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6
Protection of distribution
systems
Overview of solutions
Protection of distribution systems means protection of:
b
systems supplied by a transformer
b
systems supplied by an engine generator set
b
long cables in IT and TN systems.
Power distribution
Selection of circuit breakers from 630 to 3200 Apage A-10
Rated current (A)
250 … 320 … 400 … 500… 640…
630
800
1000 1250 1600
Compact
NS630b NS800 NS1000 NS1250 NS1600
Breaking capacity
N
50
50
50
50
50
(kA rms)
H
70
70
70
70
70
380/415 V
L
150
150
150
-
-
LB 200
200
-
-
-
Rated current (A)
640 … 800 ...
1000 … 1250 …
1600 2000 2500 3200
Compact
NS1600b NS2000 NS2500 NS3200
Breaking capacity
N
70
70
70
(kA rms)
H
85
85
85
380/415 V
Accompanying control units up to 3200 A page A-18
Micrologic electronic control units may be used on all Compact NS630b to NS3200 circuit
breakers and can be changed on site.
PB104845_ME
PB104844_ME
DB128023
Presentation
DB128021
DB128022
G