239
3
50
L8-50/1N-2/C
128
8
L8-50/3N/C
290
3
63
L8-63/1N-2/C
137
8
L8-63/3N/C
319
3
L8
SSNA9000
Circuit
Protection
M
M7
Trip Characteristic D
Trip Characteristic D (10~20 x IN) – Highly inductive loads ➌
2 Pole ➋
1 Pole ➊
Rated
Current
(A)
Catalog Number
Std.
3 Pole ➋
Std.
Std.
Price Pkg.
0.5
L8-.5/1/D
44
12
L8-.5/2/D
101
6
Not Available
~
~
1
L8-1/1/D
44
12
L8-1/2/D
101
6
L8-1/3/D
145
4
2
L8-2/1/D
44
12
L8-2/2/D
101
6
L8-2/3/D
145
4
3
L8-3/1/D
44
12
L8-3/2/D
101
6
L8-3/3/D
145
4
4
L8-4/1/D
44
12
L8-4/2/D
101
6
L8-4/3/D
145
4
5
L8-5/1/D
44
12
L8-5/2/D
101
6
L8-5/3/D
145
4
6
L8-6/1/D
44
12
L8-6/2/D
101
6
L8-6/3/D
145
4
7
L8-7/1/D
44
12
L8-7/2/D
101
6
L8-7/3/D
145
4
8
L8-8/1/D
44
12
L8-8/2/D
101
6
L8-8/3/D
145
4
10
L8-10/1/D
44
12
L8-10/2/D
101
6
L8-10/3/D
145
4
13
L8-13/1/D
44
12
L8-13/2/D
101
6
L8-13/3/D
145
4
15
L8-15/1/D
44
12
L8-15/2/D
101
6
L8-15/3/D
145
4
16
L8-16/1/D
44
12
L8-16/2/D
101
6
L8-16/3/D
145
4
20
L8-20/1/D
44
12
L8-20/2/D
101
6
L8-20/3/D
145
4
25
L8-25/1/D
48
12
L8-25/2/D
111
6
L8-25/3/D
164
4
30
L8-30/1/D
48
12
L8-30/2/D
111
6
L8-30/3/D
164
4
32
L8-32/1/D
50
12
L8-32/2/D
111
6
L8-32/3/D
166
4
40
L8-40/1/D
55
12
L8-40/2/D
L8-40/3/D
183
4
122
6
SSNA9000
L8
Circuit
Protection
M
M8
Trip Characteristic D (10~20 x IN) – Highly inductive loads
1 Pole + Neutral
Rated
Current
(A)
Catalog Number
3 Pole + Neutral
Std.
Price
Std.
Pkg.
1
L8-1/1N-2/D
88
6
L8-1/3N/D
210
3
2
L8-2/1N-2/D
88
6
L8-2/3N/D
210
3
4
L8-4/1N-2/D
88
6
L8-4/3N/D
210
3
6
L8-6/1N-2/D
88
6
L8-6/3N/D
210
3
8
L8-8/1N-2/D
88
6
L8-8/3N/D
210
3
10
L8-10/1N-2/D
88
6
L8-10/3N/D
210
3
13
L8-13/1N-2/D
88
6
L8-13/3N/D
210
3
16
L8-16/1N-2/D
88
6
L8-16/3N/D
210
3
20
L8-20/1N-2/D
88
6
L8-20/3N/D
210
3
25
L8-25/1N-2/D
95
6
L8-25/3N/D
221
3
32
L8-32/1N-2/D
97
6
L8-32/3N/D
223
3
40
L8-40/1N-2/D
101
6
L8-40/3N/D
239
3
L8
SSNA9000
Circuit
Protection
M
M9
Accessories
Series L8 Supplementary Protectors
Accessories
Module
For use
with…
Description
Connection
Diagrams
Catalog Number
Price
Selectable Two Pole Auxiliary Contact or
Auxiliary / Signal Alarm Module –
• Small set-screw alternates between operational modes
• Two Form C (two changeover contacts)
•Installs on left side of L8
• Auxiliary contact switches when L8 is operated manually or tripped electrically
• Signal Alarm contact switches only when L8 is tripped electrically
All L8s
& Shunt
Trip
Two pole auxiliary mode
LX-AHS3
71
12…110VAC
(12…60VDC)
Z8-ASA24
145
110…415VAC
(110…230VDC)
Z8-ASA230
145
Z8-USA115
Z8-USA230
307
Auxiliary / Signal alarm mode
All L8s
Shunt Trip –
• Remotely trips the device
• Installs on left side of L8
Undervoltage Release –
• Prevents device from operating unless voltage is present
• Test button
All L8s
50…115 VAC
110…230 VAC
Allowable Combinations of Field Installed Modules
M
L8
All modules install on the left side of the L8.
M10
SSNA9000
Circuit
Protection
(1) Auxiliary Contact Module
(1) Selectable Two Pole Auxiliary Contact Module / Auxiliary & Signal Alarm Contact Module
(1) Shunt Trip Module
(1) Undervoltage Release Module
(1) Auxiliary Contact Module + (1) Shunt Trip Module
Accessories
Accessories
Accessory
Description
For use with…
Bus Bar – ➊
• Connects one, two and three pole L8s
• Connects one pole + neutral and three pole + neutral MCBs
• Rated to 80A
• Available in 1 meter lengths
• IEC rated only
End Caps – ➋
• Covers end of Bus Bar to provide touch safe protection (minimum order quantity 10)
Padlock Hasp –
• Fits securely over switch handle. Prevents unauthorized activation of L8 during maintenance
• Provision for one padlock
Catalog Number
Price
All L8 one pole devices
ZV7-16-1P-1TE
54
All L8 two pole devices &
one pole + neutral
ZV7-16-1P+N-2TE
147
All L8 three pole devices
ZV7-16-3P-3TE
185
All L8 three pole +
neutral devices
ZV7-16-3P+N-4TE
250
Fits ZV7-16-1P+N-2TE &
ZV7-16-3P-3TE
ZV7-16-AK/2+3P
3
Fits ZV7-16-3P+N-4TE
ZV7-16-AK/4P
3
All L8 MCBs
L8-ASPLOA
12
DIN-rail - 2 meter lengths (6' 6")
3F
3AF
Top Hat, low profile (price per rail)
Top Hat, high profile (price per rail)
See page
A58
Circuit
Protection
➊ Each bus bar accommodates:
1 pole bus connects 57 devices
Total current must not exceed 80A per bus.
➋ Sold in packages of 10. Price indicated is price per piece.
Minimum order quantity 10.
L8
SSNA9000
M
M11
Technical Information
General Data
B Curve
C Curve
D Curve
Resistive or slightly resistive
Inductive Loads
Highly Inductive Loads
Tripping Characteristic In
Approvals
3…5 x In
UR, CSA, CE
5…10 x In
UR, CSA, CE
(All models ) IEC-EN 60 898 / DIN 43 880
10…20 x In
UR, CSA, CE
Supplementary Protector
Approvals
UL 1077 - Recognized Component QVNU2 - E304759
CSA 22.2 No. 235 Certified Component
UG A - General Industrial
FW 3 Line and Load evaluated for field wiring
OL 0 (general use)
Use Group (UG)
Terminals (FW)
Overload Rating (OL)
1-Pole, 1-Pole + N
Maximum Volts
Tripping Current (TC)
Short-Circuit Current Rating (SC)
< 35 A
40, 50, 63 A
277V AC
TC 1, 40 °C
SC U2
10 kA @ 277V AC; B and C Curve
5 kA @ 277V AC; D Curve
5 kA @ 277V AC; B, C, and D Curve
48V DC
TC 1, 40 °C
SC U1
10 kA @ 48V DC; B, C, and D Curve
480Y/277V AC
TC 2, 40 °C
125V DC (2-pole - series)
TC 2, 40 °C
2-Pole, 3-Pole, 3-Pole + N
Maximum Volts
Tripping Current
SC U2
SC U1
40, 50, 63 A
10 kA @ 480Y/277V AC; B and C Curve
5 kA @ 480Y/277V AC; D Curve
5 kA @ 480Y/277V AC; B, C, and D Curve
[A]
IEC / EN 60 898 IEC / EN 60 947-2
1…63
Short-Circuit Current Rating (SC)
< 35 A
Miniature Circuit Breaker
Approvals
Current Range
Thermal Tripping Characteristic
Interrupt Rating; 1 pole
Interrupt Rating; multi-pole
Rated Impulse Withstand Voltage U
Rated Insulation Voltage U
Overload Category / Pollution Degree
Rated Operation Voltage U
Approval
Rated Ultimate Short Circuit Breaking
Capacity
[kA]
[kA]
[V]
[VAC]
0.5…63
>1 hr. at 1.13 x In
<1 hr. at 1.45 x In
0.5…40
10 @ 240VAC
10 @ 415VAC
4000V
440VAC
III / 2
240 / 415
IEC / EN 60 947-2
[VAC]
15 – 0.5 cos @240 / 415VAC
L8
SSNA9000
Circuit
Protection
M
M12
Technical Information (continued)
Environmental and General Specifications
Dielectric Strength
Shock
Vibration
[VAC]
[G]
Operating Temperature Range
Shipment and Short Term Temperature
Limits
Housing Material
Switched Neutral Rating
[°F]
1960
25 (half sine wave for 11ms - 3 axis)
Frequency range: 10…2000Hz
Maximum amplitude (p - p) = 0.030 in.
