Recent content by Shaun_H26

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Trapped Key Isolation Failure

Thanks for your replies all of you. The original isolation method was a simple isolation handle on the panel such as like Cadgey said. However over time, a trapped key system was added to allow access via keyed doorways into the machine. This trapped key system main panel was added in-between...
- Shaun_H26
- Post #10
- Oct 6, 2017
- Forum: Electrical Wiring, Theories and Regulations
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Trapped Key Isolation Failure

The trapped key is used as a form of isolation, interrupting the power supply to the machine panel and the control circuit supply transformer. My concern was that it was in effect powering down the PILZ unit when used due to cutting both the control supply and main supply for the panel. I've...
- Shaun_H26
- Post #8
- Oct 5, 2017
- Forum: Electrical Wiring, Theories and Regulations
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Trapped Key Isolation Failure

Hi all. Can someone point me in the right direction for the current regulations on control panel isolation for machinery (industrial) if possible please? An issue arose with a machine trapped key system failing, allowing an individual to remove the key, but the machine staying live and...
- Shaun_H26
- Thread
- Oct 4, 2017
- failure isolation key
- Replies: 9
- Forum: Electrical Wiring, Theories and Regulations

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