Bushing Coupling Units
The bushing coupling units are for permanent installation on power transformers. Together with a matching bushing adapter they serve to make different signals available for measurement and monitoring. The bandwidth of the partial discharge signals extends to 20 MHz. The voltage signal of the built-in capacitive divider serves to synchronize the partial discharge acquisition and to measure the voltage. However, the excellent bandwidth of the voltage signal allows also transfer impedance measurements and tan delta (power factor) measurements.
The bushing coupling unit comes in a IP65 protected enclosure with a PTFE insulated input cable. Thus, it is suitable for indoor and outdoor use. The voltage range and bushing capacitances (C1 and C2) have to be specified on order.
Bushing Adapters
Due to the many different versions of transformer bushings and, hence, bushing test tabs, individual adaptation and flexible installation of bushing accessories are required for testing. Power Diagnostix offers various bushing adapters fitting to many different models of bushing test tabs.
Other adapter models are available on request and will be custom made.