Maximum acceleration = 5G
2 hours each of 3 axis
23…+104 (–5…+40°C)
[°F]
–40…+185 (–40…+85°C)
Nylon
277
6000 operations
(1 operation = 2 switching events) ON/OFF
[VAC]
Electromechanical Life
Circuit Diagrams
1 pole
1 pole + neutral
2 pole
Back up Protection
Supplementary Protectors / Fuses: The following table
shows the maximum short circuit current when fuses
meeting the requirements of IEC 60269-1 are used as backup
protection to MCBs.
3 pole
3 pole + neutral
Miniature Circuit
Breaker
Characteristic B
Characteristic C
Upstream Fuse
160A
200A
Rated
Current (In)
100A
1…10A
40kA
25kA
25kA
10…50A
50kA
40kA
25kA
63A
50kA
40kA
10kA
Mechanical Data
Degree of Protection
Mechanical endurance
Method of mounting
Supply connection
Terminations
Wire size
[ops.]
solid / stranded
Recommended Wire Strip Length
Weight / pole
Mounting Position
in (mm)
[g] / [lb]
360˚
IP20
6,000 (1 operation = 2 switching movements – ON/OFF
35mm mounting rail (EN50022)
Line or load side
#18…4 AWG (1.0…10 mm2)
Tightening Torque — 2.4 N•m (21 lb-in.)
#6…4 AWG (1.6…25 mm2)
Tightening Torque — 3.1 N•m (27 lb-in.)
0.51 (13)
120 / 0.32
360˚
L8
SSNA9000
Circuit
Protection
M
M13
Continuous Current Rating Factor
Rated Diversity Factor
When multiple supplementary protectors are mounted side by side, they must be
derated to determine the load carrying capacity.
Accessories
Degree of protection (Field Wiring Terminals)
Minimum Impulse Duration
Minimum Command Time
Operating Voltage
[ms]
[ms]
[V]
Auxiliaries
Z8-AHK, NHK
IP20 (IP 00)
~
~
~
~
Inrush Current
~
[V]
~
~
Dropout
Voltage Range
Max. operational current Ie
AC13
IEC
AC15
DC12
250V [A]
250V [A]
110V [A]
UL1077 /
CSA22.2
230V [A]
110V [A]
AC
DC
Mechanical Life-span
Terminations ➊
[ops]
0.7…0.35 x Us
~
~
~
~
~
Shunt Trip
Z8-ASA…
IP20 (IP 00)
>15
≤200
12…110VAC (Z7-ASA24)
12…60VDC
110…415VAC (Z7-ASA230)
110…230VDC
25 / 12 (AC
15 / 2 (DC)
~
0.7…1.1 x Us
~
~
~
~
3
0.5
0.5
Umin - 5V CDC
2
0.5
Umin - 5V CDC
Auxiliaries
Z8-AHK, NHK
6000
~
~
~
~
Undervoltage Release
Z8-USA…
10000
Shunt Trip
Z8-ASA…
4000
0.5…2.5 (18…14)
0.5…2.5 (18…14)
0.8 / 7
45 / 0.1
0.5…4 (18…14)
0.5…2.5 (18…14)
1.1 / 10
155 / 0.4
1.0…25 (18…8)
1.0…4 (18…12)
2.4 / 21
155 / 0.4
Terminal type
Wire size
solid / stranded
Tightening torque
Weight
1 conductor
2 conductors
[Nm] / [lb-in]
[g] / [lbs]
➊ When using two wires, use same cross section.
M14
SSNA9000
L8
Circuit
Protection
M
[mA]
Undervoltage Release
Z8-USA…
IP20 (IP 00)
~
~
Un - 115V (Z7-USA115)
Umin - 50V
Un - 230/240 (Z7-USA230)
Umin - 110V
3.6 / 44 (AC/DC)
Maximum let-through energy L8
Maximum let-through current L8
Type B
Type B
3
B60
B5
0
4
B
2
B35
B2 0
B26
B1
3
B1
0
B1
50000
40000
30000
10000
9000
8000
7000
6000
6
B1
3
B1
0
B1
5000
4000
20000
B6
B4
10000
9000
8000
7000
6000
5000
B2
4000
3000
B6
B4
3000
Let-through current [A]
15000
Let-through energy I2t [A2 sec]
B2 B2 B3 B4 B B6
0 5 2 0 50 3
80000
70000
60000
2000
1500
B2
1000
2000
1500
1000
900
800
700
600
500
500
400
Available short circuit current [A]
15000
6000
7000
8000
9000
10000
4000
3000
2000
1500
Available short-circuit current [A]
Type C
Type C
3
C6 0
C5
0
C42
C3 5
C20
C26
C1
3
C10
C1
80000
70000
60000
50000
40000
30000
10000
9000
8000
C630
C5
C402
C3 5
C2
C206
C1
C130
C1
7000
6000
5000
C6
C4.5
C3
C3
4000
20000
C6
C4
C3.5
10000
9000
8000
7000
6000
5000
C3
C2.5
C2
C1.5
4000
3000
3000
15000
1000
500
15000
7000
8000
9000
10000
6000
4000
5000
3000
2000
1500
1000
500
300
2000
5
C2.
C2 5
C1.
1500
1000
2000
C1
1500
C1
1000
900
800
700
600
500
C0.5
400
6000
7000
8000
9000
10000
4000
3000
2000
1500
15000
L8
1000
500
15000
7000
8000
9000
10000
6000
4000
5000
3000
2000
1500
1000
500
300
SSNA9000
M
Circuit
Protection
500
M15
Type D
Type D
10000
9000
8000
0
D42
D35
2
D0
D2
6
D13
D1
0
1
D
80000
70000
60000
50000
40000
30000
6000
5000
D6
4000
20000
D4
D2
D4
15000
3000
D2
10000
9000
8000
7000
6000
5000
0
D42
D3
5
D20
2
D
6
D1
3
D10
D1
D6
7000
4000
3000
2000
1500
1000
2000
1500
1000
900
800
700
600
500
500
400
15000
6000
7000
8000
9000
10000
4000
3000
2000
1500
1000
500
15000
7000
8000
9000
10000
6000
4000
5000
3000
2000
1500
1000
500
300
L8
SSNA9000
Circuit
Protection
M
M16
Dimensions
L8 Supplementary Protectors (Series L8…B, C & D)
Dimensions are in millimeters (inches). Dimensions not intended for manufacturing purposes.
1-pole
2-pole and
1-pole + neutral
3-pole
3-pole + neutral
One & Two Pole Auxiliary Contact, Signal Alarm Contact (LX-AHS3)
Shunt Trip & Undervoltage Release Modules (Z8-ASA…& Z8-USA…)
Undervoltage Release Module
L8
SSNA9000
Shunt Trip
Circuit
Protection
M
M17
Sprecher+Schuh includes a line of
circuit breakers approved for branch
circuit applications in the United
States and Canada and certified as a
Miniature Circuit Breaker for IEC
applications.
Series L9
UL-489 Miniature
Circuit Breakers
Broad product range &
flexibility
Industrial Circuit
Breakers for Branch
Circuit Protection
up to 40 Amps
The Sprecher + Schuh L9 Miniature
Circuit Breakers provide a variety
of product configurations by offering current ranges of 0.5A to 40A
with voltage ranges of 240V AC and
480Y/277V AC. The Series L9 DIN
Rail-mounted circuit breakers are
similar in width and current range to
circuit breakers with the added benefit
of providing listed branch circuit protection circuit breaker for US/Canada
applications.
®
Also available for control circuit applications are add-on auxiliary and
signal contacts plus shunt trip modules
to provide modern control circuit
applications. A lock-off attachment is
available for applications requiring that
feature.
Safety features provide
enhanced protection
The series L9 Miniature Circuit Breakers feature finger-safe IPX/2 from the
front of the circuit breaker to guard
against accidental contact with live
parts.
To aid troubleshooting, a color-coded
indicator provides positive visual
indication of the device status (green
for OFF, red for ON and isolation
function).
The Series L9 also incorporate a trip
free mechanism - ensuring that the
device operation cannot be defeated
by holding the operator in the ON
position.
Easy installation
The Series L9 Miniature Circuit Breakers mount on a standard 35mm DINrail. Wire terminals accept multiple
conductors. In addition, power to the
circuit breakers can be fed from the
line or load side.
Global approvals for
worldwide acceptance
The Sprecher + Schuh L9 Circuit
Breakers are UL489 listed, CSA 22.2
No. 5.1 approved and meets IEC
60 947-2. The Series L9 also have
an HACR rating (heating and air
conditioning) as well as a "Switching
Duty" (SWD) rating from 0.5 to 20A.
Switching Duty ratings are related to
fluorescent light applications only, not
High intensity discharge (HID) lights
or any other types of loads. Advanced
features and global approvals make
the Series L9 an ideal product for
use in industrial equipment installed
throughout the world.
17.5mm
35mm
52.5mm
One Pole
Two Pole
Three Pole
(≈11/16˝)
M18
(≈1-3/8˝)
(≈2-1/8˝)
SSNA9000
L9
Circuit
Protection
M
The Series L9 products are thermalmagnetic (inverse time) circuit breakers offering the benefits of a modern
circuit breaker design in a compact
size. The L9 is used mainly in control circuit applications where branch
circuit approved circuit breakers are
required.
Because of its range of protection
(from 0.5 to 40A) many customers
may use this product for protection of load devices where fuses or
other supplementary protector devices
previously were used in the U.S. and
Canada.
North American applications (UL 489
and CSA 22.2 No. 5.1). For IEC applications, the products are rated 415V
AC 0.5 to 40A.
