Operation - ABB SafeRing Installation And Operating Instructions Manual

SafeRing / SafePlus
SF 6 insulated ring main unit and compact switchgear
Installation and operating instructions
Switch disconnector:
Close: Turn the operating handle clockwise.
Open: Turn the operating handle anti-clockwise.
Earthing switch:
Close: Turn the operating handle clockwise.
Open: Turn the operating handle anti-clockwise.
Switch fuse disconnector.
Close: Turn the operating handle clockwise to charge the
close/open spring. Then push the green button. (A)
Open: Push the red button. (B)
In circuit breaker configurations, the transformer circuit breaker
can be tripped by the protection relay, while in switch fuse
configurations fuse switch disconnector can be triggered by the
fuse striker pin if an over current or short-circuit occurs.
14
NOPOWSR 5976 GB

5.2 OPERATION

All switches can be operated with the included operating
handle.
Internal mechanical interlocking between the switch
disconnector/isolator and the associated earthing switches
prevents incorrect operation.
The isolator in the V-Module can only be opened after the
circuit breaker is opened. Then the circuit breaker can be
closed for testing purpose.The operation of the switch
disconnector/circuit breaker and earthing switches can be
further interlocked by means of a padlock. The earthing
switches are operated by a snap action mechanism, which
ensures fast closing.
The earthing switch is closed by turning the operating handle
clockwise. Turning the operating handle anti-clockwise opens
the switch.
For closing the switch fuse disconnector / circuit breaker the
spring mechanism must be charged. Turning the operating
handle clockwise does this. Then the green "on" button must be
pressed to close the switch/breaker.
An anti-reflex system, standard on all operating handles,
prevents the immediate re-operation of switches.
F-Module
Mechanical position indicators:
C: Switch fuse disconnector
E: Isolator closed
C
A
B
E
V-Module
D: Earthing switch closed
ABB / PTMV
D