The 2V200 is specifically designed for operation with the RMS type 2V164 Voltage Regulating Relay (VRR) & application on power transformers fitted with on load tap changers. The 2V200 provides a noise immune interface between the tap changer & a remote tap position indicator (TPI), display.
The 2V200 is designed to interface with tap changers using either binary / BCD coded signals or a traditional voltage divider circuit. The 2V200 generates a 50V DC output to connect to the auxiliary contacts on the tap changer. These contacts are often prone to high resistance & voltages lower than 50V may prove unreliable due to low whetting currents. The 2V200 converts the tap changer auxiliary contact inputs to a low frequency signal proportional to the tap position.
The 2V164 VRR converts this frequency to a voltage signal through an optically isolated input which is then feed into an A-D converter. The tap position is displayed on the front panel of the 2V164 based on the pre-programmed maximum tap position.