Data Bulletin How to Determine Circuit Breaker Ampere Rating Class 0600
Transcription
Data Bulletin How to Determine Circuit Breaker Ampere Rating Class 0600
0613DB0301 R12/12, 12/2012 Data Bulletin Replaces 0613DB0301 R11/11 How to Determine Circuit Breaker Ampere Rating Circuit Breakers Equipped with Micrologic™ Trip System Class 0600 Micrologic™ Trip Units Types 3.2 (S), 3.3(S), 5.2, 5.3, 6.2, and 6.3—Used With PowerPact™ H-, J- and L-Frame Circuit Breakers Ampere rating (Ir) is set by the Ir dial (Figure1, A) on the face of the trip unit. The maximum Ir setting corresponds to the sensor rating In (B). Ampere rating Ir can be adjusted in 1 ampere increments on 5.2, 5.3, 6.2 and 6.3 trip units using the keypad (C). Figure 1: Micrologic 3.2(S), 3.3(S), 5.2, 5.3, 6.2 and 6.3 Trip Units Micrologic 3 Electronic Trip Unit In=60A B 06113984 A 3.2 30 35 40 25 45 20 50 In Rating 15 60 Ir (A) 4 8 16 2 1 .5 A 15A 30 25 20 15 3 4 2 1.5 16 tr @ 6 Ir Micrologic 5 Electronic Trip Unit Trip Unit 16 4 6 8 3 2 tr 10 12 1.5 15 Ii (x In) In=60A Ir Ii B 35 40 45 50 60 6 8 10 12 15 Ii (x In) A. Ampere rating Ir dial B. Sensor rating In Per the National Electrical Code 240.6(C) a circuit breaker that has restricted access to the adjusting means shall be permitted to have an ampere rating that is equal to the adjusted long-time pickup setting. Restricted access is defined as: (1) removable and sealable covers over the adjustment means, (2) bolted equipment enclosure doors, (3) locked doors accessible only to qualified personnel. Sealable covers are provided using an optional wire seal (catalog no. MICROTUSEAL). Wire seal Ground-Fault Setting The Micrologic 6 trip unit incorporates ground-fault protection; both pickup and time delay can be adjusted. Set the ground-fault protection pickup Ig using the keypad. Set Ig to the exact value required (in steps of 0.05 In from 0.2 x In to 1.0 x In for 100–600 A and 0.3 x In to 1.0 x In for 60 A). Set the time delay tg using the keypad. Use the same setting for selecting option I2t ON. Set tg to the desired value (0.0 s, 0.1 s, 0.2 s, 0.3 s, or 0.4 s with or without I2t ON). © 2003–2012 Schneider Electric All Rights Reserved ™ How to Determine Circuit Breaker Ampere Rating 0613DB0301 R12/12, 12/2012 Micrologic™ Trip Units Types 3.0, 3.0A, 5.0, 5.0A, 5.0P, 5.0H, 6.0A, 6.0P, 6.0H—Used With Masterpact™ NT and NW and PowerPact™ M-, P-, and R-Frame Circuit Breakers Adjustable Rating Plug Typically the A rating plug is supplied as standard equipment with factoryinstalled trip units. See Table 1 for other available rating plugs and settings. 06133208 Table 1: Wire seal In Rating Adjustable Rating Plug Selection Rating Plug Long-time Pickup Settings A 1.0 0.90 0.80 0.70 0.63 0.60 0.50 0.45 0.40 B 1.0 0.95 0.88 0.75 0.63 0.56 0.50 0.44 0.40 C 1.0 0.95 0.83 0.75 0.67 0.58 0.53 0.50 0.42 D 1.0 0.95 0.93 0.90 0.80 0.70 0.64 0.48 0.40 E 1.0 0.95 0.93 0.90 0.85 0.80 0.75 0.70 0.60 F 1.0 0.98 0.96 0.94 0.92 0.90 0.88 0.86 0.84 G 0.82 0.80 0.78 0.76 0.74 0.72 0.70 0.68 0.66 H 0.64 0.62 0.60 0.58 0.56 0.54 0.52 0.50 0.48 To determine ampere rating (Ir), multiply sensor rating (In) by the long-time pickup setting. For example: • • • In = 2000A Long-time pickup setting = 0.70 Therefore Ir = 2000A x 0.70 = 1400A Per the National Electrical Code 240.6(C) a circuit breaker that has restricted access to the adjusting means shall be permitted to have an ampere rating that is equal to the adjusted long-time pickup setting. Restricted access is defined as: (1) removable and sealable covers over the adjustment means, (2) bolted equipment enclosure doors, (3) locked doors accessible only to qualified personnel. A