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IEC standard for low voltage surge arrester

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bolt

Chemical
Joined
Dec 30, 2002
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Which standard between IEC-99-4 and IEC 61643 should be applied for low voltage surge arrester installing at distribution transformer?
 
Hi Bolt,

Try IEC Std 664- Insulation co-ordination within low-voltage systems including clearances and creepage distance for equipment.
 
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