The Full Form of AT&C is Aggregate Transmission and Commercial.
The aggregate technical and commercial loss is calculated using the following formula:
% AT&C Losses = {1- (Billing Efficiency x Collection Efficiency)} x 100
The Technical loss = Loss found from load flow in electrical lines + Transformation loss in transformers
Commercial loss = Total loss – Technical loss where total loss=Input Energy x AT&C loss
AT&C
means
Aggregate Transmission and Commercial
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