Continuous Current Rating
Standard current ratings are: 0.5A, 1A,
1.5A, 2A, 3A, 4A, 5A, 6A, 7A, 8A,
10A, 15A, 16A, 20A, 25A, 30A, 32A,
35A and 40A.
Description
The L9 circuit breakers are rated in
RMS amperes at 40°C (104°F) ambient temperature per the UL 489 (CSA
22.2 No. 5.1) standard. This temperature is generally used as the average
temperature within an industrial enclosure. If a circuit breaker is applied
in a temperature that exceeds 40°C
(104°F) ambient, then the circuit
breaker should be derated. For IEC 60
947-2 standard, the products carry an
ambient rating of 30° C. Follow standard IEC application considerations
for temperature rating in different
ambient temperatures.
L9 Circuit Breakers for Branch Circuit
protection are available one (1)-, two
(2-), and three (3-) pole construction
and are rated 0.5 to 40A at 240VC AC
and 0.5 to 20A at 480Y/277V AC for
The characteristic trip curves are
shown on page M34. The trip bands
shown for each breaker represent
current tripping limits for a circuit
Protection of PLC I/O, solenoids,
power supplies and control transformers along with providing the listed
branch circuit protection is available in
one device.
Compare these advanced features
Box lug terminals accept #18…#6
AWG wire as standard
Current limiting and interrupting
capacity up to 10kA at 480Y/277V AC.
Trip-free mechanism; device operation
cannot be defeated by holding the
operator in the ON position
Color coded indicator provides visual
indication of the device status and
isolation function
Example: The L9 time-current graph
on page M34 shows that a one-pole,
15 A, L9 circuit breaker trips in not
less than 10 sec, and not more than
120 sec. on a 30 A current. Because
the UL standard defines this time
spread, users should not specify exact
tripping time. The lower current portion of the curves (upper left) depict
the time to trip due to thermal action
and reflect overload protection of the
wire and connect load. The higher
current portion of the curves (lower
right) depicts the trip due to the magnetic action of the circuit breaker and
reflects protection due to short circuit
level currents.
Line and load side terminals accept
bus bar connections for reduced
costs and more efficient installation of
multiple devices.
Guarded pozidrive terminal screws
with finger-safe protection to IEC
947-1
Devices install on standard 35mm
DIN-rail (EN 50022)
Magnetic trip elements provide Type
C and D trip characteristics (IEC and
EN 60898), while bimetallic elements
protect against slight overloads.
M
Amp rating and trip curve
characteristic clearly marked on the
device for easy identification.
L9
SSNA9000
Available in one, two and three pole;
breaker and are within the limits established by UL. For a specific current
at 40°C (104°F), a circuit breaker will
open ("clear the circuit") automatically
at some total time that will be within
the "Minimum" and "Maximum"
time shown on the curves.
Circuit
Protection
Product Design &
Application
M19
L9 UL489 Miniature Circuit Breakers
Trip Characteristic C (5~10 x IN) – Inductive loads
1 Pole ➋
➊
UL/CSA Rated
Max. Current
Volt.
(A)
Catalog Number
0.5
1
1.5
480Y/277
240
Price
Std.
Pkg. Catalog Number
Price
Std.
Pkg. Catalog Number
Price
Std.
Pkg.
L9-.5/1/C
97
2
L9-.5/2/C
185
1
L9-.5/3/C
251
1
L9-1/1/C
97
2
L9-1/2/C
185
1
L9-1/3/C
251
1
L9-1.5/1/C
97
2
L9-1.5/2/C
185
1
L9-1.5/3/C
251
1
2
L9-2/1/C
97
2
L9-2/2/C
185
1
L9-2/3/C
251
1
3
L9-3/1/C
97
2
L9-3/2/C
185
1
L9-3/3/C
251
1
4
L9-4/1/C
97
2
L9-4/2/C
185
1
L9-4/3/C
251
1
5
L9-5/1/C
97
2
L9-5/2/C
185
1
L9-5/3/C
251
1
6
L9-6/1/C
97
2
L9-6/2/C
185
1
L9-6/3/C
251
1
7
L9-7/1/C
97
2
L9-7/2/C
185
1
L9-7/3/C
251
1
8
L9-8/1/C
97
2
L9-8/2/C
185
1
L9-8/3/C
251
1
10
L9-10/1/C
97
2
L9-10/2/C
185
1
L9-10/3/C
251
1
13
L9-13/1/C
97
2
L9-13/2/C
185
1
L9-13/3/C
251
1
15
L9-15/1/C
97
2
L9-15/2/C
185
1
L9-15/3/C
251
1
16
L9-16/1/C
97
2
L9-16/2/C
185
1
L9-16/3/C
251
1
20
L9-20/1/C
97
2
L9-20/2/C
185
1
L9-20/3/C
251
1
25
L9-25/1/C
107
2
L9-25/2/C
198
1
L9-25/3/C
251
1
30
L9-30/1/C
110
2
L9-30/2/C
211
1
L9-30/3/C
279
1
32
L9-32/1/C
110
2
L9-32/2/C
211
1
L9-32/3/C
279
1
35
L9-35/1/C
110
2
L9-35/2/C
211
1
L9-35/3/C
279
1
40
L9-40/1/C
115
2
L9-40/2/C
227
1
L9-40/3/C
292
1
L9 Miniature Circuit Breaker Features:
• UL-489 listed for Branch Circuit protection and CSA 22.2 No. 5.1 Approved
• Thermal magnetic protection
• Trip characteristic based on 40°C ambient for UL/CSA
• 10kA interrupting rating
• All ratings are HACR rated (SWD rated up to 20 A)
• Finger safe design (front)
• DIN rail mounting
➊ Rated 415V AC, 48V DC, IEC max/min meets IEC 60947-2 for miniature circuit breakers.
➋ 1-Pole 277V AC, 48V DC 0.5…20A; 240V AC, 48V DC 30…40A
➌ 2-Pole (series) 96VDC 0.5...40A
M20
SSNA9000
L9
Circuit
Protection
M
3 Pole
2 Pole ➌
L9 UL489 Miniature Circuit Breakers
Trip Characteristic D (10~20 x IN) – Highly inductive loads
1 Pole ➋
➊
UL/CSA Rated
Max. Current
Volt.
(A)
Catalog Number
0.5
240
Price
3 Pole
Std.
Pkg. Catalog Number
Price
Std.
Pkg. Catalog Number
Price
Std.
Pkg.
L9-.5/1/D
97
2
L9-.5/2/D
186
1
L9-1.5/3/D
256
1
1
L9-1/1/D
97
2
L9-1/2/D
186
1
L9-1/3/D
256
L9-1.5/1/D
97
2
L9-1.5/2/D
186
1
L9-1.5/3/D
256
1
2
L9-2/1/D
97
2
L9-2/2/D
186
1
L9-2/3/D
256
1
3
L9-3/1/D
97
2
L9-3/2/D
186
1
L9-3/3/D
256
1
4
L9-4/1/D
97
2
L9-4/2/D
186
1
L9-4/3/D
256
1
186
1
L9-5/3/D
256
1
1
1
1.5
480Y/277
2 Pole ➌
5
L9-5/1/D
97
2
L9-5/2/D
6
L9-6/1/D
97
2
L9-6/2/D
186
1
L9-6/3/D
256
7
L9-7/1/D
97
2
L9-7/2/D
186
1
L9-7/3/D
256
1
186
1
L9-8/3/D
256
1
1
8
L9-8/1/D
97
2
L9-8/2/D
10
L9-10/1/D
97
2
L9-10/2/D
186
1
L9-10/3/D
256
13
L9-13/1/D
97
2
L9-13/2/D
186
1
L9-13/3/D
256
1
15
L9-15/1/D
97
2
L9-15/2/D
186
1
L9-15/3/D
256
1
16
L9-16/1/D
97
2
L9-16/2/D
186
1
L9-16/3/D
256
1
20
L9-20/1/D
97
2
L9-20/2/D
186
1
L9-20/3/D
256
1
25
L9-25/1/D
107
2
L9-25/2/D
199
1
L9-25/3/D
285
1
30
L9-30/1/D
110
2
L9-30/2/D
199
1
L9-30/3/D
285
1
32
L9-32/1/D
110
2
L9-32/2/D
199
1
L9-32/3/D
285
1
35
L9-35/1/D
115
2
L9-35/2/D
199
1
L9-35/3/D
285
1
40
L9-40/1/D
115
2
L9-40/2/D
212
1
L9-40/3/D
310
1
L9 Miniature Circuit Breaker Features:
• UL-489 listed for Branch Circuit protection and CSA 22.2 No. 5.1 Approved
• Thermal magnetic protection
• Trip characteristic based on 40°C ambient for UL/CSA
• 10kA interrupting rating
• All ratings are HACR rated (SWD rated up to 20 A)
• Finger safe design (front)
• DIN rail mounting
➊ Rated 415V AC, 48V DC, IEC max/min meets IEC 60947-2 for miniature circuit breakers.
➋ 1-Pole 277V AC, 48V DC 0.5…20A; 240V AC, 48V DC 30…40A
➌ 2-Pole (series) 96VDC 0.5...40A
L9
SSNA9000
Circuit
Protection
M
M21
Accessories
Series L9 UL489 Miniature Circuit Breakers
Accessories
Module
Description
Selectable Two Pole Auxiliary
Contact or Auxiliary / Signal
Alarm Module ➊➋
For use with… Contact Rating
All L9s &
Shunt Trips
UL/CSA Max. volt
2A, 240V AC
0.5A, 110V DC
Connection
Diagrams
Two pole auxiliary mode
Catalog Number
Price
LX-AHS3
71
L9-ABH12
66
L9-ASTA1
76
L9-ASTA2
76
L9-AALOA
20
Auxiliary / Signal alarm mode
Two Pole Auxiliary Contact ➌
All L9s &
Shunt Trips
110…415V AC
110...230V DC
Shunt Trip –
• Remotely trips the device
UL/CSA Max. volt
2A, 230V AC
0.5A, 110V DC
All L9s
12…110V AC
12...60V DC
Padlock Hasp –
•Fits securely over switch handle.
