During operation, vacuum circuit breakers may encounter various faults, and timely and effective troubleshooting is crucial.First, abnormal noises or vibrations are common issues — the internal components should be checked for looseness or wear.Second, if the vacuum circuit breaker fails to operate...

Guide rail oil leakage is one of the most common faults and requires a comprehensive approach for effective resolution.First, identify the source of the leakage—common causes include damaged seals or loose connections. In such cases, replace the sealing ring or reinforce the connection area.Second,...

An electric controller is a key component used to control and regulate electrical equipment. Its primary function is to control the flow of electric current by receiving command signals, thereby enabling automatic operation of the equipment. The internal structure of an electric controller typically...

A vacuum circuit breaker (VCB) is a type of switchgear used in power systems to open or close electrical circuits. Its most notable feature is the use of vacuum as the insulating and arc-quenching medium, enabling highly efficient insulation and arc extinction.During operation, the vacuum circuit br...

Switchgear is an indispensable component of power systems, primarily used to control, protect, and isolate electrical equipment. Its functions range from enabling the connection and disconnection of electrical currents to ensuring equipment protection during faults and preventing the escalation of a...

During operation, high-voltage equipment may experience mechanical jamming faults, typically caused by internal wear, insufficient lubrication, or the intrusion of foreign objects. When such jamming is detected, the equipment should first be shut down for inspection, and the affected components shou...

The basic working principle of an earthing switch is to safely connect or disconnect electrical equipment from the ground by controlling the grounding point within the circuit. Its structure typically consists of contacts, a driving mechanism, and an energy storage device.During operation, the energ...

Vacuum circuit breakers are widely used in power systems due to their excellent insulation performance and safety features. First, the vacuum environment effectively prevents the formation of electric arcs, thereby reducing the risks of electric shock and equipment damage. In addition, vacuum circui...

The grounding switch is an indispensable component in power systems, primarily designed to ensure equipment safety and system stability. By grounding the equipment, the grounding switch effectively prevents overvoltage and leakage currents from damaging electrical devices. In the event of a fault, t...

In power systems, switchgear primarily includes circuit breakers, disconnect switches, earthing switches, and load switches. These devices play a critical role in the operation and safety of the electrical network.Circuit breakers can quickly interrupt the circuit in the event of a fault, protecting...

Faults in the secondary circuit of a current transformer (CT) are often manifested as abnormal current or voltage signals, which can affect the normal operation of the system. First, check the cables, connectors, and insulation conditions of the secondary circuit to determine whether there is any ph...

Energy storage failure in earthing switches usually arises from several factors.First, mechanical faults are a major cause—particularly the wear or aging of springs, which can reduce the effectiveness of the energy storage mechanism. Additionally, electrical issues such as unstable voltage or poor c...

Condensation often occurs inside switchgear due to temperature fluctuations. This phenomenon becomes more noticeable when the temperature drops sharply or in environments with high humidity. When condensation accumulates inside the switchgear, it can cause a decline in the performance of insulation...

The safe operation of high-voltage electrical equipment depends on several fundamental requirements.First, the equipment must have excellent insulation performance to prevent leakage currents and short-circuit accidents. Second, regular maintenance and inspection are essential to ensure proper opera...

Abnormal temperature rise is a critical factor affecting the performance and safety of vacuum circuit breakers (VCBs).First, overloading is one of the main causes of increased temperature. When the load exceeds the design capacity, the current generates additional heat. Additionally, poor internal c...

The overheating of switchgear contacts is typically caused by several factors.First, poor contact connections can generate excessive heat when current passes through. For example, loose bolts or contaminated contact surfaces can increase contact resistance, leading to overheating of the contacts.Sec...

In power systems, when a vacuum circuit breaker (VCB) operates under high-voltage conditions, its insulation performance and switching capability are significantly affected. High voltage intensifies the electric field strength, increasing the risk of insulation breakdown, which may lead to equipment...

Eberry Electric Co., Ltd. warmly invites you to visit our booth at the 25th Iran International Electricity Exhibition (IEE 2025) in Tehran. We will showcase our latest switchgear and high-voltage solutions designed for reliability and field-proven performance.Date: 11–14 November 2025Venue: Tehran I...