Instruction Leaflet IL0102002E
Effective April 2018
Ring Main Unit Operation Instruction
32 EATON CORPORATION www.eaton.com
WARNING
WHEN ANY INDICATOR ON THE NUMBER OF OPERATIONS OF THE
ELECTRICAL LIFE SPECIFIED IN THE ABOVE TABLE HAS BEEN REACHED,
THE DEVICE SHALL BE WITHDREW AND QUIT OPERATION.
2.4. Temporary maintenance
This refers to temporary maintenance on the parts necessary for
maintenance in the following cases:
When exceptional situation occurs;
When the high voltage switchgear has reached the specified
number of operations or the electrical life reaches relevant rules
shown in below table.
2.5. Testing after repair
Usually, inspections shall be conducted after the repair of the
RMU, including main circuit resistance measurement, seal
tightness test, and main circuit power frequency withstand voltage
test.
No. High voltage switch component name Operating conditions Specified number of operations
1 Load switch No-load operation
Breaking rated active load current
Breaking rated cable charging current
Closing short circuit fault
5,000 operations
2,00 operations
10 operations
5 operations
2 Ground switch No-load operation
Closing short circuit fault
2,000 operations
2 operations
To Next Page
Loading...
