Switchgear/Breaker – Manager
Notes on Special Switchgears
Combination of a Disconnector and an Earthing Switch
This switchgear is a combination of a disconnector and an earthing switch. This Switch switches between the »
ON-
Position«
(e.g. Busbar) and the »
Earthing-Position«
.
The Earthing position of a „Diconnector and Earthing“-Switchgear combination is shown
as „CB POS OFF“ within the SCADA documentation (register maps).
Three Position Disconnector
The “Three Position Disconnector" covers functional two switchgears. One switchgear corresponds to the
disconnector of the “Three Positon Disconnector”, and the second switchgear corresponds to the earthing switch.
The Single Line shows the current position of the “Three Position Disconnector". The separation into two
switchgears prevent unintentional direct switching from the »ON«-position via the »OFF«-position into the
»EARTH«-position. From security aspects there are two clear switch positions »Isolating« and »EARTH«.
Thanks to this separation, individual supervision and switching timers for the earthing and isolating part can be set.
In addition to that individual interlockings and device names (designations) can be set for the earthing and the
isolating part.
The Command Execution Supervision will issue the following message in case of a
switching attempt from the earthing position (directly) into the isolator position and vice
versa:
„CES SwitchDir“
The “Earth” position of a „Diconnector and Earthing“-switchgear combination is shown
as „CB POS OFF“ within the SCADA documentation (register maps).
528 MCDGV4 DOK-HB-MCDGV4-2E
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