Discuss Contactor wiring, break ring circuit through a stop button in the UK Electrical Forum area at ElectriciansForums.net
Why not use a latch off-key reset stop switch. ?Hi guys , I have to break a ring circuit through a contactor with an emergency stop button .. just want to double check my wiring in the diagram is correct .. haven’t done much of this sort of work so any feedback is appreciated.View attachment 108600
It is a stop button that needs a key to disengage it againWho has decided the Circuit needs an E.M stop and what is the reason for this decision?
Has whoever made the decision thought of the consequences of the EM stop being reset and whatever is plugged in suddenly starting up?
As it would be on 13amp sockets, anything in the future could be plugged in and subject to uncontrolled restart.
Normally anything under Em Stop control would have individual no volt release protection to stop the above happening.
It’s more that when it’s disengaged it turns on again anything plugged in e.g an angle grinder could unexpectedly start up. There is stuff in regs about avoiding rotating machines starting without warning.It is a stop button that needs a key to disengage it again
Hi guys , I have to break a ring circuit through a contactor with an emergency stop button .. just want to double check my wiring in the diagram is correct .. haven’t done much of this sort of work so any feedback is appreciated.View attachment 108600
Why not use a latch off-key reset stop switch. ?
Why ?That would still need a seperate reset control.
If someone is silly enough to leave the key in after going to all the trouble of fitting a key to reset stop.There's a big issue with the key reset type of E-stop in that human nature is to leave the key in it so that you don't loose it. This means the button can't be as easily operated as it should be.
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