Zinc Oxide Arrester
Product Title
Product Details
Metal oxide arresters (zinc oxide arresters) produced and sold are currently the best type of overvoltage protection devices, widely used in power generation, transmission, transformation and distribution systems to protect the insulation of electrical equipment from overvoltage damage. Their core components adopt excellent "nonlinear volt-ampere" characteristics, greatly improving overvoltage current carrying capacity, thus bringing fundamental changes to arrester characteristics. Under normal operating voltage, the current through the arrester is only microampere level. When subjected to overvoltage, due to the nonlinearity of zinc oxide resistance, the current through the arrester instantly reaches thousands of amperes, and the arrester is in a conducting state, releasing overvoltage energy, thereby effectively limiting overvoltage damage to transmission and transformation equipment. For insulation weak points such as motor windings, HY2.5WD-8/18.6kV motor zinc oxide arrester can provide precise overvoltage limitation, extending equipment service life.
Organic housing metal oxide arresters are a scientific research achievement combining organic insulation materials with traditional porcelain housing metal oxide arrester technology advantages. They not only have the advantages of porcelain housing metal oxide arresters, but also have good electrical insulation performance, high dielectric strength, anti-tracking, anti-corrosion, heat resistance, cold resistance, aging resistance, explosion-proof, hydrophobicity, and good sealing performance. Therefore, HY2.5WD-8/18.6kV composite housing motor zinc oxide arrester is particularly suitable for motor circuit applications with complex environmental conditions and high insulation protection requirements.
HY2.5WD-6kV zinc oxide arrester is suitable for AC 220kV and below power generation, transmission, transformation and distribution systems, used to limit the amplitude of lightning and system internal operating overvoltages to specified levels, and is the basic equipment for system insulation coordination. At the same time, this product cannot be used to limit resonance overvoltage; system resonance suppression requires other methods. For 6kV motor circuits, selecting HY2.5WD-8/18.6kV motor zinc oxide arrester can effectively limit switching overvoltages and lightning overvoltages, protecting motor insulation coordination.
This product model is compiled according to JB/T8459-1996 "Arrester Product Model Designation Method". Gapless products comply with GB11032-2000 "AC Gapless Metal Oxide Arresters"; gapped products comply with JB/T9672-2005 "Metal Oxide Arresters with Series Gaps". Important parameters and configuration methods not clearly defined in the above standards shall be modified and implemented according to DL/T620-1997 "Overvoltage Protection and Insulation Coordination of AC Electrical Installations".
| Arrester Model | System Rated Voltage kV | Arrester Rated Voltage kV | Continuous Operating Voltage kV | DC 1mA Voltage kV | Lightning Impulse Residual Voltage kV | Switching Impulse Residual Voltage kV | Square Wave Current Capacity A | High Current Impulse Withstand kA | 0.75U1mA Leakage Current μA | Material | Application |
|---|---|---|---|---|---|---|---|---|---|---|---|
| HY2.5WD-7.6/18.7 | 6.3 | 7.6 | 4.0 | 11.2 | 18.7 | 15.0 | 200 | 65 | 50 | Composite Housing | Motor Type |
| HY2.5WD-8/18.7 | 6.3 | 8 | 6.3 | 11.2 | 18.7 | 15.0 | 200 | 65 | 50 | Composite Housing | Motor Type |
| HY2.5CD-7.6/17 | 6.3 | 7.6 | - | - | 17.0 | 13.8 | 200 | 65 | - | Composite Housing | Motor Type |
HY2.5WD-8/18.6kV_Motor Zinc Oxide Arrester_Motor Protection
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