PowerHV products

PowerHV offers the high-precision measuring bridge and standard capacitor for the C & tan delta measuring. The QS87 is a high precision bridge particularly for use in laboratory. It mainly takes advantage of current comparison, which makes it extraordinary precise and reliable in measurement and distinguishes the bridge from Schering bridge and high voltage dielectric loss tester. The use of computer-aided data processing unit makes the measurement more intuitive and convenient. Using in conjunction with high voltage standard capacitors, the bridge is functioned to measure under high voltage capacitance and tgδ of high voltage products such power cables, bushings, power capacitors, reactors and transformers. It can also test dielectric constant and tgδ of solid/liquid insulating materials, or ratio error and phase error of power/instrument transformers.

High-voltage dividers are used to measure voltages and decouple partial discharges in high-voltage test systems. Depending on the specific type, they are used to measure alternating voltage (AC), direct voltage (DC), lightning impulse voltage (LI), and switching impulse voltage (SI) systems. High-voltage dividers by PowerHV comply with the relevant IEC standards 60060, 61083, and 60052. The systems are available for both indoor and outdoor use.

The impulse current shunts are designed for impulse current measurements on low inductive test objects. They are primarily used for impulse current measurements on power transformers (IEC 60076-3). Yet they can also be used for impulse current measurements with wave shapes 4/10 µs, 1/20 µs, and 30/80 µs on metal-oxide surge arresters according to IEC 62475. They are available with a rated resistance ranging from 0.1 ohms to 10 ohms and a rated current ranging from 100,000 A to 50 A.