ABB MWD-14 Surge arrester MWD series oxide arrester in stock

Here is the introduction to the ABB MWD-14 surge arrester in the MWD series:

General Information

The ABB MWD-14 is a silicone-housed surge arrester of IEC class station low (SL) for AC systems. It is designed for indoor use only and is suitable for systems with voltages up to 52 kV.

Construction and Design

It is a shedless surge arrester that uses metal-oxide (MO) resistors without spark gaps. These resistors are directly molded in a grey-colored silicone housing. This design offers excellent protection against overvoltages while ensuring reliable performance and a long service life.

Electrical Specifications

Rated Voltage: The rated voltage of the MWD-14 is 17.5 kV. This indicates the voltage level at which the surge arrester is designed to operate effectively and provide proper protection.

Discharge Current Capacity: It has the ability to handle high - magnitude discharge currents. It can withstand and safely dissipate the energy associated with surges caused by atmospheric discharges and switching conditions, protecting the connected electrical equipment.

Voltage - Current Characteristics: The metal - oxide resistors in the MWD - 14 exhibit non - linear voltage - current characteristics. Under normal operating voltages, the arrester has a high resistance, allowing only a negligible amount of current to flow. However, when an overvoltage occurs, the resistance decreases rapidly, enabling the arrester to conduct a large current and limit the voltage across the protected equipment to a safe level.