Prevents unauthorized activation of
L9 during maintenance
+
X
Shunt
L9-AAST...
X
X
Allowable Combinations of Field Installed Modules
(1) Selectable Two Pole Auxiliary Contact Module / Auxiliary & Signal Alarm Contact Module
(1) Shunt Trip Module
(1) Auxiliary Contact Module + (1) Shunt Trip Module
L9-...
All modules install on the left side of the Circuit Breaker.
X
X
X
Allowable Combinations of Accessories per Circuit Breaker (read left to right)
➊ Use of auxiliary or signal contact limits the circuit breaker to a maximum voltage of 240VAC for UL/CSA applications.
➋L9 Circuit Breakers are restricted to operate at a maximum of 240VAC for UL/CSA applications when attached to the LX-AHS3.
➌L9 Circuit Breakers are permitted to operate at a maximum of 480Y/277VAC for UL/CSA applications when attached to the L9-ABH12.
M22
SSNA9000
L9
Circuit
Protection
M
Auxiliary
Contacts
X
All L9s
Accessories
L9 Bus Bars 7 Accessories ➊➌➍
Description
No. of Poles
Bus Bar
No. of
Phases
Length
➋
UL Max.
Amps @
40°C
No. of Circuit
Breakers
Catalog Number
Price
106 mm
6
L9-AACL106
66
212 mm
12
L9-AACL112
105
18
318 mm
18
L9-AACL118
142
6
106 mm
3
L9-AACL206
77
6
12
1
6
L9-AACL212
123
18
318 mm
9
L9-AACL218
174
6
106 mm
2
L9-AACL306
89
212 mm
4
L9-AACL312
143
318 mm
6
L9-AACL318
203
12
12
2
3
18
212 mm
80
Pkg Qty
10
L9 Bus Bar Accessories
Description
No. of Poles
Wire Range
Catalog Number
Price
Pkg Qty
L9-AACLT35
51
10
L9-AACLPS
7
10
Terminal Lug
1 for Circuit Breaker Termination
#14 ... #2 AWG
2.5 ... 35MM2
Protective Cover for unused
termination
3 pole set (May be separated)
~
Other Accessories
Accessory
Description
Catalog Number
Price
Top Hat, low profile (price per rail)
3F
Top Hat, high profile (price per rail)
3AF
See
page
A58
DIN-rail - 2 meter lengths (6' 6")
➊ UL 489 recognized (DIHS E304757), CE
➋ Total length from Circuit Breaker to Circuit Breaker when mounted on bus bars (not measurement of bus bar length).
➌ Bus bar can not be cut.
➍ Use of multiple bus bars permitted with overlap joint. Maximum of two joints permitted.
L9
SSNA9000
Circuit
Protection
M
M23
General Data
Number of Poles
Standards
1, 2 and 3
UL 489
CSA 22.2 No. 5.1
IEC 60 947-2
UL Listed Circuit Breaker (File Number E304753)
CSA Certified, CE
Yes
Yes (0.5...20 A)
UL/CSA: 40°C IEC: 30°C
UL/CSA: 10 000 AIC
IEC - lcu: 15 000 A
UL/CSA: 0.5...20 A, 480Y/277V AC
0.5...40 A, 240V AC
0.5...40 A 48V DC 1-pole
0.5...40 A 96V DC 2-pole
IEC: 0.5...40 A, 415V AC 48V DC
Finger-safe from front:
-IP20 per IEC 529 from front
-IP00 at wire terminals
1960V AC
25 G Half sine wave for 11 ms (3 axis)
Frequency range: 10...200 Hz
Max. Amplitude (p-p) = 0.030”
Max. Acceleration = 5 G
2 hours each of 3 axis
-5...55°C (23...131°F) (non-condensing)
C curve (Inductive) 5...10 IN
D curve (Highly Inductive) 10...20 IN
-40..85°C (-40...185°F)
1 wire: #18...6 AWG
2 wires: #18...10 AWG
#18...12 AWG: 21 lb-in.
#10...8 AWG: 25 lb-in.
#6 AWG: 36 lb-in.
#2 PoziDrive
0.5 in
Certifications
HACR Rating (USA/Canada)
SWD Rating (USA/Canada)
Calibration Temperature
Rated Interrupting Capacity
Rated Tripping Current
Degree of Protection
Dielectric Strength
Shock
Vibration
Normal Operating Environment
Trip Curves
Shipment and Short-Term Storage Limits
Wire Size
Terminal Torque
Recommended Wire Strip Length
Auxiliaries
Auxiliary Contact,
LX-AHS3, L9-ABH12
Yes
Yes
Yes
3A, 250V AC (AC13)
0.5A, 110V DC
2A, 240V AC ➊
0.5A, 110V DC
Cable
CSA/UL Certifications
IEC 60 947-2 Compliance
CE
IEC Max. Voltage
UL/CSA Max. Voltage
Connection
Shunt Trip Module
L9-ASTA1
Yes
Yes
Yes
110...415V AC
110...230V DC
110...415V AC
110...230V DC
Cable
Shunt Trip Module
L9-ASTA2
Yes
Yes
Yes
12...110V AC
12...60V DC
12...110V AC
12...60V DC
Cable
Mechanical Life-span
[ops]
Aux...LX-AHS3
6000
Shunt Trip L9-AASTA...
4000
0.5...2.5 (18...14)
0.5...2.5 (18...14)
0.8 / 7
45 / 0.1
1.0...6 (18...10)
1.0...6 (18...10)
2.8 / 25
155 / 0.4
Terminal type
Wire size
solid /stranded
Tightening torque
Weight
1 conductor
2 conductors
[Nm] / [lb-in]
[g] / [lbs]
➊L9 Circuit Breakers are restricted to operate at a maximum of 240VAC for UL/CSA applications when attached to the LX-AHS3.
M24
SSNA9000
L9
Circuit
Protection
M
Terminations
Dimensions
L9 Miniature Circuit Breakers (Series L9…C & D)
Dimensions are in millimeters (inches). Dimensions not intended for manufacturing purposes.
1 pole
2 pole
3 pole
Two Pole Auxiliary Contact (w/ Signal Alarm Contact)
Two Pole Auxiliary Contact
45
96
44
71.6
5.5
10
53
60
LX-AHS3
L9-ABH12
Shunt Trip (L9-AASTA...)
L9-AASTA...
L9
SSNA9000
Circuit
Protection
M
M25
Dimensions
L9 -AACL_06 - 6 Pole Bus Bars
Dimensions are in millimeters (inches).
Dimensions not intended for manufacturing
purposes.
L9-AACL_12 - 12 Pole Bus Bars
L9-AACL_18 - 18 Pole Bus Bars
L9-AACLT35 - Terminal Lug
L9-AACLPS - Protective Cover
17,6
3,55
M
17,6
7
L9
16
M26
BLACK
PR INT ING
SSNA9000
Circuit
Protection
24
Dimensions
Applying L9 Bus Bars & Accessories
L9
SSNA9000
Circuit
Protection
M
M27
Dimensions
Applying L9 Bus Bars & Accessories
L9
SSNA9000
Circuit
Protection
M
M28
Methods
of Applying
CIRCUIT
PROTECTION
This information is provided to aid in proper system design and utilization of circuit
protection devices in North American applications. Be sure to consider all applicable
local and national codes for your particular installation.
L8/L9
SSNA9000
Circuit
Protection
M
M29
Circuit Protection Methods
Applying L8 Supplementary Protectors in accordance with UL & NEC Guidelines
UL 508A, a procedure covering industrial control panels, offers guidelines
in applying supplementary overcurrent protective devices. The general areas of acceptability are in the primary and secondary protection of control
transformers, and also control circuit protection. Other uses of Mini-CB’s
may be submitted to UL for further investigation.
Per UL 508A, before utilizing a supplementary device for control
transformer overcurrent protection, the supplementary device must
meet the following restrictions:
Unless otherwise specified it is used with protection, either fuse
or circuit breakers upstream from the supplementary device, rated
at 400 percent of the supplementary protector rating but not less
than 20A for device rated 150V or less and 15A for devices rated
150V or more.
(Reference: UL 508A procedure prescribed only)
Protection of Control Transformers
Control transformers can generate an almost infinite current spike on
start-up while attempting to overcome core saturation. Only the resistance of the control transformer windings and the inductance of the circuit limit the large current draw. The inrush spikes are of short duration
(1/8 to 1/4 of a cycle), typically reaching between 8~20 x In. Therefore,
selecting a Mini-CB with the proper current rating and high inrush trip
characteristics is ideal to avoid nuisance tripping. Sprecher+Schuh Series
L8 “C” & “D” type Supplementary Protectors offer high inrush capabilities from 5~10 x In and 10~20 x In respectively.
Selecting the proper Mini-CB current ratings for the primary and secondary protection of control transformers (per UL/NEC) is as follows:
Secondary Overcurrent Protection for Control Transformers
Control Circuits: If the rated secondary current is less than 9 amps,
the maximum rating of the overcurrent device is 167%. If 9 amps or
more, the maximum rating of the overcurrent device is 125%. The
next larger size of an overcurrent device may be used if 125% does not
correspond to a standard size.
