1803   Mechanical Blocking of 3 way switches

Created: 06 Dec 2021

Status: Approval (Future Improvement)

Part: Part 7-4 (2020; Edition 2.1)

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Issue

Multi way switches like combined earthing / disconnecting switches may have a mechanical protection to prevent running of the switch too far. If that protection is activated, an alarm is generated.

Proposal

How shall such an Alarm be modeled? As combined switches are using two instances of an XSWI, in both of them?

Discussion Created Status
Change status to "FutureImprovement" 20 Dec 21 Approval (Future Improvement)
This question should be discussed within the planned revision of part 7-500. When TF7-500 comes with a recommendation, we coudl decide if a change or extension in 7-4 is needed.

I propose to go to "not applicable" with this tissue.
17 Dec 21 Triage

 

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