Question

A transformer is rated for a 60 ampere secondary and has an impedance of 2%. What is the maximum current the secondary can deliver under a fault condition?

(a) 120 amperes
(b) 3600 amperes
(c) 3000 amperes
(d) 10000 amperes

Answer 1

The maximum current the secondary of the transformer can deliver under a fault condition is 3000 amperes.

Step-by-step explanation:

To determine the maximum current the secondary can deliver under a fault condition, we need to calculate the short-circuit current using the transformer's impedance.

Impedance is given by the ratio of voltage to current, so we can calculate the impedance as: 2% of the secondary voltage / rated secondary current.

Therefore, the maximum current the secondary can deliver under a fault condition is 3000 amperes.