L8/L9
Circuit
Protection
M
Primary Overcurrent Protection for Control Transformers
Control Circuits: If the rated primary current is less than 2 amps,
the maximum rating of the overcurrent device is 500%. If the rated
primary current is more than 2 amps, the maximum rating of the
overcurrent device is 250%.
M30
(Reference: UL 508 32.7, UL 845 11.16 & 11.17, NEC 43072(c) exception No. 2, 450-3(b) 1 & 2)
Example (see table for more calculated results)
Primary & Secondary Protection of a Control Transformer:
50VA Pri. 480/ Sec. 120V
Primary Mini-CB Selection
• 50VA/480V = 0.10A rated transformer primary current
• 0.10A is less than 2, therefore may increase up to 500%
• 0.10A x 500% = 0.52A, Select L8-.5/2/D (0.5 amp 2-Pole)
• Upstream BCPD must be rated at 400% of the selected Mini-CB
rating
• 0.5A x 400% = 2A, since rated below 15A at 150V or more, the
minimum BCPD is 15A per NEC-240.6
Primary Control Transformer Calculations (480 / 240V)
Transformer
VA
Primary
Volts
Rated
Amps ➊
Selected
L8 Mini-CB
Maximum
Upstream
BCPD ➋
50
480
0.10
0.5
15A
100
480
0.21
1
15A
150
480
0.31
1
15A
200
480
0.42
2
15A
250
480
0.52
2
15A
300
480
0.63
3
15A
500
480
1.04
5
25A
1000
480
2.08
5
25A
50
240
0.21
1
15A
100
240
0.42
2
15A
150
240
0.63
3
15A
200
240
0.83
4
15A
250
240
1.04
5
25A
300
240
1.25
6
25A
500
240
2.08
5
25A
1000
240
4.17
10
60A
➊ If the rated primary current is less than 2 amps, the maximum rating of the
overcurrent device is 500%. If the rated primary current is more than 2 amps, the
maximum rating of the overcurrent device is 250%.
➋ Minimum standard BCPD ampere rating is 15A per NEC-240.6.
SSNA9000
Sprecher+Schuh Series L8 Supplementary Protectors are recognized by
Underwriters Laboratories (UL). Representative samples of this product
have been evaluated by UL and meet applicable US safety standards. In
general, the UL Component Recognition service covers the evaluation of
components that will later be used in a complete product or system. L8
Supplementary Protectors are defined as UL Recognized supplementary
overcurrent protective devices under the standard of UL 1077.
Applying L8 Supplementary Protectors in accordance with UL & NEC Guidelines (continued)
Secondary Supplementary Protectors Selection
• 50VA/120V = 0.42A rated transformer secondary current
• 0.42A is less than 9, therefore may increase up to 167%
• 0.42A x 167% =0.70A, Select L8-1/1/D or L8-1/1/C
(1 amp 1-Pole)
Secondary Control Transformer Calculations (120 / 24V)
Transformer
VA
Secondary
Volts
Rated
Amps ➊
Selected
L8 Mini-CB
50
120
0.42
1
100
120
0.83
2
150
120
1.25
2
200
120
1.67
3
250
120
2.08
4
300
120
2.50
4
500
120
4.17
7
1000
120
8.33
13
50
24
2.08
4
100
24
4.17
7
150
24
6.25
10
200
24
8.33
13
250
24
10.42
13
300
24
12.50
16
500
24
20.83
30
1000
24
41.67
50
Protection of Control Circuit Devices
Control circuit devices can also generate inrush currents during startup,
though not as intense as control transformers. Devices such as control
relays, starter coils, and solenoids exhibit typical inrush levels between
6~10 x In. Also, protection of conductor wires or low-level signal devices
such as PLCs may exhibit even lower inrush levels ranging from 3~5 x
In. Depending on the inrush, an Mini-CB with a type “B” or “C” trip
characteristic will perform the task.
Control Circuit Conductor Protection
The relationship between the control circuit conductor size and rating of the
protective device must be in compliance with the tabulated data per UL 508.
(Reference: UL 508A procedure prescribed only)
Where can supplementary overcurrent
protectors not be used?
• Branch Circuit Protection Device (BCPD)
• Power Transformer Primary Protection
• Power Transformer Secondary Protection
• Protection of Loads such as for Motors, Heater, Lamps, and General use
Supplementary protectors may be submitted to UL for further investigation for other uses.
➊ If the rated secondary current is less than 9 amps, the maximum rating of the
overcurrent device is 167%. If 9 amps or more, the maximum rating of the
overcurrent device is 125%.
M31
L8/L9
SSNA9000
Circuit
Protection
M
Applying L9 UL489 Miniature Circuit Breakers in accordance with UL & NEC Guidelines (continued)
Description
Available Short Circuit Current
L9 Circuit Breakers for Branch Circuit protection are available one (1)-,
two (2-), and three (3-) pole construction and are rated 0.5 to 40A at
240VC AC and 0.5 to 25A at 480Y/277V AC for North American applications (UL 489 and CSA 22.2 No. 5.1). For IEC applications, the
products are rated 415V AC 0.5 to 40A.
The L9 circuit breakers should only be applied in those applications in
which the available short-circuit (or fault) current is less than or equal to
10,000 A.
Thermal Magnetic Circuit Breakers
The L9 Thermal Magnetic Circuit Breakers are general-purpose devices
suitable for the majority of industrial, inverse time circuit
breaker applications. They combine thermal and magnetic trip actions
and provide accurate overload and short-circuit protection for conductors
and connected equipment.
Region
IEC Regions
North America (UL 489 &
CSA 22.2 No. 5.1)
Max. Voltage
Current Range
415V AC
0.5...40 A
48V DC
0.5...40 A
240V AC
0.5...40A
480Y/277V AC
0.5...25A
1-pole 48V DC
0.5...40 A
2-pole 96V DC
0.5...40 A
Circuit Breaker Application Information
Application Considerations
Selection of a L9 circuit breaker with appropriate circuit protection
includes consideration of:
The selection of a specific ampere rating for a specific application is
dependent on the type of load and duty cycle and is governed by the National Electric Code (Canadian Electric Code) and UL/CSA. In general,
the codes require that overcurrent protection is at the current supply and
at points where wire sizes are reduced. In addition, the codes state that
conductors be protected according to their current carrying capacity.
There are specific situations that require application consideration, such
as motor circuit, and guidelines for the selection for transformer protection.
●
Circuit Voltage
●
Circuit Frequency
●
Available Short Circuit Current
●
Continuous Current Rating
●
Application Considerations
●
Special Operating Conditions
Circuit Voltage
The L9 circuit breakers are rated by voltage class. Applications should not
exceed the listed voltage and current range.
Circuit Frequency
The L9 circuit breakers may be applied to frequencies of 50 and 60 Hz
without derating. For applications above 60 Hz, contact Sprecher + Schuh
with specific application information for the derating of the circuit breakers.
The L9 circuit breakers are "non 100% rated" as defined UL 489, para
7.1.4.2. As such, the circuit breaker's rating should be loaded to no more
than 80% if used with continuous loads.
Branch Circuits
L9 circuit breakers may be used to protect branch circuits. A branch
circuit is the wiring portion of a system extending beyond the final
overcurrent device protecting the circuit. Guidelines established in NEC,
CED, UL and CSA should be used to determine the specific device.
1. Motor Branch Circuit
L9 circuit breakers are not horsepower rated because they are
able to safely interrupt currents far in excess of the locked rotor
value for a selected motor. This ability is recognized in the codes
and standards and is also established by the UL and CSA tests
described in UL 489 and CSA 22.2 No 5.1 standards.
M
L8/L9
Circuit
Protection
L9 circuit breakers may be used for transformer protection following the guidelines established. References: NEC 450 and UL 489.
Also see CEC and appropriate Canadian Standards. References:
NEC 450 and UL 489. Also see CEC and appropriate Canadian
Standards.
M32
SSNA9000
2. Transformer Protection
3. Heater Load, Lighting, and Other Load Protection
L9 circuit breakers may be used for protection of heater loads,
lighting loads and other loads following the guidelines established.
References: NED Article 31 and UL 508A. Also see CEC and
appropriate Canadian Standards.
Coordinated Overcurrent Protection
The L9 device is designed to substantially reduce the amount of letthrough-current and the resulting let-through-energy that can damage
protected components. The L9 has the ability to interrupt short circuit
current within the first half cycle of the fault. Limiting letthrough current
and energy will protect against the harmful effects of overcurrent and is
focused primarily on avoiding the following:
• Excessive Heat
• Mechanical Damage
SWD Rating
Both of these factors are proportional to the square of the current. Thermal energy is proportional to the square of the RMS value and magnetic
forces are proportional to the square of the peak value. The most effective
way to provide protection is to substantially limit letthrough-energy. This
provides the following advantages
• Far less damage at the location of the short circuit.
• Fast electric separation of a faulty unit from the system, especially
power supplies connected in parallel that are switched off when
the voltage of the power bus drops below a certain level.
• Far less wear on the miniature circuit breaker itself. This means
more safe interruptions.
• Better protection of all components in the short circuit path.
• Far wider range of selective action when used with an upstream
protective device. (No nuisance shut downs from feeder line interruptions, causing a blackout in all connected branches.)
The following values are applicable to the whole product range.
