Why is voltage balance important in electrical phase converters?
When the voltages between the three phases are not equal, the current increases dramatically in the motor windings, creating heat. If allowed to continue, this heat will damage the motor. It is possible, to a limited extent, to operate a motor when the voltage between the phases is not balanced. To do this, the load must be reduced. As a rule of thumb, if the voltage is out of balance by just 5%, the motor must be derated to 75% of its rated capacity. Contrary to digital ones, rotary and static converters are commonly 25-30% out of balance!
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- Why is voltage balance important in electrical phase converters?
