ABB MWD-12 Surge arrester MWD series oxide arrester in stock

Here is the product introduction of the ABB MWD-12 surge arrester:

General Description

The ABB MWD-12 is a silicone-rubber-insulated, gapless metal - oxide surge arrester in the MWD series. It is designed for indoor use in AC power systems to protect electrical equipment from over - voltage surges.

Technical Characteristics

• Rated Voltage: Usually 17.5 kV, suitable for AC systems with a nominal voltage of around 15 kV.

• Continuous Operating Voltage: It can continuously operate at 13.8 kV, ensuring stable performance during normal operation.

• Nominal Discharge Current: The nominal discharge current is 10 kA, which allows it to effectively handle large - amplitude over - voltage surges caused by lightning or switching operations.

• Residual Voltage: When discharging, it can limit the residual voltage to a relatively low level to protect the connected electrical equipment. For example, the residual voltage at 8/20 μs wave shape may be around 40 kV.

• Excellent Non - linear Characteristics: Using metal - oxide (MO) resistors as the core component, it shows excellent non - linear volt - ampere characteristics. Under normal voltage, the resistance is very high, and the leakage current is only in the micro - ampere range. When an over - voltage occurs, the resistance decreases rapidly, allowing a large current to pass through and discharge the over - voltage energy.

Environmental Adaptability

• Temperature Range: It can operate normally in the ambient temperature range from - 60℃ to + 40℃, adapting to various harsh natural environments.

• Other Environmental Factors: It has good resistance to humidity, pollution, and mechanical vibrations, ensuring reliable operation in different field conditions.