Specifications

50
COMPACT
®
NS circuit breaker
COMPACT
®
NS circuit breaker: supplementary technical information
Trip curves
Trip units for COMPACT
®
NSJ400–NSJ600 circuit breakers
STR23SP STR53UP
E28297
E38878
Reflex tripping: see page 51
STR53UP ground-fault protection
E38840
10 000
5 000
2 000
1 000
500
200
100
50
20
10
5
2
1
.5
.2
.1
.05
.02
.01
.005
.002
.001
.05 .07 .1 .2 .3 .4 .5 .7 1 2 3 5 7 10 20 30
t(s)
I / In
0.2
0.4
0.3
0.1
I
2
t ON
I
2
t OFF
Ig = 0.2–1 x In
10 000
5 000
2 000
1 000
500
200
100
50
20
10
5
2
1
.5
.2
.1
.05
.02
.01
.005
.002
.001
.5 .7 1 2 3 4 5 7 10 20 30 50 70100 200300
t(s)
I / Ir
I = 11 x In
Ir = 0.4–1 x In
Im = 2
–9 x Ir
reflex tripping :
t < 10 ms
10 000
5 000
2 000
1 000
500
200
100
50
20
10
5
2
1
.5
.2
.1
.05
.02
.01
.005
.002
.001
.5 .7 1 2 3 4 5 7 10 20 30 50 70100 200300
t(s)
I / Ir
Tsd = 0–0.3 s
reflex tripping :
t < 10 ms
Isd = 1.5
I
2
t = OFF
Isd = 1.5
I
2
t = ON
Ir = 0.4–1 x In
tr = 1–8 s (6Ir)
For hot start (0.9 x Ir) divide
max. time by 2, min. time by 4
Isd = 1.5–7 x Ir
Ii = 1.5–9 x in