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Local isolator

MrJack96
Hi guys I’ve come across a local isolator that has been linked out for a motor but still can be isolated upstream. Trying to get my head around emergency switching and if a local isolator is the means of it. I always thought it was just e-stops where used for emergency switching. Guess my question is is it a big no no that’s this has been done? The isolator is getting replaced when the parts are in. 


cheers guys
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    A learning experience I had many years ago before the various standards existed or were enforced:

    Commissioning a control system for a customer installed rig that had lots of 9" and 6" pipework with various valves and a massive pump fed by a large water  tank with a 20ft head when one of the stop ends blew off. A large fountain started driven by the pump. In a panic I pressed the emergency stop. A big mistake as it also cut power to the control system and while the pump stopped the head of water coming through a 9" pipe fed an only slightly smaller fountain. With the power off I could not operate the valves which could be operated manually but the only manual control leaver was on a valve under the fountain. So I got wet!


    Shortly after the customer returned, he was not concerned and went away to get a three phase wet vacuum cleaner with a large 4ft high tank on it. I left him to sort out the pipework and drove home wet and wiser.


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  • 0
    A learning experience I had many years ago before the various standards existed or were enforced:

    Commissioning a control system for a customer installed rig that had lots of 9" and 6" pipework with various valves and a massive pump fed by a large water  tank with a 20ft head when one of the stop ends blew off. A large fountain started driven by the pump. In a panic I pressed the emergency stop. A big mistake as it also cut power to the control system and while the pump stopped the head of water coming through a 9" pipe fed an only slightly smaller fountain. With the power off I could not operate the valves which could be operated manually but the only manual control leaver was on a valve under the fountain. So I got wet!


    Shortly after the customer returned, he was not concerned and went away to get a three phase wet vacuum cleaner with a large 4ft high tank on it. I left him to sort out the pipework and drove home wet and wiser.


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