Surge diverters effectively protect against voltage surges resulting from the operation of medium and high voltage power distribution switchgear. Unlike lightning strikes, which are high-energy events, these transient surges typically arise from operational anomalies or rapid changes within the electrical system.
Applications
The range of surge diverters suits applications with infrequent switching but high stored energy levels. VSDs work well to protect transformers, generators, and motors, particularly those vulnerable during stalled or accelerating conditions. They are also ideal for devices or loads with low or unknown impulse voltage withstand levels.Maintenance
Replace surge diverters when changing the main operational components of the switchgear, or if severe abnormal switching conditions or switchgear failures occur. Disconnect these voltage-limiting devices from the system before applying any insulation proof testing voltage, or else you risk damaging the diverters.• Suitable for use in medium voltage systems with working voltages from 3.3 kV to 11 kV rms
• Provides maximum protection at high fault levels due to switching surges
• Protects all types of MV transformers, generators, and motors
Key Functions
Voltage Clamping
Surge diverters are designed to clamp the voltage to a safe level, ensuring transient surges do not exceed the maximum voltage rating of the equipment. This prevents damage to insulators, conductors, and other critical components of the power line.Diverging of Current
During surges, the diverter directs the extra current away from sensitive devices and into a grounding system. This process avoids negative effects on electrical infrastructure and maintains operational continuity.Improved Reliability
By reducing the impact of transient surges on a power transmission network, surge diverters enhance overall reliability. They also help minimize unscheduled outages and extend the lifespan of crucial equipment.Types of Surge Diverters
High voltage applications use various types of surge diverters, each designed for specific operating conditions:Metal-Oxide Varistors (MOVs)
MOVs are popular for their ability to handle high energy surges and robust performance across different voltage levels.Silicon Carbide (SiC) Arresters
SiC arresters offer high voltage tolerance and durability. They exhibit excellent characteristics, especially in severe environments.Gapped Arresters
Gapped arresters use a gap to break down and divert surge current, typically employed for high voltage and high-energy applications.Requirements
Proper installation ensures optimal performance of surge diverters. Typically, install these devices at key transmission line points, such as substations and critical junctions. Regular maintenance checks are crucial to keep the devices in good working condition and ensure they respond effectively during surge events.Surge arresters are indispensable for high-voltage power transmission, protecting the grid from temporary surges. They clamp voltage, divert current, and enhance system reliability. Their role in maintaining grid stability is crucial and their development and expansion are highly valuable.
We design and manufacture high-quality switchboards. Contact us today to discuss your requirements and get started!