MOTORTRONICS KOREA MOTORTRONICS KOREA

Mr. Wang-Soo Choi / MOTORTRONICS INTERNATIONAL KOREA
MOTORTRONICS KOREA
BASIC OF SOFTSTARTER
CONCEPT OF SOFTSTARTER
What’s soft-starter?
•
What’s soft-starter?
• Name : RVSS (Reduced Voltage Solid-State Devices)
• Description : A module to start a AC motor with SCR power electronics device.
•
Key Issue
g current of motor when starting
g and de-accerating.
g
• Limit a starting
• Save a cost of transformer, cable and other electrical units due to reduce
starting current.
• When reach rating speed of motor, Flow of current and voltage change from
soft-start to Bypass automatically.
BASIC OF SOFTSTARTER
Structure of softstarter
Power Network
Main contactor
Protection
module
SCR
BYPASS
MOTOR
소프트스타터 판넬
Type of soft-starter has been classificated by main
contactor.
1. SWG type – LOAD SWITCH installed
2. K type
yp – Onlyy VC
3. VCS type – Instead of VC, VCS installed
4. VCB type – VCB installed
BYPASS module is essential for HV softstarter.
When reach rating speed of motor, flow of current of
voltage has been changed from softstarter to bypass
automatically.
BASIC OF SOFTSTARTER
Key issue of softstarter
•
Best solution for starting AC motor with SCR technology.
•
Control factor
• INITIAL VOLTAGE
• RAMP TIME
• CURRENT LIMIT
•
Key
•
•
•
•
purpose
Protection motor
Monitoring status of motor
Control angle of phase
g motor
Effective starting
BASIC OF SOFTSTARTER
SCR device
•
•
•
Like a hockey puck
3 parts of ANODE, CATHODE, GATE
SCR is firing during GATE is open and close repeatedly.
ANODE
GATE
CATHODE
BASIC OF SOFTSTARTER
SCR STACK
•
SCR
SCR STACK is assembled by each SCR and mount
SOFTSTARTER PANEL.
BASIC OF SOFTSTARTER
HV SOFTSTARTER - MVC3 SERIES





MODEL : MVC3 SERIES
HV SOFTSTARTER
VOLT : 2.3 ~ 7.2 kV
POWER : 200 ~ 1,200 A
OVERLOAD CAPACITY
 500% 60sec or 600% 30sec
 TYPE




SWG type
K type
VCS type
VCB type
BASIC OF SOFTSTARTER
MVC3 - INSIDE
LOAD SWITCH or VCB
POWER FUSE
VACCUM CONTACTOR
FOR MAIN
VACCUM CONTACTOR
FOR BYPASS
CONTROL BOARD
Controls
SCR STACK
M
BASIC OF SOFTSTARTER
MVC3 - OUTDISE
LOAD SWITCH
KEYPAD
DOOR HANDLE
COLOUR : RAL7021
PANEL ENCLOSURE
IP41 (BASIC)
BASIC OF SOFTSTARTER
STARTING CURVE
Volt & Torque
100%
ACC mode
BYPASS operate
DEC mode
Start
DEC mode
Limit current
When starting
starting,
Torque level
STEP
DOWN
Voltage level
Stop voltage level
Starting motor
Rating speed of motor
Decelerate
D
l t
operating
Stop
DEC mode
MVC3 SERIES
TYPE OF MVC3 SERIES
Depend on Input style
1 SWG type
1.
•
LOAD SWITCH + POWER FUSE
2. K type
yp
•
•
There is no circuit breaker.
Only contactor (Vacuum contactor)
3 VCS type
3.
•
Instead of VC, VCS used.
4 VCB 타입
4.
•
Control
board
MTR
Instead of VCS, VCB used.
MVC3 SERIES
SWG TYPE
 TYPE : SWG type
 Configuration : LOAD SWITCH +
POWER FUSE
 ADVANTAGE
 Easy to disconnect supply power.
 VCB need in switch gear panel.
MVC3 SERIES
K TYPE
 TYPE : K type
 Configuration : Only VC
 ADVANTAGE




