Surge arrester for Capacitor
In modern electrical engineering, ensuring the stability and reliability of power systems is a critical priority. Among the key components that safeguard these systems, the surge arrester for capacitors plays a pivotal role. This protective device is specifically engineered to shield capacitors from transient overvoltages caused by lightning strikes, power system faults, or other electrical disturbances. By diverting excess voltage to the ground, capacitor surge arresters prevent damage to sensitive components, ensuring uninterrupted operation and longevity of the system.
Capacitor surge arresters operate by providing a low-impedance path to ground during transient overvoltage events. Their rapid response time is crucial, as it minimizes the duration and magnitude of voltage spikes that could otherwise degrade or destroy capacitors. Capacitors are integral to applications such as power factor correction, energy storage, and harmonic filtering, making their protection indispensable. The high energy absorption capability of these arresters ensures system stability even under severe surge conditions.
Key Benefits
Extended Equipment Lifespan: By mitigating overvoltage stress, surge arresters significantly reduce the risk of premature capacitor failure, thereby extending the operational life of electrical equipment.
Reduced Maintenance Costs: Preventing damage to capacitors lowers the frequency of replacements and downtime, resulting in cost savings for maintenance and repairs.
Enhanced System Reliability: Surge arresters contribute to the overall robustness of power systems, ensuring consistent performance and minimizing disruptions.
Improved Safety: These devices act as the first line of defense against catastrophic failures, protecting both personnel and equipment from hazards associated with power surges.
Technical Specifications
Surge arresters for capacitors are available in two primary types: gapless and series gap. Each type is designed to meet specific system requirements, as illustrated in the following tables:
technical parameters of capacitor type surge arrester：
| Surge arrester for Capacitor | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| System standard voltage | Arrester model | Rated voltage of arreste | Gapless surge arrester | Peak residual voltage (≯kV) | 2000μs Rectangular current impulse withstand | 4/10 High current impulse withstand (kA) |
|||
| Continuous operating voltage (kV) | DC 1mA Reference voltage (kV) | 0.75x DC 1mA Max leakage (μA) | 8/20 Lightning impulse current | 30/60 Operating impulse current | |||||
| 3 | (HY)YH5WR-3.8/13.5 | 3.8 | 2.0 | 7.2 | 50.0 | 13.5 | 10.5 | 400 | 65 |
| 3 | (HY)YH5WR-5/13.5 | 5.0 | 4.0 | 7.2 | 50.0 | 13.5 | 10.5 | 400 | 65 |
| 6 | (HY)YH5WR-7.6/27 | 7.6 | 4.0 | 14.4 | 50.0 | 27.0 | 21.0 | 400 | 65 |
| 6 | (HY)YH5WR-10/27 | 10.0 | 8.0 | 14.4 | 50.0 | 27.0 | 21.0 | 400 | 65 |
| 10 | (HY)YH5WR-12.7/46 | 12.7 | 6.6 | 24.0 | 50.0 | 46.0 | 35.0 | 400 | 65 |
| 10 | (HY)YH5WR-17/46 | 17.0 | 13.6 | 24.0 | 50.0 | 46.0 | 35.0 | 400 | 65 |
| 35 | (HY)YH5WR-42/134 | 42.0 | 23.4 | 73.0 | 50.0 | 134 | 105 | 400 | 65 |
| 35 | (HY)YH5WR-51/134 | 51.0 | 40.8 | 73.0 | 50.0 | 134 | 105 | 400 | 65 |
| System standard voltage | Arrester model | Rated voltage of arreste | Series gap surge arrester | Peak residual voltage (≯kV) | 2000μs Rectangular current impulse withstand | 4/10 High current impulse withstand (kA) |
|||
| Power frequency discharge voltage (kV) | 1.2/50 Impulse discharge voltage | Maximum conducting current (μA) | 8/20 Lightning impulse current | 30/60 Operating impulse current | |||||
| 3 | (HY)YH5CR-3.8/12 | 3.8 | 8.0 | 12.0 | 20.0 | 12.0 | 9.6 | 400 | 65 |
| 6 | (HY)YH5CR-7.6/24 | 7.6 | 16.0 | 24.0 | 20.0 | 24.0 | 19.5 | 400 | 65 |
| 10 | (HY)YH5CR-12.7/41 | 12.7 | 26.0 | 41.0 | 20.0 | 41.0 | 33.0 | 400 | 65 |
| 35 | (HY)YH5CR-42/124 | 42 | 80.0 | 124 | 20.0 | 124 | 100 | 400 | 65 |