Interlocks for VCB and Disconnector
The logic for operating the VCB and disconnector based on the current state of the unit is shown in the below Table – Ringmaster AirSeT Interlocks with VCB and Disconnector.
Ringmaster AirSeT Interlocks with VCB and Disconnector
|
Ringmaster AirSeT Interlocks with VCB and Disconnector |
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|---|---|---|---|---|---|---|---|---|
|
Logic position of functional unit |
Position before operation |
Operation wished |
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|
Disconnector |
VCB |
Close the disconnector |
Open the disconnector |
Close the E/S |
Open the E/S |
Close the VCB |
Open the VCB |
|
|
ON |
Closed |
Closed |
– |
– |
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|
OFF not disconnected |
Closed |
Open |
– |
– |
||||
|
OFF and disconnected |
Open |
Open |
– |
– |
– |
|||
|
Earthed |
Earthed |
Open |
– |
– |
||||
|
Earthed |
Earthed |
Closed |
– |
– |
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|
Free |
|
|
Locked |