Single Plate Tap Changer

Product Detail

Single Plate Tap Changer
Purpose of a Tap Changer: A Load Tap Changer is a devise that is used to change the taps of a power transformer with the transformer energized and under load. A Load Tap Changer (when working correctly) allows the power output of the transformer to be changed with-out interruption. The purpose of the Load Tap Changer is to allow the voltage out-put to be regulated up or down without interruption to keep a set voltage available for distribution to customers. The tap or regulating windings of a load tap changing transformer are used to adjust the number of transformer turns usually in the secondary or low voltage windings. The regulating windings are divided in sections (taps) that can be added in series to the low voltage windings.

The DETC may be used to do the following: Adjust the transformer primary to match the transmission line voltage. Adjust the travel of the LTC (Load Tap Changer). Adjust the transformer turns to match the core flux density. Voltage change must be provided smoothly and efficiently without interruption to the secondary current flow. In other words, when changing tap positions, the LTC mechanism must MAKE-BEFOREBREAK to avoid opening the secondary circuit thus dropping voltage to your customers. A Resistance Load Tap Changer utilizes a resistor to limit the circulating current during a tap changer operation. These resistors are in the circuit for a very short time.

Model Explanation
 WDB ? - ?/?-???
    W:  off-circuit
    D :  single phase
    B :  plate type tap chager
    ?:  central point voltage regulation model
    ?:  rated current
    ?:  rated voltage
    ?:  number of tapping heads
    ?:  number of tapping position