• Frequency: 50/60 Hz
L9 breakers (0.5 ... 20A) are rated as SWD and as such may be applied to switch fluorescent lighting loads up to their current and voltage
maximum.
The values are derived from worst case testing of D trip 40 A @ 240V
AC and D trip 25 A @ 480Y/277V AC.
Where an orderly shutdown is required to minimize the hazards to
personnel and equipment, a system of coordination based upon the
faulted or overloaded circuit is isolated by selective operation of only the
overcurrent protective device closest to the overcurrent condition. The
user should select devices that meet this requirement. References: NEC
240.12. Also see CEC.
HACR Rating
L9 Circuit Breakers are rated as Heating, Air Conditioning and Refrigeration circuit breakers as defined by UL489, paragraph 6.7 and may be
used in this type of application.
Current Limiting
L9 Circuit Breakers are rated as current limiting circuit breakers as defined by UL 489, paragraph 8.6.
The L9 line features the ability to achieve short circuit interruptions
far more effectively than conventional breakers. In conventional circuit
breakers, the short circuit interruption time required is approximately
one or two half cycles of an AC sine wave. When the contacts open, the
resulting arc continues to burn until the current level passes through
zero. The arc may re-ignite because of the insufficient width of the
contact gap. The current that flows until the arc is extinguished produces
a heating effect proportional to the I2t value (let-through-energy) of the
fault current.
Threshold
Current
Intermediate
Current
High Interrupt
Current
Vrms
240 V
(D40)
480Y/277V
(D25)
Symmetrical (kA)
2.6
1.625
I peak (kA)
2.9
2.0
I2t (kA2s)
18.0
12.0
Symmetrical (kA)
5.0
5.0
I peak
4.2
4.6
I2t
24.0
38.0
Symmetrical (kA)
10.0
10.0
I peak
6.2
6.2
43.0
60.0
I2t
(kA2s)
(kA2s)
L8/L9
SSNA9000
Circuit
Protection
M
M33
Determining Ratings
The standard tripping characteristics for the L9 Series is Type C Type C has a magnetic trip activated at 5...10 times the rated current of the circuit
breaker. The reference temperature for the thermal tripping characteristics is 40°C. The Type C characteristics will suit most applications.
In rare occurrences when the Type C characteristics does not fully meet the application, the following additional magnetic trip characteristics is available.
Type D allows for transient approximately twice as high as the standard Type C. Use the table and graphs to determine the current rating for the
breaker if the ambient is significantly different than 40°C.
Device Marked
Current Rating in
(A) @ 40°C
0.5
1.0
1.5
2.0
3.0
4.0
5.0
6.0
7.0
8.0
10.0
13.0
15.0
16.0
20.0
25.0
30.0
32.0
40.0
In (A) at higher Ambient Temperature
15°C
20°C
25°C
30°C
40°C
50°C
55°C
0.6
1.1
1.7
2.2
3.3
4.4
5.5
6.6
7.7
8.8
11.0
14.3
16.5
17.6
22.0
27.5
33.0
35.2
44.0
0.5
1.1
1.6
2.2
3.2
4.3
5.4
6.5
7.6
8.6
10.8
14.0
16.2
17.3
21.6
27.0
32.4
34.6
43.2
0.5
1.1
1.6
2.1
3.2
4.2
5.3
6.4
7.4
8.5
10.6
13.8
15.9
17.0
21.2
26.5
31.8
33.9
42.4
0.5
1.0
1.6
2.1
3.1
4.2
5.2
6.2
7.3
8.3
10.4
13.5
15.6
16.6
20.8
26.0
31.2
33.3
41.6
0.5
1
1.5
2
3
4
5
6
7
8
10
13
15
16
20
25
30
32
40
0.5
1.0
1.4
1.9
2.9
3.8
4.8
5.8
6.7
7.7
9.6
12.5
14.4
15.4
19.2
24.0
28.8
30.7
38.4
0.5
0.9
1.4
1.9
2l.8
3.8
4.7
5.6
6.6
7.5
9.4
12.2
14.1
15.0
18.8
23.5
28.2
30.1
37.6
Note: The table shows the corrected values of t
he rated current dependent on the ambient temperature.
L8/L9
SSNA9000
Circuit
Protection
M
M34
Series L8 and L9
Defining Electrical Standards Relating to Protection Devices
➊
➎
➋
➌
➏
➐
➐
➍
Sprecher + Schuh Products
➊ Branch Circuit Protection Device (BCPD)
Acceptable components
• Branch circuit protection device (UL489)
• Self-protected Type E manual motor controller (UL508-E)
➊
L10 Disconnect Switch
➋ Control Transformer Primary Protection
• UL-listed fuses (UL512)
• Supplementary protective device (UL1077)
➋
➌
➍
➎
➏
FH8 Fuse Holder
➌ Control Transformer Secondary Protection
• Supplementary protective device (UL1077)
• Miscellaneous, miniature and micro fuses
➍ Supplementary Circuit Protection
• Supplementary protective device (UL1077)
• Miscellaneous, miniature and micro fuses
➊
➏
➐
KT7 Motor Circuit Protector
➋
➌
➍
L8 Supplementary Protector
➎ Power Transformer Fuse/Branch Circuit Protection
• Branch circuit protection device or power-related
transformer fuses (UL489/512)
• Branch circuit protection device or power-related
transformer fuses (UL489/512)
➐ Motor Load Protection
V7 Fuse Blocks
➊
➋
➌
➍
➎
➏
L9 Miniature Circuit Breaker
M
L8/L9
SSNA9000
• Manual motor controllers (UL508-E)
➌
➍
Circuit
Protection
➏ Power Transformer Fuse/Branch Circuit Protection
M35
Series L8 and L9
Defining Electrical Standards Relating to Protection Devices
Circuit protection devices should be applied in accordance with the
product specifications, as well as local and national electrical codes.
Sprecher+Schuh protection devices offer equipment manufacturers a
product that meets both US and international protection standards.
A variety of Sprecher+Schuh Protection Devices are approved by
Underwriters Laboratory’s standards and are applicable for use under
the guidelines of the National Electric Code (NEC). Internationally,
Sprecher+Schuh Protection Devices are CE marked and meet CSA and
IEC standards for worldwide acceptance.
Sprecher+Schuh Protection Devices are an excellent choice for a wide
variety of electrical protection circuits. See the listings below to gain a
broader understanding of additional electrical standards pertaining to
other types of circuit protection.
UL 508 Manual Motor Controllers
A manual motor controller is suitable for use as an ON/OFF (make/break) controller for motors and other loads. These devices also have an overload tripping function which must be
compliant with applicable tests for an overload relay. In addition, an
overload tripping device must operate independently of the manipulation
of the handle (trip free).
Products evaluated according to the Canadian Standards
Association (CSA), which are intended to protect branch circuits
in accordance with the Canadian Electric Code (CEC). The CSA C22.2
No. 5.1 standard is closely related to the UL 489 standard.
®
UL 1077 Supplementary Protection
UL recognized supplementary protectors evaluated according to UL 1077 standard. Supplementary protectors are intended
for use as overcurrent protection within an appliance or other electrical
equipment where branch circuit protectors shall not be used as substitutes for UL 489 branch circuit protective devices. General uses: control
circuit components such as relay coils, starter coils, timers and remote
solenoids... etc.; control transformers protection (primary & secondary);
sensitive internal electronic circuitry.
CSA C22.2 No. 235
The CSA C22.2 No. 235 Standard is closely related to the
®
UL 1077 Supplementary Protector standard.
IEC 60947-2 Standard
Electrical standards for industrial applications using circuit protection.
A listed Manual Motor Controller, additionally marked “Suitable as a
Motor Disconnect,” shall be permitted as a disconnecting means where
installed between the final motor branch-circuit short-circuit, transformer protection, device and the motor. General uses: control circuit,
transformer protection, motor loads, general use loads, lighting loads,
resistive loads.
Although Sprecher+Schuh Supplementary Protectors are not listed as
UL 508 manual motor controllers, Sprecher + Schuh offers our KT7
Motor Controller series, which does meet the UL 508 standard at a
competitive price.
UL 489 Branch Circuit Protection
Products UL Listed for Branch Circuit Protection, which are approved and evaluated according to the UL 489 Standard for
“Molded Case Circuit Breakers” (usually applicable at 240V maximum
when associated with Supplementary Protectors). General uses: Branch
Circuit Protection Device (BCPD), protect motor loads, protect external loads such as receptacles or HVAC & refrigeration equipment.
CSA C22.2 No. 5.1
L8/L9
SSNA9000
Circuit
Protection
M
M36
Series FH8
DIN-rail Mounted
Fuse Holders
Sprecher + Schuh’s FH8 Fuse Blocks
feature the latest enclosed design for
the ultimate in safety and convenience.
Built for control and power circuits,
the FH8 line is DIN-rail mountable,
compact and reliable. Both AC and
DC models are available, with and
without blown fuse indication.
The new design
standard for fuse block
overcurrent protection
Sized for many applications
FH8 Fuse Blocks are available in one,
two and three pole configurations for
the following fuse types:
•Class CC
•Midget; 1-1/2 x 13/32
•DC rated fuses up to 30A
•Class J 30A fuses
•Class J 60A fuses
All AC fuse blocks are rated to 600V,
with 12-72V AC/DC models available
for midget and Class CC fuses. All
devices carry a withstand rating to
200kA. Midget fuse blocks are rated to
50kA.
