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Discuss Volt meter reading 760volts in 3phase dol starter overloads in the Industrial Electrician Talk area at ElectriciansForums.net

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Hi

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?
 
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Pete999

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Lucien Nunes

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