
GA - LTC VAC 15.0kV, 875 Amperes
- A step-voltage regulator is a tapped autotransformer. In a voltage regulator, the equivalent of the high-voltage winding in a two-winding transformer would be referred to as the shunt winding, the low-voltage winding would be referred to as the series winding, the series winding is connected to the shunt winding in order to boost or buck the applied or primary voltage approximately 10%.
- The polarity of its connection to the shunt winding is accomplished by the use of a reversing switch on the on-load tap changer. Eight approximately 1¼% taps are added to the series winding to provide small voltage-adjustment increments.
- To go even further to provide fine voltage adjustment, such as 16 approximate 5/8% tap steps, a center-tapped bridging reactor used in conjunction with two movable contacts on the on-load tap changer, there are 33 position that include neutral, 16 lower position 1L,2L….16L and 16 Raise position 1R,2R…..16R
- It is common practice to have the tap changer located in the same compartment as the core and coil.
- The process of moving from one voltage- regulator tap to the adjacent voltage-regulator tap consists of closing the circuit at one tap before opening the circuit at the other tap. The movable tap changer contacts move through stationary taps alternating in eight bridging and eight nonbridging positions.
- The geared motor operates the Geneva through the spring drive. Every tap drive by 20° angle.
- Two micro switches provided; one is for indicate neutral position another one is for no of operations.
- The tap position indicator connected through the flexible shaft or Magnetic drive shaft.