®
New enclosed design offers
many advantages
Unlike “open” fuse blocks of the past
that were extremely dangerous, the
enclosed design of the FH8 series
features IP2 dead-front construction
under IEC and DIN standards. In
operation, there is no access to live
fuses or fuse clips. With the flick of
a finger, fuse access is gained via a
levered compartment on the front
of the holder that isolates the fuse
from the line power. This makes fuse
changeout quick, easy, convenient...
and safe.
Other great features
The FH8 line is compact, saving up to
15% in panel space over conventional
fuse blocks. The entire line is also
DIN-rail mountable, resulting in
extra savings in panel building time.
All models are available with blown
fuse indication, saving time on
maintenance and troubleshooting.
The bodies are made up of tough and
durable polyamide, known for its
exceptional insulating properties.
International approvals
Class CC and J fuse holders are UL
listed for branch circuit protection in
electrical distribution systems. They
are excellent for small motor loads
and group protection of small motors.
Midget holders are UL recognized.
The entire line is CSA Approved
and carries the CE Mark for use in
international markets.
18mm
18mm
36mm
40mm
Midget
Class CC
Class J (30A)
Class J (60A)
(≈0.71")
(≈0.71˝)
(≈1.41˝)
(≈1.57˝)
M37
FH8
SSNA9000
Circuit
Protection
M
Series FH8 Fuse Holders
For Midget Fuses
DIN-rail Mounted Fuse Holders – Midget Fuses (1-1/2 x 13/32) ➊➋
2.51"
(64mm)
3.19" (81mm)
Three Pole
3.19" (81mm)
Ordering and
Technical
Information
2.51"
(64mm)
0.71" (18mm)
FH8-1PM30
FH8-1PM30-L
FH8-1PM30-D1
19
27
27
6
6
6
2.51"
(64mm)
1.41" (36mm)
Price Ea. Pkg
(Std Pkg) Qty Catalog Number
Catalog Number
Fuse Holder Without Blown Fuse LED
With Blown Fuse LED
12-72V AC/DC (with LED indicator)
Two Pole
3.19" (81mm)
One Pole
2.13" (54mm)
Price Ea. Pkg
FH8-2PM30
FH8-2PM30-L
38
57
3
3
FH8-3PM30
FH8-3PM30-L
See
page
A58
12
12
3F
3AF
See
Section
N
50
10
V7-EA35
V7-EAH35
Price Ea. Pkg
(Std Pkg) Qty
57
85
2
2
See
page
A58
12
12
See
Section
N
50
10
Accessories
DIN-rail
Top Hat, low profile (priced per rail)
Top Hat, high profile (priced per rail)
3F
3AF
End Anchors
DIN Rail — Normal Duty
DIN Rail — Heavy Duty
V7-EA35
V7-EAH35
See
page
A58
12
12
3F
3AF
See
Section
N
50
10
V7-EA35
V7-EAH35
Fuse Block Specifications
Approvals
®
Voltage Rating
600V AC/DC
600V AC/DC
600V AC/DC
600V AC/DC
30 A
30 A
30 A
30 A
30 A
30 A
#16–#4 AWG Cu
1.5…25mm2
#16–#4 AWG Cu
1.5…25mm2
#16–#4 AWG Cu
1.5…25mm2
#16–#4 AWG Cu
1.5…25mm2
#16–#4 AWG Cu
1.5…25mm2
#16–#4 AWG Cu
1.5…25mm2
Wire Strip Length
600V AC/DC
0.44" (11 mm)
0.44" (11 mm)
0.44" (11 mm)
Recommended Tightening Torque
18...22 lb-in. (2...2.5 Nm)
18...22 lb-in. (2...2.5 Nm)
18...22 lb-in. (2...2.5 Nm)
Working Voltage (indicating circuit)
FH8-1PM30-D1
110…600V AC/DC
12…72V AC/DC
110…600V AC/DC
~
110…600V AC/DC
~
Leakage Current (indicating circuit)
2mA
2mA
2mA
Withstand Rating
50kA
50kA
50kA
Fuse Type
Operating Temperature
Contact Material
Common Midget Fuse Applications
• Transformer secondary protection
• Supplemental protection of:
- Control circuits
- Lighting
- Solenoids
Midget fuses only ➊
–4°…+130°F (–20°…+55°C)
–4°…+130°F (–20°…+55°C)
–4°…+130°F (–20°…+55°C)
Silver, Ag
Silver, Ag
Silver, Ag
Typical Midget Fuse Dimensions ➊
SSNA9000
FH8
Circuit
Protection
M
®
600V AC/DC
Maximum Current
Wire Range (Rated Cross Section)
®
➊Fuses not offered by Sprecher + Schuh.
➋FH8 UL File E196851, CSA 236535
M38
For Class CC Fuses
DIN-rail Mounted Fuse Holders – Class CC Fuses ➊➋➌
2.51"
(64mm)
3.19" (81mm)
Ordering and
Technical
Information
2.51"
(64mm)
0.71" (18mm)
FH8-1PC30
FH8-1PC30-L
FH8-1PC30-D1
17
26
26
6
6
6
2.51"
(64mm)
1.41" (36mm)
Price Ea. Pkg
Catalog Number
With Blown Fuse LED
12-72V AC/DC (with LED indicator)
Three Pole
3.19" (81mm)
Two Pole
3.19" (81mm)
One Pole
2.13" (54mm)
Price Ea. Pkg
FH8-2PC30
FH8-2PC30-L
38
56
3
3
FH8-3PC30
FH8-3PC30-L
See
page
A58
12
12
3F
3AF
See
Section
N
50
10
V7-EA35
V7-EAH35
Price Ea. Pkg
(Std Pkg) Qty
57
85
2
2
See
page
A58
12
12
See
Section
N
50
10
Accessories
DIN-rail
3F
3AF
End Anchors
V7-EA35
V7-EAH35
See
page
A58
12
12
3F
3AF
See
Section
N
50
10
V7-EA35
V7-EAH35
Approvals
Voltage Rating
Maximum Current
®
600V AC/DC
600V AC/DC
600V AC/DC
600V AC/DC
600V AC/DC
30 A
30 A
30 A
30 A
30 A
600V AC/DC
30 A
#16–#4 AWG Cu
1.5…25mm2
#16–#4 AWG Cu
1.5…25mm2
#16–#4 AWG Cu
1.5…25mm2
#16–#4 AWG Cu
1.5…25mm2
#16–#4 AWG Cu
1.5…25mm2
#16–#4 AWG Cu
1.5…25mm2
0.44" (11 mm)
0.44" (11 mm)
0.44" (11 mm)
18...22 lb-in. (2...2.5 Nm)
18...22 lb-in. (2...2.5 Nm)
18...22 lb-in. (2...2.5 Nm)
FH8-1PC30-D1
110…600V AC/DC
12…72V AC/DC
110…600V AC/DC
~
110…600V AC/DC
~
Withstand Rating
Fuse Type
Contact Material
2mA
2mA
2mA
200kA
200kA
200kA
Class CC fuses only ➊
–4°…+130°F (–20°…+55°C)
–4°…+130°F (–20°…+55°C)
–4°…+130°F (–20°…+55°C)
Silver, Ag
Silver, Ag
Silver, Ag
Common Class CC Applications
• Control transformer protection
• Motor circuits
• Branch circuit protection
• Lighting loads
• General purpose loads
• Heating loads
Typical Class CC Fuse Dimensions ➊
M
➋All major fuse brands and current ranges have been evaluated for this fuse holder.
Due to the heat they generate, the following fuses must be derated:
Ferraz Shamut ATQR 1.25 I = 0.42 A max.
Ferraz Shamut ATQR 1.40 I = 0.47 A max.
