saturation level. If the core flux should exceed the saturation level, the flux patterns in the core
and the surrounding structure would change, and significant flux levels may be reached in the
transformer tank and other structural members. As these are not laminated, very high eddy currents
are likely to result, producing severe damage to the transformer. It is therefore desirable to provide
a protection package which will respond to the flux level in the transformer. As the flux is proportional
to the voltage, and inversely proportional to the operating frequency, the significant relaying
quantity is the ratio of the per unit voltage to the per unit frequency. This is known as volts/hertz
protection.