Eaton RVAC - Page 27

Instruction Leaflet IL0102002E
Effective April 2018
Ring Main Unit Operation Instruction
27EATON CORPORATION www.eaton.com
3.3. Operating instruction
a). Close the cable compartment door, and unlock the operation of
the ground switch;
b). Push open the ground switch operating hole latching panel to
the right, open the ground switch operating hole, insert the
handle into the ground switch operating hole, rotate the handle
clockwise to open the ground switch, and pull out the operating
handling after operation;
c). Push open the disconnecting switch operating hole latching
panel to the left, open the disconnecting switch operating hole,
insert the handle into the disconnecting switch operating hole,
rotate the handle clockwise to close the switch, and pull out
the operating handling after operation;
d). Push open the circuit breaker charging operation hole latching
panel to the left, open the circuit breaker charging operation
hole, insert the handle into the circuit breaker charging
operation hole, rotate the handle clockwise to charge the circuit
breaker;
e). Open the circuit breaker closing operation button cover, press
down the closing operation button to close the circuit breaker,
and put back the operation button cover after operation;
f). Open the circuit breaker opening operation button cover, press
down the opening operation button to open the circuit breaker,
and put back the operation button cover after operation;
g). Push open the disconnecting switch operating hole latching
panel to the left, open the disconnecting switch operating hole,
insert the handle into the disconnecting switch operating hole,
rotate the handle counter-clockwise to open the switch, and
pull out the operating handling after operation;
h). Push open the ground switch operating hole latching panel to
the right, open the ground switch operating hole, insert the
handle into the ground switch operating hole, rotate the handle
counterclockwise to close the ground switch, and pull out the
operating handling after operation;
i). Lift up the lock catch of the interlocking device to lock the
operation of the ground switch, and open the cable
compartment door;
WARNING
IT IS FORBIDDEN TO CONDUCT OPENING AND CLOSING OPERATIONS
ON THE DISCONNECTING SWITCH WHEN LOADED! MAKE SURE TO
CONFIRM THE STATUS OF THE CIRCUIT BREAKER FIRST PRIOR TO ANY
OPERATION DURING RUNNING. ONLY WHEN THE CIRCUIT BREAKER IS
IN OPENING STATE, THE DISCONNECTING SWITCH CAN BE OPERATED
ON.
WARNING
IT IS STRICTLY PROHIBITED TO CLOSE THE GROUND SWITCH AND OPEN
THE CABLE COMPARTMENT DOOR WHEN THE CABLE HEAD IS
ENERGIZED.
WARNING
FOR THE OPERATION OF ANY CABINET TYPE, MAKE SURE TO CONFIRM
THE CURRENT STATUS INDICATION OF THE SWITCH PRIOR TO AND
AFTER THE OPERATION, TO AVOID UNNECESSARY MAL-OPERATION.
WARNING
THE RUM OFFERS MECHANICAL INTERLOCKING FUNCTION, FOR
SATISFACTION OF THE REQUIREMENTS OF THE INTERLOCKING
CONDITIONS, WITH MECHANICAL FORCED LATCHING. NO OPERATION
SHALL BE FORCED WHEN IT IS DIFFICULT TO CONDUCT. OTHERWISE,
THIS CAN EASILY CAUSE EQUIPMENT DAMAGE AND EVEN ACCIDENTS.
3.2. Interlock description
Circuit breaker Disconnecting switch Ground switch Cable compartment door
Closing Locked Locked Locked
Opening Not locked Locked Locked
Not locked Opening Not locked Locked
Not locked Locked Closing Not locked
Not locked Not locked Closed Locked
Not locked Locked Locked Open
Not locked Locked Not locked Close