| Brand | Switchgear parts |
| Model NO. | Zinc-Oxide Surge Arrester |
| Discharge current | 10kA |
| Series | YH5W YH10W |
The metal zinc oxide trap is a high-tech product from the 1990s internationally. It uses zinc oxide resistors with excellent nonlinear volt ampere characteristics, which greatly improves the protection characteristics of lightning arresters under steep slopes, lightning waves, and operating waves compared to traditional silicon carbide lightning arresters. Especially zinc oxide resistors have good steep slope response characteristics, no delay in steep slope voltage, low residual voltage during operation, and no discharge dispersion. Thus, it overcomes the inherent disadvantages of high slope discharge voltage caused by steep slope discharge delay and high operation wave discharge voltage due to large dispersion of operation wave discharge in silicon carbide lightning arresters, greatly improving the protection margin under steep slopes and operation waves. Moreover, in terms of insulation coordination, it can achieve similar protection margins for steep slopes, lightning waves, and operation waves, providing optimal protection for power equipment and improving the reliability of protection. Zinc oxide lightning arrester has the ability to absorb lightning overvoltage, operational overvoltage, and power frequency transient overvoltage simultaneously. The composite jacket metal zinc oxide lightning arrester is a high-tech product from the 1990s internationally. It is molded with integral silicone rubber, which has good sealing performance and excellent explosion-proof performance. Pollution is free from cleaning, and can reduce the occurrence of wet flashes in foggy days. It is resistant to electrical corrosion and aging, small in size and light in weight, and collision resistant, which is convenient for installation and maintenance. It is an upgraded product of porcelain bushing lightning arrester.
-
Connector with surge arrester
-
DNF1-2-3P series in line fuse holders NH2 Fuse link
-
DNF1-3 Series single fuse holder NH3 Fuse link
-
DNF1-3-3P Series atc fuse holder NH3 Fuse link
-
DNF1-2 series fuse holder automotive NH2 Fuse link
-
DNF1-1 series fuse holder inline NH1 Fuse link
-
DNF1-00 series inline fuse holders NH00 Fuse link
-
Why Regular Transformer Maintenance Matters: 5 Serious Consequences of Neglecting ItI. Allowable TemperatureWhen a transformer is in operation, its windings and iron core generate copper loss and iron loss. These losses are converted into heat energy, causing the temperature of the transformer's iron core and windings to rise. If the temperature exceeds the allowable value for a long time, the insulation will gradually lose its mechanical elasticity and age.The temperature of each part of the transformer during operation is different: the winding temperature is the highest, folRockwell09/12/2025 -
How to Implement Condition-Based Maintenance for Power Transformers? A Complete 4-Step Process Analysis1. Definition of Condition-Based MaintenanceCondition-based maintenance refers to a maintenance method where decisions on whether and how to perform maintenance are determined based on the real-time operating status and health condition of equipment. It has no fixed maintenance methods or schedules. The prerequisite for condition-based maintenance is the establishment of equipment parameters and the comprehensive analysis of various operational information of the equipment, so as to make reasonaNoah09/12/2025 -
Can't choose a dry-type transformer? Get expert advice – free.Traction Rectifier TransformersRated capacity: 800 to 4400 kVA; Voltage class: 10 kV and 35 kV; Rectifier pulse number: 12-pulse and 24-pulse. Compared with 12-pulse rectifier circuits, 24-pulse rectifier circuits can reduce the harmonic pollution of the power grid by 50%, and no filtering equipment is needed at this location. It is suitable for power supply systems of urban subways and rail transit.Excitation Rectifier TransformersRated capacity: 315 to 3000 × 3 kVA; Voltage class: 10 kV, 13.8Vziman09/12/2025 -
SG10 Series Transformer Overload Protection Solution | Prevent Overheating and Damage, View NowOperating Conditions in National Standard GB 6450-1986Ambient temperature: Maximum ambient temperature: +40°C Daily average maximum temperature: +30°C Annual average maximum temperature: +20°C Minimum temperature: -30°C (outdoor); -5°C (indoor) Horizontal axis: Product load; Vertical axis: Average coil temperature rise in Kelvin (note: not in Celsius).For Class H insulation products, the long-term temperature resistance of insulation materials is stipulated by the state as 180°C. However, the inRockwell09/12/2025 -
High harmonics? Your transformer may be overheating and aging fast.This report is based on the analysis of one-day power quality monitoring data of your company's distribution system. The data shows that there is significant three-phase current harmonic distortion in the system (with a high total harmonic distortion of current, THDi). In accordance with international standards (IEC/IEEE), harmonic currents at this level have posed substantial risks to the safe, reliable, and economical operation of the power supply transformer, mainly manifested in additional hLeon09/12/2025 -
Ultimate Guide to AC Contactor Abnormal Noise: From Electromagnetic Noise to Mechanical Vibration, Accurate Diagnosis and HandlingIn electrical control systems, AC contactors are among the commonly used electrical components, and they are also a common source of various electrical faults. After long-term use—especially in harsh environments with high levels of dust—AC contactors may sometimes emit squeaking or rattling noises after being pulled in and held. The causes of this phenomenon are analyzed as follows.Squeaking Noise After Pull-In and HoldingA fully functional AC contactor makes no noise when energized and pulledFelix Spark09/11/2025
