New phase control relays extended
Wieland Electric phase control relays have been extended by two new types of f lare – the Control P3-L and the Control P3-LTN.
They are designed for phase and voltage control imbalances. A phase imbalance is caused by unequal load distribution within the individual phases. In this case, part of the energy is converted into reactive power meaning the efficiency of a connected motor and the thermal load will increase until breakdown.
The f lare Control P3-L monitors phase failure, phase sequence and phase position in three-phase systems within a voltage range from 200 to 500V AC.
The f lare Control P3-LTN provides additional control functions such as the voltage balance control with both the response delay and the connected power voltage being adjustable.
These devices are equipped with a changeover and several diagnostic LEDs.