➌FH8 UL File E196851, CSA 236535
FH8
SSNA9000
®
Circuit
Protection
Wire Strip Length
®
M39
For Class J Fuses, 30A
DIN-rail Mounted Fuse Holders – Class J Fuses, 30A ➊➋
2.76"
(70mm)
2.76"
(70mm)
1.41" (36mm)
Catalog Number
FH8-1PJ30
FH8-1PJ30-L
38
44
6
6
2.76"
(70mm)
2.83" (72mm)
Price Ea. Pkg
4.65" (118mm)
Ordering and
Technical
Information
With Blown Fuse LED
Three Pole
4.65" (118mm)
Two Pole
4.65" (118mm)
One Pole
4.25" (108mm)
Price Ea. Pkg
FH8-2PJ30
FH8-2PJ30-L
Price Ea. Pkg
(Std Pkg) Qty
79
91
3
3
FH8-3PJ30
FH8-3PJ30-L
118
136
2
2
See
page
A58
12
12
3F
3AF
See
page
A58
12
12
See
Section
N
50
10
V7-EA35
V7-EAH35
See
Section
N
50
10
Accessories
DIN-rail
3F
3AF
End Anchors
V7-EA35
V7-EAH35
See
page
A58
12
12
3F
3AF
See
Section
N
50
10
V7-EA35
V7-EAH35
Approvals
Voltage Rating
®
600V AC/DC
600V AC/DC
600V AC/DC
600V AC/DC
30 A
30 A
30 A
30 A
30 A
30 A
#14–#1 AWG Cu
2.5…50mm2
#14–#1 AWG Cu
2.5…50mm2
#14–#1 AWG Cu
2.5…50mm2
#14–#1 AWG Cu
2.5…50mm2
#14–#1 AWG Cu
2.5…50mm2
#14–#1 AWG Cu
2.5…50mm2
0.8" (20 mm)
0.8" (20 mm)
0.8" (20 mm)
31...35 lb-in. (3.5...4 Nm)
31...35 lb-in. (3.5...4 Nm)
31...35 lb-in. (3.5...4 Nm)
110…600V AC/DC
110…600V AC/DC
110…600V AC/DC
2.0 mA
2.0 mA
2.0 mA
Withstand Rating
Fuse Type
Contact Material
Circuit
Protection
FH8
600V AC/DC
Common Class J Applications
• Motor circuits
• Feeders and mains
• Lighting, heating and general loads
• Power transformers
• Control transformers
• Control circuits
200kA
200kA
200kA
Class J fuses only ➊
–4°…+130°F (–20°…+55°C)
–4°…+130°F (–20°…+55°C)
–4°…+130°F (–20°…+55°C)
Silver, Ag
Silver, Ag
Silver, Ag
Typical Class J (1-30A) Fuse Dimensions ➊
SSNA9000
Wire Strip Length
M
®
600V AC/DC
Maximum Current
®
➋FH8 UL File E196851, CSA 236535
M40
For Class J Fuses, 60A
DIN-rail Mounted Fuse Holders – Class J Fuses, 60A ➊➋
3.23"
(82mm)
3.23"
(82mm)
1.57" (40mm)
FH8-1PJ60
FH8-1PJ60-L
43
49
6
6
3.23"
(82mm)
3.15" (80mm)
Price Ea. Pkg
Catalog Number
4.65" (118mm)
Ordering and
Technical
Information
With Blown Fuse LED
Three Pole
4.65" (118mm)
Two Pole
4.65" (118mm)
One Pole
4.72" (120mm)
Price Ea. Pkg
FH8-2PJ60
FH8-2PJ60-L
Price Ea. Pkg
(Std Pkg) Qty
89
101
3
3
FH8-3PJ60
FH8-3PJ60-L
134
152
2
2
See
page
A58
12
12
3F
3AF
See
page
A58
12
12
See
Section
N
50
10
V7-EA35
V7-EAH35
See
Section
N
50
10
Accessories
DIN-rail
3F
3AF
End Anchors
V7-EA35
V7-EAH35
See
page
A58
12
12
3F
3AF
See
Section
N
50
10
V7-EA35
V7-EAH35
Approvals
Voltage Rating
®
600V AC/DC
600V AC/DC
600V AC/DC
600V AC/DC
60 A
60 A
60 A
60 A
60 A
60 A
#10–#1 AWG Cu
6…50mm2
#10–#1 AWG Cu
6…50mm2
#10–#1 AWG Cu
6…50mm2
#10–#1 AWG Cu
6…50mm2
#10–#1 AWG Cu
6…50mm2
#10–#1 AWG Cu
6…50mm2
600V AC/DC
0.8" (20 mm)
0.8" (20 mm)
0.8" (20 mm)
31...35 lb-in. (3.5...4 Nm)
31...35 lb-in. (3.5...4 Nm)
31...35 lb-in. (3.5...4 Nm)
110…600V AC/DC
110…600V AC/DC
110…600V AC/DC
2.0 mA
2.0 mA
2.0 mA
Withstand Rating
200kA
200kA
200kA
Fuse Type
Contact Material
Common Class J Applications
• Motor circuits
• Feeders and mains
• Lighting, heating and general loads
• Power transformers
• Control transformers
• Control circuits
–4°…+130°F (–20°…+55°C)
–4°…+130°F (–20°…+55°C)
–4°…+130°F (–20°…+55°C)
Silver, Ag
Silver, Ag
Silver, Ag
Typical Class J (31-60A) Fuse Dimensions ➊
M
Circuit
Protection
Wire Strip Length
➋FH8 UL File E196851, CSA 236535
FH8
SSNA9000
®
600V AC/DC
Maximum Current
®
M41
Fuse Block Selection Guide
Control Transformers - Primary ➊
Transformer
VA
50
100
150
200
250
300
500
1000
1500
2000
3000
5000
7500
10000
Max.
Fuse
Value
Block
208V
1.125
2.25
3.5
4.5
6.0
7.0
6.0
12.0
17.5
20.0
35.0
60.0
~
~
30A
30A
30A
30A
30A
30A
30A
30A
30A
30A
60A
60A
~
~
Max.
Fuse
Value
Block
240V
1.0
2.0
3.0
4.0
5.0
6.25
5.0
10.0
15.0
20.0
30.0
50.0
~
~
30A
30A
30A
30A
30A
30A
30A
30A
30A
30A
60A
60A
~
~
Max.
Value
Fuse
Block
480
0.5
1.0
1.5
2.0
2.5
3.0
5.0
5.0
7.5
10.0
15.0
25.0
35.0
50.0
30A
30A
30A
30A
30A
30A
30A
30A
30A
30A
30A
30A
60A
60A
Max.
Fuse
Value
Block
575V
0.4
0.6
1.25
1.6
2.0
2.5
4.0
8.0
6.25
8.0
12.0
20.0
30.0
40.0
30A
30A
30A
30A
30A
30A
30A
30A
30A
30A
30A
30A
60A
60A
Control Transformers - Secondary
Transformer
Max.
Value
VA
Fuse
Block
24V
50
100
150
200
250
300
500
1000
1500
2000
3000
5000
7500
10000
3.2
6.25
10.0
12.0
15.0
20.0
30.0
60.0
~
~
~
~
~
~
30A
30A
30A
30A
30A
30A
30A
60A
~
~
~
~
~
~
Max.
Fuse
Value
Block
120V
0.6
1.25
2.0
2.5
3.2
4.0
6.25
12.0
17.5
25.0
35.0
60.0
~
~
30A
30A
30A
30A
30A
30A
30A
30A
30A
30A
60A
60A
~
~
The Maximum Values listed in the tables are calculated from the following
procedures, which can be found in the NEC . Always compute the Max. Value
for your specific application prior to selecting a fuse block.
Calculating NEC Maximum Values
Selecting the proper fuse block current ratings for the primary and secondary protection
of control transformers (per UL/NEC) is as follows:
Primary Overcurrent Protection for Control Transformers
Control Circuits: If the rated primary current is less than 2 amps, the maximum
rating of the overcurrent device is 500%. If the rated primary current is more than 2
amps, the maximum rating of the overcurrent device is 250%.
Secondary Overcurrent Protection for Control Transformers
Control Circuits: If the rated secondary current is less than 9 amps, the maximum rating of the overcurrent device is 167%. If 9 amps or more, the maximum rating of the
overcurrent device is 125%. The next larger size of an overcurrent device may be used
if 125% does not correspond to a standard size.
Reference: UL 508 19.3, NEC 430-72(c) exception No. 2, 450-3(b) 1 & 2
Primary Fuse Block Selection Example:
1000VA Transformer
480V Primary
1000/480 = 2.08 Amps [May increase by 250% if above 2A] 2.08 x 250% = 5.21 Amps Select 30A FH8 Class CC fuse block for 5A Class CC Fuse
SSNA9000
Secondary Fuse Block Selection Example:
5000VA Transformer
120V Secondary 5000/120 = 41.7 Amps [May increase by 125% if above 9A]
41.7 x 125% = 52.1 Amps Select 60A FH8 Class J fuse block for 50A Class J Fuse
Circuit
Protection
M
FH8
➊Class CC and Class J fuses may be used for Primary Protection,
contact fuse manufacturer for specific use.
M42
Fuse Block Selection Guide
Three Phase Motor Loads ➊➋➌
Horsepower
FLA
Fuse
Block
FLA
208V
Fuse
Block
FLA
240V
Fuse
Block
FLA
480V
Fuse
Block
575V
1/2
2.4
30A
2.2
30A
1.1
30A
0.9
30A
3/4
3.5
30A
3.2
30A
1.6
30A
1.3
30A
1
4.6
30A
4.2
30A
2.1
30A
1.7
30A
1-1/2
6.6
30A
6.0
30A
3.0
30A
2.4
30A
2
7.5
30A
6.8
30A
3.4
30A
2.7
30A
3
10.6
30A
9.6
30A
4.8
30A
3.9
30A
5
16.8
30A
15.2
30A
7.6
30A
6.1
30A
7-1/2
24.2
60A
22.0
60A
11.0
30A
9.0
30A
10
30.8
60A
28.0
60A
14.0
30A
11.0
30A
15
~
~
42.0
60A
21.0
30A
17.0
30A
20
~
~
~
~
27
60A
22.0
60A
25
~
~
~
~
34
60A
27.0
60A
30
~
~
~
~
40
60A
32.0
60A
40
~
~
~
~
~
~
41.0
60A
Single Phase Motor Loads ➊➋➌
Horsepower
Fuse
Block
FLA
FLA
115V
Fuse
Block
230V
1/6
4.4
30A
2.2
30A
1/4
5.8
30A
2.9
30A
1/3
7.2
30A
3.6
30A
1/2
9.8
30A
4.9
30A
3/4
13.8
30A
6.9
30A
1
16
30A
8
30A
1-1/2
20
30A
10
30A
2
24
60A
12
30A
3
34
60A
17
30A
5
~
~
28
60A
7-1/2
~
~
40
60A
10
~
~
50
60A
Circuit
Protection
➊Fuse block size is based on Class J Type time-delay fuses for typical motor
acceleration up to 5 seconds. Limited use of Class CC fuse blocks may be used for
motor loads, contact fuse manufacturer for acceptance.
➋FLA Data is in accordance with UL-508 Table 42.2 & NEC Tables 430-148 & 150.
➌Selection of fuse block should be based on selected fuse manufacturer data.
FH8
SSNA9000
M
M43
Notes
FH8
SSNA9000
Circuit
Protection
M
M44

Circuit Protection

Transcription

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