Instruction Leaflet IL0102002E
Effective April 2018
Ring Main Unit Operation Instruction
23EATON CORPORATION www.eaton.com
Chapter 4 Operation
1. Load switch cabinet
1.1. Operating interface description
Voltage presence indicator
* Fault indicator
* Ammeter, voltmeter
SF6 gas pressure meter
* Opening button/opening state indicator
* Closing button/closing state indicator
Main bus mimic line
Ground switch close/open operation hole
Load switch closing operation hole
Load switch open/close state indication
Ground switch open/close state indication
Branch bus mimic line
Cable compartment door interlocking device
Voltage presence indicator mark
Padlock latching position
Note: * is optional and can be equipped as per the customer’s request.
Load switch Ground switch Cable compartment door
Closed Locked Locked
Opened Not locked Locked
Locked Closed Not locked
Not locked Opened Locked
Locked Locked Open
Locked Not locked Close
1.2. Interlock description
The load switch cabinet offers the following question-and-answer mechanical interlock.
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