ABB MWD-11 Surge arrester MWD series oxide arrester in stock

Here is the product introduction of the ABB MWD-11 surge arrester:

General Description

The ABB MWD-11 is a member of the MWD series of surge arresters. It is a silicone - rubber - insulated, gapless metal - oxide surge arrester, designed for indoor use in AC power systems to protect electrical equipment from over - voltage surges.

Technical Characteristics

Rated Voltage: The rated voltage is 13.7 kV, suitable for AC systems with a nominal voltage of around 10 kV.

Continuous Operating Voltage: It can continuously operate at a voltage of up to 11 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 31 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.