TRV Capacitors - AIS

Outdoor installation

In air-insulated switchgears (AIS), transient recovery voltage (TRV) capacitors are installed phase-to-ground. They decrease the oscillation frequency and the rate of rise of recovery voltage (RRRV) of TRV, which occurs during initiation or interruption of current flow. TRV capacitors are thus installed to increase breaking power of the circuit breaker.

TRV capacitors for AIS are available with a porcelain or a composite insulator. All standard porcelains are equipped with single or alternating long-short sheds and are in full compliance with IEC 60815. Maxwell standard fixing is independent of the flange diameter and ensures the interchangeability with old CONDIS® capacitors and the compatibility with the attachment of composite insulators. Other fixing methods are available on request.

The design of high-voltage TRV capacitors for AIS is usually customer-specific. Maxwell CONDOR technology offers a high flexibility and will therefore allow for a large customization to meet specific circuit breaker mechanical and electrical needs.

In a recent addition to the TRV capacitor product range, "arctic” capacitors have been designed for applications in the most severe environmental conditions, supporting extreme temperatures down to - 60 degrees Celsius.

Product Features
Synthetic oil-based capacitor technology
Capacitance 300pF and higher (e.g. 30nF 245kV)
Highest quality and reliability
Nominal voltage Un from 72.5kV to 550kV 50/60Hz
Insulator in porcelain or composite
Test voltage up to 810kV 50/60Hz
Maintenance free
Lightning impulse voltage up to 1300kV 1.2/50µs
Proven sealed construction
Switching impulse voltage up to 1000kV 250/2500µs
Corrosion resistance
Lightning impulse voltage chopped wave up to 2000kV 1.2/2µs
Vibrations and mechanical shocks up to 15g
Cantilever strength from 5kNm to 25kNm