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Power transformer loading

Former Community Member
Former Community Member

Greetings.



 



I have often come across the notion that newly commissioned power transformers and transformers that have been out of service due to a fault or outage should be kept on no-load for some hours before loading.



 



I like to know the reason for this.



 



Thanks.


Parents
  • Former Community Member
    0 Former Community Member
    Hi DJ,

    I can think of two good reasons:-

    1. If it does self-destruct it will not do any more damage - use a suitable mcb and rcd and set up well away from flammables.

    2. With no load it will run reasonably hot (max flux in the core) - a good stress test and it will dry out.

    Chris
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  • Former Community Member
    0 Former Community Member
    Hi DJ,

    I can think of two good reasons:-

    1. If it does self-destruct it will not do any more damage - use a suitable mcb and rcd and set up well away from flammables.

    2. With no load it will run reasonably hot (max flux in the core) - a good stress test and it will dry out.

    Chris
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