Relay And Current Transformers For Relay Protection - ABB SafeRing 36 Installation And Operating Instructions Manual

60
130
Installing current transformers. The cable shielding is led back
through the centre hole and earthed
V-module with protection relay type REF610 in integrated LV-
compartment with hinged door
4.3 RELAY AND CURRENT TRANSFORMERS
A protection relay is installed in each vacuum circuit-breaker
module. The cables from the protection relay to the current
transformers are installed from the factory, and end up in the
cable compartment, ready for connection to the three current
transformers supplied.
Before installation:
− Check that the three current transformers have been
− Check that the current transformers are of the correct type,
Each current transformer must be mounted onto its high
130 voltage cable before the cable termination is fitted.
The earth shield on the cable must be led back through the
centre hole in the current transformer (see figure on left) and
earthed on the earthing bar in the cable compartment.
A mounting plate for the current transformers is fitted in the
cable compartment.
After the current transformers have been installed in the unit,
the cables from the protection relay are connected. Consult
the manual supplied with the protection relay for a description
of the connections.
SafeRing / SafePlus with vacuum circuit-breakers are
prepared for self-powered OCEF protection relay ABB type
REJ 603.
Relays with auxiliary voltage
SafePlus can be delivered with advanced protection relays:
− REF610 (integrated LV-compartment with hinged door)
− REF615 (high LV-compartment with hinged door)
− REF630 (high LV-compartment with hinged door)
− REF541 (high LV-compartment with hinged door)
− REF542+ (high LV-compartment with hinged door)
Separate manuals with examples of settings
have been prepared for each of these protection relays.
delivered and that they are all of the same type.
with the correctly rated transformer ratio, for the distri-
bution transformer's rated current and for the adjustment
range on the protection relay (see protection relay manual).
Installation and operating instruction | SafeRing/SafePlus 36kV 13