Electric power changeover device

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  #1  
Old 10-20-14, 12:49 AM
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Electric power changeover device

Hi
i have an automatic power changeover
work by a relay printed on circuit board
as i photo below


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with max 30 ampere

voltage 220 volt
frequency 50 Hz

the device get hot
but works perfectly
is that normal or not
P.S
i checked the drawn current by a clamp meter
it was 10 ampere
 
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  #2  
Old 10-20-14, 07:54 AM
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Without having any information on that device it would be best to contact the manufacturer to see if it should be running hot.
 
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Old 10-21-14, 08:09 AM
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i asked some electricians here
about the high temperature of the device
they assumed its normal
because the device is contain a relay which get hotter when current pass through it\
is that correct
 
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Old 10-21-14, 08:14 AM
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Yes...a relay on a printed circuit board will get warmer as more current is drawn thru it.
 
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Old 10-21-14, 08:30 AM
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ok
as i said the drawn current was 10 ampere
while the max operateed current is 30 ampere
so the relay wasn't at max load
so in this case is the warming is normal
 
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Old 10-22-14, 01:10 AM
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I can't help you much more. I am not familiar with your transfer device.
 
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Old 12-20-14, 11:20 PM
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hi
sorry for late post
i opened the electric device so u can check its components

 
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Old 12-21-14, 02:04 AM
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Looks like a pretty lightweight device for switching 30A. The wiring may run slightly warm and the relays may also.
 
  #9  
Old 12-23-14, 11:56 PM
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ok
then th relay warming is normal ??
 
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