ABB MWD-03 Surge arrester MWD series oxide arrester in stock

The ABB MWD-03 is a silicone-rubber-insulated, gapless metal-oxide surge arrester, designed to protect electrical equipment in AC power systems from over-voltage surges.

Here is a detailed product introduction:

Technical Characteristics

• Rated Voltage: 3 kV, suitable for AC systems with a nominal voltage of 2.4 kV.

• Continuous Operating Voltage: It can continuously operate at a voltage of up to 2.4 kV, ensuring stable performance during normal operation.

• Nominal Discharge Current: The nominal discharge current is 10 kA, enabling 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 10 kV.

• Excellent Non-linear Characteristics: Utilizing metal-oxide (MO) resistors as the core component, it exhibits 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.