Low price.
Simple configuration.
Small size of panel.
VCB need in switch gear panel.
MVC3 SERIES
VCS TYPE
 TYPE : VCS type
 Configuration : VCS (draw type)
 ADVANTAGE
 Instead of VC, VCS used.
 Simple configuration.
 VCB need in switch gear panel.
MVC3 SERIES
VCB TYPE
 TYPE : VCB type
 Configuration : VCB (draw type)
 ADVANTAGE
 Instead of VC, VCB used.
 Simple configuration.
 No need VCB in switch gear panel.
BASIC OF SOFTSTARTER
ADVANTAGE OF SOFTSTARTER
1) When
h starting motor, Minimize starting current.
–
–
–
Minimize voltage drop for network
Protect network from starting current
Save a cost to make small size of transformer and cable
2) Best motor protection
–
–
Monitoring status of operating motor.
Detect short circuit, under voltage, overload, etc …
BASIC OF SOFTSTARTER
Minimize starting current
1)
2)
3)
4)
Limit starting current to 200~450% of rating current.
Save a cost due to make a small for transformer and cable.
cable
Minimize shock wave for mechanical part from quick stat and stop.
Save maintenance fee.
BASIC OF SOFTSTARTER
BEST PROTECTION FOR MOTOR
•
Best protection for motor
1)
2)
Monitoring
M
it i
status
t t off operating
ti
motor.
t
Protection function for motor and softstarter.
BASIC OF SOFTSTARTER
POSSIBLE PROTECTION
Protection for motor and softstarter
1
Overload (49)
11
Over Frequency Trip (81)
2
Over Current (51)
12
Power Factor Trip (55)
3
Over Voltage (59)
13
Motor Thermostat Trip
4
Under Voltage (27)
14
Starter Time Between, Starting per hour (66)
5
Short Circuit Trip
15
Locker /Starter Inhibit (86)
6
Current Unbalance Trip (46)
16
Instantaneous Electronic Over Current Trip
(50)
7
Phase Loss Trip
Trip, Phase Rotate Trip
(47)
1
17
Ground
d Fault
l / OPTION
8
Starter Over Temp
18
RTD Fault /12 channel / OPTION
9
Shorted SCR
10
Accel. Timeout Trip
MBASIC OF SOFTSTARTER
MONITORING FUNCTION
NO
MONITORING FUNCTION
1
R.S.T Phase Current.
2
(
), Percent of FLA.
AVG Current , Power Factor,, Ground Fault Current (OPTION),
3
R.S.T Phase Voltage.
4
KW ,KVA ,KWH ,PF.
5
Thermal Data.
6
RTD Temp. (OPTION)
7
AVG Starting
g Time
8
AVG Starting Current
9
Peak on KVA
10
P k on KW
Peak
11
Peak on KVAR
12
Event Record 60 events
13
Last Trip
14
Statistic Trip Data
HV SOFTSTARTER – MVC3 SERIES
KEYPAD
 Main function



Parameter setting
Display status of operating motor
3 Non-volatile memory system
 RAM – system
t
operation
ti
 EPROM – factory default & DEFAULT
g
 EEPROM – User setting
 No need battery for backup
 REAL TIME CLOCK


보호기능 및 감시기능시 사용된
배터리 교환주기 : 10년+
BASIC OF SOFTSTARTER
Field bus communication
PLC or DCS
Field bus communication
 Basic
 RS485 Modbus RTU
 Option
 DrviceNet
 Profi-bus DP
 Other
BASIC OF SOFTSTARTER
M-LINK – PC based software
 M-LINK – monitoring software
PC WITH MONITOR PROGRAM
RS232




PC based software
Connect RS232 cable
Monitoring available
Programming available
BASIC OF SOFTSTARTER
Dimensioning softstarter
Pre-data for calculating power of softstarter
1.
2.
3.
4.
5
5.
Data of supply power
Curve for current, torque and speed of motor
Data of transformer
Length of cable between motor and softstarter
Type of application
- Pump, Fan, Compressor, Chiller, etc
REFERENCE CASE – NO. 1
Success Story - Pulper Motor
Problem
When starting motor, High current and High torque has
been taken to motor. Due to this, Connected belt was cut
frequently and Motor need to take Over haul with short
period.
Modification
Change to Soft Starter
Improvement
•
•
•
During 3 years, no belt problem.
During 3 years, no motor Over Haul
Minimum maintenance cost,
cost Maximum production
REFERENCE CASE – NO. 2
Success Story - Compressor Starter
Problem
When starting Compressor, Voltage drop was too high.
Because of voltage drop, Not easy to turn off and energy
lose is increased
increased.
Modification
Change to Soft Starter
Improvement
• During mealtime and break time,
time stop the compressor and
re-start (over 4 time per day)
• Saved energy : 9 - 11.5 %
REFERENCE CASE – NO. 3
Success Story - High Pressure Pump
Problem
Due to high starting current, Shaft connected motor and
load has been broken frequently and taking time too much
for repair.
repair
Modification
Change to Soft Starter
Improvement
Due to smooth starting, Save a maintenance cost because of
decrease a problem of shaft.
MOTORTRONICS INTERNATIONAL KOREA
Customer
THANK YOU
FOR
YOUR
O
ATTENTION!!
O