Table 450.3(A)about Max. rating or setting of overcurrent protection for transformer. Why is the primary protection over 600 volts of transformer with more than 6% impedance has a maximum setting up to 600% for circuit breaker? When we try to coordinate this max. setting with the allowable transformer through fault current duration for liquid immersed transformer based on ANSI/IEEE Std C57.109-1993, there is possibility that it will not be properly coordinated. Can anybody enlighten me about this matter?
Table 450.3 (A)X'former Overcurrent Protection
- Thread starter Gem Tan
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