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A-36
Circuit breakers equipped with a control unit offering integrated
earth-leakage protection and an external rectangular sensor
Rated current (A)
630… 3200
Compact
NS630b to 1000 N/L
NS1600b to 3200
NS1250 and 1600 N
PB104844_ME
PB104845_SE
General circuit breaker characteristics
page A-12
Compact NS630b to 3200 circuit breakers are presented in the “Protection of
distribution systems” section.
Accompanying control units
page A-22
Micrologic 7.0 A electronic control units offer earth-leakage protection as standard.
Earth-leakage protection using a Vigirex relay
Earth-leakage relay
Separate toroids
Rectangular sensors
PB100435_16_SE
051352_32_SE
06133779A
Compact circuit breaker + Vigirex relay combination
Vigirex relays may be used to add external earth-leakage protection to Compact NS
circuit breakers. The circuit breakers must be equipped with an MN or MX voltage
release. Vigirex relays are very useful when special time-delay or tripping-threshold
values are required, or when there are major installation constraints (circuit breaker
already installed and connected, limited space available, etc.).
Vigirex-relay characteristics:
rectangular sensors up to 3200 A
b
400 Hz distribution systems.
b
Options:
trip alarm by a fail-safe contact
b
pre-alarm LED and contact, etc.
b
Compliance with standards:
IEC 60947-2, appendix M
b
IEC/EN 60755: general requirements for residual current operated protective
b
devices
IEC/EN 6100-4-2 to 4-6: immunity tests
b
CISPR11: radio-frequency radiated and conducted emission tests
b
UL1053 and CSA22.2 No. 144 for RH10, RH21 and RH99 relays at supply
b
voltages up to and including 220/240 V.
Functions and characteristics
Earth-leakage protection
Overview of solutions
Earth-leakage protection is obtained by:
b
installing a Micrologic 7.0 A control unit
(Compact NS630b to 3200)
b
using a Vigirex relay and separate sensors
(all Compact circuit breakers).