Relays; Additional Equipment; Low-Voltage Connections Auxiliary Contacts; Remote Control And Monitoring Unit - ABB SafeRing Installation And Operating Instructions Manual

SafeRing / SafePlus
SF 6 insulated ring main unit and compact switchgear
Installation and operating instructions
ABB / PTMV
5.4 RELEAYS
SafeRing / SafePlus with vacuum circuit breakers are prepared
for three different types of protection relays: SACE PR521,
Circutor, MPRB 99-1.0-GF and SEG WI1-3. All three types are
designed so that there is no need for external auxiliary voltage
for correct functioning.
Separate manuals have been prepared for each of these
protection relay, with examples of adjustments.
MPRB 99-1.0-GF and SEG WI1-3
These are simpler type of inverse-time protection relays, with
fixed settings specially developed for distribution
transformers.The MPRB 99-1.0-GF also have an earthfault
protection module.
SafePlus can be delivered with advanced protection relays. As
option SPAJ140 can be delivered and also other ABB relays
like REJ and REF can be fitted. This will require additional low
voltage compartment.
See separat documentation for these relays.

6. ADDITIONAL EQUIPMENT

6.1 LOW-VOLTAGE CONNECTIONS
AUXILIARY CONTACTS
(2NO+2NC) can be supplied to indicate switch positions on all
switches/breakers. Access to the low-voltage connections is
gained by removing the top front panel. A shunt trip coil (AC or
DC) can be fitted on the transformer switch/breaker.

6.2 REMOTE CONTROL AND MONITORING UNIT

SafeRing can be equipped with an integrated remote control and
monitoring unit (see picture left).
This unit is preengineered and can be delivered and installed as
a retrofit solution or complete from factory.
SafePlus can have the same equipment but need an additional
low voltage compartment on top of the switchgear.
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NOPOWSR 5976 GB