These capacitors, installed in parallel with circuit breaker chambers, are essential for regulating voltage distribution and mitigating transient overvoltage during switchgear switching operations. With over 50 years of expertise in this field, our engineering team specialises in designing adapted solutions of grading capacitors for both Gas Insulated Switchgear (GIS) and Air Insulated Switchgear (AIS) applications. In DC applications, capacitors are combined with parallel resistors within the same housing to optimise electrical performance. See HVDC products for more details on DC applications.
Product features
Electrical specifications
Rated voltage of the circuit breaker, kV
up to 1100*
Rated voltage, kV
up to 380*
Rated capacitance, pF
from 150 to 2,500*
Frequency, Hz
50/60*/(DC)
Partial discharge, pC
less than 1.5*
Rated lightning impulse withstand voltage, kV
up to 2,200*
Rated switching impulse withstand voltage, kV
up to 1,800*
Short-duration power frequency
withstand voltage, kV
up to 1,100*
Mechanical specifications
Cantilever strength, kNm
up to 30*
Environmental
Temperature range, °C
-60 to +90*
Environment
air and gas*
Standard
IEC 62146-1* GBT 4787*
GB/T 4787.1-2021
*other values available upon request
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up to 800*Rated voltage, kV
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less than 5*Partial discharge, pC
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-60 to +90*Temperature range, °C
Some of the benefits we offer
Proudly Swiss Made, our capacitors are engineered for exceptional reliability and a long, maintenance-free lifetime. With more than 250,000 units delivered over the past 20 years, they reflect a proven track record of quality and trust. Their compact and efficient design ensures high transient performance, making them a powerful solution for demanding applications where space, durability, and responsiveness matter most.
