Metal oxide arresters (MOA) are advanced overvoltage protection devices based on the nonlinear volt-ampere characteristics of zinc oxide varistor materials. It was developed in the 1970s and, with its superior performance, replaced the traditional silicon carbide arrester, becoming the dominant protection solution in modern power systems. MOA is designed to protect power equipment from damage caused by lightning strikes, switch operations and other transient overvoltages, ensuring the safe and reliable operation of the power grid and related equipment.
Product Parameter
|
Parameter |
parameter value |
|
Rated voltage of the system |
10KV |
|
DC Reference Voltage |
25KV |
|
Inrush Current |
42.5A |
|
Continuous Operating Voltage |
13.6KV |
|
Rated Voltage of Lightning Arrester |
17KV |
|
Square Wave Current Carrying Capacity |
150ms |
Product feature and application
One-piece molding, sealed without any gap. The raw materials are forged with strict quality control at every stage. They are made of silicone rubber through one-piece casting, effectively protecting the core from interference. They are resistant to pollution, moisture, leakage, and electrical corrosion, have good hydrophobicity and migration properties, and can operate safely in heavily polluted environments without maintenance
Good electrical conductivity:
The better A-class zinc oxide contacts and nonlinear volt-ampere characteristics have good electrical conductivity, which can effectively limit the damage of lightning overvoltage and operation overvoltage to electrical equipment
Strong impact resistance and shock absorption performance. They possess excellent brittleness resistance and creep resistance, are resistant to high and low temperatures, not easy to break, and have high bending and twisting strength
It can be used in various scenarios. It is applicable to railways, power stations, substations, communication industries, etc.
Production details
1.Lightning arrester model
| Lightning arrester model |
Rated voltage of the system(kV) |
rated voltage of arrester(kV r.m.s) |
continuous-running voltage(kV) |
Dc reference voltage(1mA)(kV) |
1/10μs Residual voltage under steep wave impulse current(kV) |
8/20μs Residual voltage under lightning impulse current(kV) |
30/60μs Residual voltage under operating impulse current(kV) |
2ms Square wave current-carrying capacity(2ms)(A) |
4/10μs High current impulse tolerance(kA) |
|
HY5WZ-5/13.5 |
3 |
5 |
4.0 |
7.5 |
15.5 |
13.5 |
11.5 |
150 |
65 |
|
HY5WZ-10/27 |
6 |
10 |
8.0 |
15.0 |
31.0 |
27 |
23.0 |
150 |
65 |
|
HY5WZ-17/45 |
10 |
17 |
13.6 |
24.0 |
51.5 |
45 |
38.3 |
150 |
65 |
|
HY5WZ-51/134 |
35 |
51 |
40.8 |
73.0 |
154 |
134 |
114 |
400 |
65 |
|
HY5WZ-54/134 |
35 |
54 |
43.2 |
77.0 |
154 |
134 |
114 |
400 |
100 |
Easy installation: The oxide metal lightning arrester adopts standardized interfaces, making the installation process simple and suitable for various substations and power equipment.
Maintenance free design: MOA does not contain gas and movable parts, and does not require regular maintenance during operation. Only regular inspections of the equipment's appearance and connection status are needed.
Long term stable operation: The product has undergone strict quality testing and has a service life of over 20 years. It can withstand a large amount of lightning strikes without performance degradation.
Production of Lightning arrester
FAQ
Q: What is the working principle of oxide metal lightning arrester?
A: MOA utilizes the nonlinear voltage current characteristics of metal oxide materials, which exhibit high impedance during normal operation. When overvoltage occurs, it quickly absorbs and guides energy to the ground, thereby protecting the power system from damage.
Q: How do I choose a suitable oxide metal lightning arrester?
A: When selecting MOA, the model should be matched based on the rated voltage, maximum impulse current, and discharge energy of the equipment. Simultaneously consider environmental conditions and installation requirements to ensure the selection of products that meet actual needs.
Q: Does MOA require regular maintenance?
A: Due to the lack of gas and movable parts in MOA, regular maintenance is not required under normal circumstances. Just need to regularly check whether its external structure is intact and ensure good grounding
Packing & Shipping
Hot Tags: valve-type lightning arrester, China valve-type lightning arrester manufacturers, suppliers, factory, electrical maintenance tools, Multi functional Cable Stripper, power detection and maintenance equipment, PV Panel Cleaning Tools, PV Panel Repair Tape, Transformer Insulating Oil