flip down cover is provided to protect the rating plug and long-time pickup setting adjustment. To seal the trip unit, a wire seal is required. Ground-Fault Setting To determine ground-fault setting, multiply sensor plug rating (In) by the ground-fault pickup setting. For example: • • • In = 2000A Ground-fault pickup setting = 0.30 Therefore ground-fault setting = 2000A x 0.30 = 600A NOTE: Changing the rating plug or long-time setting will not affect groundfault pickup level. For trip units equipped with ground-fault protection for equipment, the test push button used for electronic testing of ground-fault protection is located above the test connector. For other ground-fault current test procedures, consult the trip unit instruction bulletin. 2 © 2003–2012 Schneider Electric All Rights Reserved 0613DB0301 R12/12, 12/2012 How to Determine Circuit Breaker Ampere Rating Series B Micrologic Trip Units— Used with LX, LXI, and LE Circuit Breakers 06023008 Rating Plug NOTE: Frame size is not sensor size. For example, an LEL circuit breaker can have a sensor rating of 250, 400, or 600 amperes. Table 2: Interchangeable Rating Plug Kits Catalog No. Rating Plug Multiplier Value ARP040 0.400 ARP050 0.500 ARP056 0.563 ARP058 0.583 ARP060 0.600 ARP063 0.625 ARP067 0.667 ARP070 0.700 ARP075 0.750 ARP080 0.800 ARP083 0.833 ARP088 0.875 ARP090 0.900 ARP100 1.000 Determine sensor rating from label on circuit breaker face. Ampere rating = sensor size x rating plug multiplier x long-time pickup setting .75 RATING PLUG .8 .9 .7 CAT NO. : ARP100 Max. Ampere Rating (P) = Sensor (S) x 100% .95 .6 .5 1.0 PICKUP x P AMMETER / TRIP INDICATOR PHASE SELECT 4 7 SHORT TIME I2 t OUT P H INDICATOR A RESET S E Press and Hold for Ammeter Reset % of Rating 6 8 4.5 ----0 20 40 60 80 2 100 .5 10 3 DELAY 8 I2 t IN 2.5 PICKUP x P .25 .2 INSTANT. .2 .2 .1 .1 .45 .3 8 OFF .55 .65 .75 PICKUP GROUNDAUL F T .5 .32 12 14 SEC. AT 6xP .35 7 3 I 2 t OUT .5 .32 6 4 6 2 PICKUP x P LONG TIME 5 5 3 2.5 2 I t IN .5 .32 .32 .2 .2 .1 .1 DELAY DELAY SEC. AT 12 x P SEC. AT 1xS FLASH=90% ON = OVERLOAD micrologic FULL-FUNCTION SERIES B Wire Seal Ground-Fault Setting Per the National Electrical Code 240.6(C) a circuit breaker that has restricted access to the adjusting means shall be permitted to have an ampere rating that is equal to the adjusted long-time pickup setting. Restricted access is defined as: (1) removable and sealable covers over the adjustment means, (2) bolted equipment enclosure doors, (3) locked doors accessible only to qualified personnel. Sealable covers are provided using an optional wire seal (catalog no. MICROTUSEAL). Two seals are required per circuit breaker, one for the rating plug and one on the clear trip adjustments cover. To determine ground-fault setting multiply sensor size (In) by the groundfault pickup setting. NOTE: Ground-fault pickup level is not a function of rating plug or long-time setting, only sensor rating. An optional ground-fault test panel is available. For other ground-fault system field testing, consult the circuit breaker instruction bulletin. © 2003–2012 Schneider Electric All Rights Reserved 3 How to Determine Circuit Breaker Ampere Rating Data Bulletin Schneider Electric 3700 Sixth St. SW Cedar Rapids, IA 52404 USA 1-888-778-2733 www.schneider-electric.us 4 0613DB0301 R12/12, 12/2012 Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material. Square D™, Schneider Electric™, Micrologic™, PowerPact™, and Masterpact™ are trademarks or registered trademarks of Schneider Electric. Other trademarks used herein are the property of their respective owners. © 2003–2012 Schneider Electric All Rights Reserved