Capacitor Products, such as Coupling Capacitors, Transient Recovery Voltage Capacitors or Grading Capacitors are used within HV networks for various purposes. Examples are: coupling high frequency carrier signals to the power line as well as (in combination with CB) reducing transient overvoltages, ensuring uniform voltage distribution or increasing the switching capacity of a breaker.
800
AC and CD up to kV
operation voltage
Trench capacitors improve other HV products’ performance and detection of faults in the grid.
Grading Capacitors
Grading Capacitors are used in combination with High Voltage Circuit Breakers with different purposes.
- Multibreak Circuit Breakers:
- Grading Capacitors ensure uniform voltage distribution across all contacts points during normal and switching system operation
- Single break Circuit Breakers:
- Grading Capacitors can be used to increase the switching capacity of the breaker
- 90 up to 300 kV
- Sealed construction, maintenance free
- All external metallic components made by aluminum or inox steel
- High customization range to match CB mechanical and electrical parameters
- High mechanical resistance to shock and vibration due CB‘s switching operation
- Available in compliance with all international standards
GC’s – DT and GIS Circuit Breakers
(indoor installation inside SF6 CB’s gas enclosure)
- Synthetic liquid or SF6 + paper and/or polypropylene insulation
- Fiberglass tube insulator
GC’s – AIS Circuit Breakers
(outdoor installation)
- Synthetic liquid + paper and/or polypropylene insulation
- Porcelain or composite insulator
AC Capacitors
TRV Capacitors
- Used in combination with Circuit Breakers (CB) to reduce the transient overvoltage that can happen during switching operations > Transient Recovery Voltage (TRV) Capacitor
- High customization range to match CB mechanical and electrical parameters
- High mechanical resistance to shock and vibration due to CB‘s switching operation
Trench capacitors are the best solution for utilties and OEM which are looking to empower the grid and improve their own product capabilities and performances.
Coupling Capacitors (CC)
- Suitable for Line Traps installation on the top of CCs
- Coupling and de-coupling of HF-signals to the power line
- Connecting of line fault locators
- Available from 24 kV up to 800 kV
- High capacitance values
- Low inductance design
- Oil insulation
- Composite or Porcelain insulator
- Available in compliance with all world international standards
- High mechanical resistance to Static force:
- due to Line Trap application on the top
- dynamic: due to short circuit current on HV network
DC Capacitors
Utilized in HVDC applications in conjunction with thyristor valves and can be used for Transient Recovery Voltage (TRV) control in substations and/or additionally for PLC communication, harmonics filtering, fault detection.
- Available from 10 kV up to 800 kV
- Serial resistance
- Sufficient grading current
- High seismic withstand design
- Oil insulation
- Composite insulator
- Reducing/filtering transient overvoltage & harmonics
- Coupling and de-coupling of HF-signals
- Built-in parallel grading resistor to guarantee an even voltage distribution
- Connecting of line fault locator
- Available in compliance with all international standards