Specification

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What is the Station Arrester?

The station arrester is a high-voltage electrical equipment used to safeguard electrical equipment in the substations against transient overvoltage such as that caused by lightning or switching. Their work principle is achieved through the protection of the voltage magnitude by ensuring that it is never beyond a given threshold that would harm transformers, circuit breakers, or any other aspect of the substation. The arrester normally comprises metal-oxide varistors (MOVs) that possess highly non-linear resistance values. When the voltage on the arrester looks higher than its rated protection level, the MOVs begin to conduct and then draw off the surge current and at the same time limit the voltage. Such timely action helps in eliminating the abnormal condition and prevents the system from any further disturbance. In this regard, it is extremely important to use such technology to preserve the reliability of the power systems and ensure that the safety of the circuits, especially at high voltage levels, can be maintained even in the presence of minor disturbances. They are designed to function irrespective of the environmental conditions and are usually deployed outdoors and are exposed to factors such as water from rain and snow, air airborne pollution among others.

How it works?

Station class arrester employed metal-oxide varistors (MOVs) for the safeguard of electrical equipment from high voltage transients. In normal conditions, the MOVs are in a high resistance state, and as a result, the arrester is inoffensive. During a surge, the MOVs’ impedance decreases and they can pass and dissipate the extra voltage to the ground with protection of voltage from rising to dangerous levels. After that, the MOVs are in a high resistance state while the arrester returns to its standby mode while providing sustained protection to the substation equipment.

Benefits

1. Equipment Protection:

Protects transformers and other substation equipment such as circuit breakers from dangerous overvoltage and thus increases the life of those equipment.

2. System Reliability:

Station class lightning arrester helps in not interrupting the power flow by effectively letting off the dangerous surge in a short span.

3. Cost-Effective:

Helps to protect substation equipment from destruction by voltage fluctuations and thus cuts down on expensive repair or replacement bills.

4. Durability:

They are developed for use in very adverse circumstances, to offer long-term solutions with little or no maintenance.

5. Fast Response:

Responds to overvoltage situations within microseconds making it possible to protect the device against transient spikes.

Application

1. Substations:

Shields transformers, switchgear, and other high voltage equipment in the substations against transient overvoltages.

2. Power Plants:

Prevents damage to electrical equipment used in generating stations thus enhancing their safety and reliability.

3. Industrial Facilities:

Found in applications where facilities have high voltage and hence need to protect the equipment used and to continue with their operations.

4. Transmission Lines:

Sited in some critical positions along the power transmission lines where they are likely to experience the impact from the lightning and switching on/off.

5. Renewable Energy Systems:

The station-class surge arrester is used in solar and wind farms to safeguard investors or any other vital equipment that allows voltage spikes due to lightning or grid interruption.

Certificate

Factory

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