Designed for Reliable Grid Performance
High-voltage shunt power capacitors are designed for 50 Hz and 60 Hz AC power systems and are widely used to improve power factor, stabilize grid voltage, reduce transmission losses, and enhance the overall efficiency of power generation and distribution systems. Engineered for reliable long-term operation, these capacitors support modern electrical infrastructure across utility, industrial, and energy applications.
Our high-voltage shunt capacitors are developed to deliver stable electrical performance under demanding operating conditions. With advanced dielectric technology, low loss characteristics, and strong overload capability, they help optimize network efficiency while supporting safe and dependable operation.
High-voltage shunt power capacitors are commonly used in
- Power transmission and distribution networks
- Utility substations
- Industrial power systems
- Renewable energy installations
- Reactive power compensation systems
Compliant with International Standards
Our capacitors are manufactured and tested in accordance with internationally recognized standards, ensuring high quality, safety, and operational reliability.
Key Standards and Specifications
- GB/T11024.1 – General requirements for shunt capacitors above 1 kV
- GB/T11024.2 – Endurance and aging testing
- GB/T11024.3 – Protection requirements for capacitor banks
- GB/T11024.4 – Internal fuse requirements
- DL/T840 – Specifications for high-voltage shunt capacitors in service
- GB/T311.2 – Insulation coordination principles and rules
- IEC 60871-1 – General requirements for AC shunt capacitors above 1000 V
- IEC 60871-2 – Endurance testing
- IEC 60871-3 – Protection of shunt capacitors and capacitor banks
- IEC 60871-4 – Internal fuse requirements
Advanced Electrical Performance
High Dielectric Strength
The dielectric system is designed to withstand demanding electrical stresses and can endure:
- AC power frequency test voltage up to 2.0 × rated voltage (UN) for 10 seconds
- DC test voltage up to 4.0 × rated voltage (UN) for 10 seconds
Accurate Capacitance Tolerance
The measured capacitance deviation remains within:
- -2% to +3% of the rated capacitance value
Ultra-Low Loss Characteristics
Low dielectric losses contribute to higher efficiency and reduced heat generation:
- Capacitors with internal fuses: tanδ ≤ 0.02%
- Capacitors without internal fuses: tanδ ≤ 0.015%
Built-In Safety and Protection
Integrated Discharge Resistors
Each capacitor is equipped with built-in discharge resistors that reduce the residual voltage from √2UN to:
- 75 V or below within 10 minutes
- In many cases below 50 V within 10 minutes
Strong Short-Circuit Discharge Capability
The capacitors are capable of withstanding:
- Five short-circuit discharges at 2.8UN within 10 minutes
Reliable Fuse Isolation
Internal fuse systems are engineered for dependable fault isolation and insulation performance, ensuring continued operational safety under abnormal conditions.
Excellent Partial Discharge Performance
The capacitors are designed to minimize partial discharge activity, improving insulation reliability and extending service life.
Inter-Electrode Partial Discharge
After testing at elevated voltage levels and prolonged operating conditions:
- No significant partial discharge occurs during operation at up to 1.6UN
- For extremely cold environments, the partial discharge quenching voltage remains above 1.2UN
Electrode-to-Shell Partial Discharge
The electrode-to-shell partial discharge quenching voltage is:
- Not less than 1.2Ulm (maximum operating line voltage)
High Overload Capability
Transient Overvoltage Resistance
The capacitor can withstand transient overvoltage peaks up to:
- 2√2UN for half a cycle
Continuous Overcurrent Capability
Designed for stable operation under elevated current conditions caused by voltage fluctuations and harmonic distortion:
- Continuous operating current up to 1.3IN
- Up to 1.43 times rated current for capacitors with maximum positive capacitance deviation
Engineered for Long-Term Reliability
Combining advanced materials, strict manufacturing processes, and comprehensive quality control, our high-voltage shunt power capacitors provide dependable performance, low maintenance requirements, and long operational life in critical power applications.