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ABB ST701A HITR402804R0001 Factory Sealed Box
This type of discrimination is based on the observation that the closer the fault
comes to the network’s feeder, the greater the short-circuit current will be. We
can therefore pinpoint the zone where the fault has occurred simply by calibrating
the instantaneous protection of the device upstream to a limit value higher than
the fault current which causes the tripping of the device downstream.
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