Discuss Volt meter reading 760volts in 3phase dol starter overloads in the Electricians' Talk area at ElectriciansForums.net
I have had uk power networks out and they have checked their supply and all is fine. I can only seem to find this fault on these contactors because they are the only ones which have a neutral in the system for the pilot light. The main lighting and single phase sockets in the building have 242volts but obviously cannot test anything once load has been removed like I can on the three phase circuits.Have you verified the neutral St the distribution board.
Is anything else in the building suffering from a potentially floating neutral.
He is worried about this voltage.So what does the customer make of this
2 days in, a call out from the DNO and still no solution.
You say that the neutral is only at the contactor for a pilot light.
What goes to A2?
Is your plant a 3 phase ungrounded delta or is it a 4 wire y connection and is the line voltage 600 or 480Hi
I have been called out to a fault on a grain dryer where the motor interlocks are not disconnecting. Previous conveyors. Upon investigation I have found one starter that does not disconnect the preceding motor but when tripped I am getting 550v to earth from a1 and wait for it 760volts to phase from a1! This has baffled me as there's only 410v incoming.
Thoughts?
I don’t think it’s in the control aspect of it. You have a power problem not controlsIs your plant a 3 phase ungrounded delta or is it a 4 wire y connection and is the line voltage 600 or 480
Is your plant a 3 phase ungrounded delta or is it a 4 wire y connection and is the line voltage 600 or 480
Reply to Volt meter reading 760volts in 3phase dol starter overloads in the Electricians' Talk area at ElectriciansForums.net
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