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Compact® NSF and NSJ 150 to 600 A Circuit Breakers
Section 4—Trip Units
© 1995–2003 Schneider Electric All Rights Reserved
10
SECTION 4—TRIP UNITS
TRIP UNITS FOR COMPACT
®
NSF150 AND NSF250 CIRCUIT BREAKERS
Compact NSF150 and NSF250 circuit breakers are equipped with thermal-magnetic (TM) trip units.
Protection • Against overload (1) with a fixed thermal protection
• Against short circuits (2) with fixed (on NSF150) or adjustable (on NSF250) magnetic protection
Trip Units for Compact
®
NSF150–NSF250
Circuit Breakers
TM15DP–TM250DP Trip Units
Rating (A) In
40° C 152030405060708090100125150 175200225250
3P 50° C 14.2 19 28.5 38 47.5 57 66.5 76 85 95 118 142 166 190 213 237
4P3T 60° C 13.5182736455463728190112 135158180203225
4P4T 70° C 12.8 17 25.6 34.2 43 51 60 68 77 85 107 128 150 171 192 214
Circuit Breaker
Compact
®
NSF150 N/H ■■■■■■■■■■■ ■
Compact
®
NSF250 N/H ■■■■
TM100OSN–TM150OSN Trip Units
Phase Neutral Phase Neutral Phase Neutral
Rating (A) In
40° C 100 150 125 250 150 250
4P OSN 50° C 95 142 118 237 142 237
60° C 90 135 112 225 135 225
70° C 85 128 107 214 128 214
Overload Protection
Thermal
3P Non-adjustable
4P3T
Non-adjustable, No Neutral Protection
4P4T
Non-adjustable
4P OSN*
Non-adjustable
Short-circuit Protection
Magnetic
Non-adjustable Adjustable
Compact
®
NSF150 400 500 1000 1250 1500
Compact
®
NSF250 5–10 x In
Neutral Protection
4P3T No Neutral Protection
4P4T 1000 1250 1500 5–10 x In
4P OSN*
1000 1250 1500
*Oversized Neutral
I
t
0
2
Ir Im
1
Ir
x 250 A
7
6
Ir Im
8
Im
TM 250 D
250A / 40°C
250 A
9
10
5
21
06153064