Specifications

8
COMPACT
®
NS circuit breaker
COMPACT
®
NS circuit breaker: functions and characteristics
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.
E28020
Trip units for COMPACT
®
TM15DP to TM250DP trip units
NSF150 to NSF250 circuit breakers
Rating (A) In 40°C 15 20 30 40 50 60 70 80 90 100 125 150 175 200 225 250
50°C 14.2 19 28.5 38 47.5 57 66.5 76 85 95 118 142 166 190 213 237
60°C 13.5 18 27 36 45 54 63 72 81 90 112 135 158 180 203 225
70°C 12.8 17 25.6 34.2 43 51 60 68 77 85 107 128 150 171 192 214
For circuit breaker COMPACT
®
NSF150 N/H ■■■■■■■■■■■■
COMPACT
®
NSF250 N/H ■■■■
Overload protection
Thermal non-adjustable
Short-circuit protection
Magnetic non-adjustable adjustable
COMPACT
®
NSF150 400 500 1000 1250 1500
COMPACT
®
NSF250 5–10 In
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