Square D Digest 179

MasterPacT™ NT/NW Circuit Breakers Class 613 / Refer to Catalog 0613CT0001

MasterPacT™ Power Circuit Breakers

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MasterPacT NT and NW Circuit Breakers

The MasterPacT NT and NW universal power circuit breakers offer a family of circuit protection products meeting the most common world standards, ANSI, UL and IEC. The basic design platform for each is common. The final result is UL, ANSI and IEC circuit breakers with the same basic external dimensions, features and accessories. • Complete product offering up to 200 k AIR without fuses • Circuit breakers tested to show arc flash hazard risk category as referenced by NFPA70E • 800 A to 6000 A frames, fixed and draw-out • Rated for AC voltage systems through 600 V (635 V ANSI) • Short-time withstand ratings up to 100 kA • Cradle position indicator: connected, test and disconnected • Simple, visual contact wear indicators • Full complement of field-installable accessories common to all standards • Four interchangeable MicroLogic trip units to choose from • Available PowerLogic™ based power metering and monitoring capabilities • Available protective relay functions as defined by ANSI C37.2 and C37.90 The following charts show the MasterPacT NW and NT ratings for ANSI and UL 489. See the Catalog 0613CT0001 .

MasterPacT NT

MasterPacT NW

Table 7.146: MasterPacT NW Circuit Breaker Ratings

ANSI C37 Certified/UL 1066 Listed

UL 489 Listed

4000/ 5000/ 6000A

Standard Frame Rating Interrupting Code

3200/4000 A [9]

800–1600A

2000A

4000/5000 A 800/1200/1600/2000 A 2500/ 3000A

L1 [10]

L1F [10] H1 H2 H3

L1 [10]

L1F [10] H1 H2 H3

L1 [10] H2 H3

L1 [10]

L [10]

LF [10]

L [10]

L [10]

N1 H1 H2 H3

N H

H

H

Interrupting Current (kARMS) 50/60Hz 240 Vac 42 65 85 100 200 200 65 85 100 200 200 65 85 100 200 85 100 200 65 100 200 200 100 200 100 200 480 Vac 42 65 85 100 200 200 65 85 100 200 200 65 85 100 200 85 100 200 65 100 150 150 100 150 100 150 600 Vac 42 65 85 85 130 130 65 85 85 130 130 65 85 85 130 85 85 130 50 85 100 100 85 100 85 100 Short-time Withstand Current (kA RMS) 42 65 85 85 30 22 65 85 85 30 22 65 85 85 100 85 85 100 42 [11] 65 [11] 30 22 65 65 85 100

[11] [12] [11] [12]

Built-in Instantaneous Override (kA RMS ±10%) Close and latch rating (kA RMS) Tested to show arc flash hazard risk category as referenced by NFPA70E

35 [13] 24 — — 85 35 24 — — 85117— —11740 40 35

35 [13]

35 [13]

35 [13]

85

24 65 65 75 75

42 65 40 40 25 22 65 40 40 25 22 65 40 40 40 85 75 40 40 40 25 [14]

22 40 40 40 40

—————Yes————Yes——————————Yes————

Breaking time Closing time

25–30 ms with no intentional delay (9 ms for L1, L1F, L and LF)

70ms

2000– 4000A 2500– 5000A 3000– 6000A 5,000

100–250A 400–800A 600–1200A 800–1600A 1000–2000 A 12,500 [15]

1200– 2500A 1600– 3000A

100–250A 400–800A 800–1600A

2000–4000 A 2500–5000 A

Sensor Rating

1000–2000 A

1600–3200 A

Endurance Rating (C/O

12,500

10,000

10,000

5,000

10,000

Mechanical

5k

Cycles) WithNo Mainte nance

2800 [15]

1,000

1,000

1,000

1,000

1,000

Electrical

2800

1k

[9] 4000 A standard width circuit breaker is not available in L1 interrupting rating code or drawout construction (fixed mounting only). [10] Drawout mounted only. [11] 24 kA RMS for 800 A circuit breaker frame with 100 A or 250 A sensor. [12] 65 kA RMS for 2000 A. [13] None except 24 kA RMS for 800 A circuit breaker frame with 100 A or 250 A sensor. [14] 40 kA RMS for 2000 A. [15] The endurance rating for 2000 A, N/H/L/LF is 10,000 for mechanical and 1000 for electrical.

CIRCUIT BREAKERS

7 MINIATURE AND MOLDED CASE

7-77

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