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Example:
1000VA transfomer.
Primary voltage: 400V
Secondary voltage: 110V (one leg earthed)
Now maybe I'm taking this too simply but:
ideally max. current on primary side:
1000VA/400V = 2.5A
So a 6 Amp fuse is more than enough from an overload point of view?
But the 6 amp fuse blows due to inrush current...
A 10 amp fuse blows due to inrush current...
A 16 amp (or was it a 20 amp cant remember?)was OK.
How does a 16 amp fuse protect transformer from overload at 400V, yet inrush current prevents anything smaller?
1000VA transfomer.
Primary voltage: 400V
Secondary voltage: 110V (one leg earthed)
Now maybe I'm taking this too simply but:
ideally max. current on primary side:
1000VA/400V = 2.5A
So a 6 Amp fuse is more than enough from an overload point of view?
But the 6 amp fuse blows due to inrush current...
A 10 amp fuse blows due to inrush current...
A 16 amp (or was it a 20 amp cant remember?)was OK.
How does a 16 amp fuse protect transformer from overload at 400V, yet inrush current prevents anything smaller?