Metal Oxide Varistor Surge Arrester -BT 4L PBM120 385V 3P
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Type
BT 4L PBM120 385V 3P
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Art.-No.
840002
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Features
1. Surge arresters for class I three-phase TN-C system.
2. Max. Discharge current up to 120kA 8/20us.
3. Built-in circuit breaker, prewired with SPD, easy for installation.
4. Can inspect the SPD operation window, suitable for indoor application.
5. Green indicates normal and red light indicates fault for operation.
6. Impulse counter function, recording the lightning events.
7. External wiring terminal, easy for connection.
8. Mode of protection: L-PEN.
Metal Oxide Varistor Surge Arrester is designed to control transient overvoltage within electrical systems using nonlinear resistance characteristics. When abnormal voltage occurs, the varistor rapidly changes impedance to divert surge energy away from protected circuits. The device remains passive during normal voltage conditions and activates only when preset thresholds are exceeded. It is suitable for installation at power distribution points, equipment inputs, and control panels. By limiting surge amplitude, it helps reduce electrical stress on components and supports safer operating conditions across power networks and connected electrical equipment.
Features
1. Nonlinear Voltage Response: Changes resistance rapidly when voltage exceeds defined limits.2. Fast Overvoltage Clamping: Restricts surge amplitude during transient voltage events.
3. Passive Standby Operation: Remains inactive under normal electrical conditions.
4. Compact Component Structure: Allows installation in panels and equipment enclosures.
5. Repeated Surge Handling: Supports multiple transient events within rated capacity.
6. Broad Circuit Compatibility: Suitable for AC and DC electrical applications.
Advantages
1. Component Stress Reduction: Lowers voltage impact on sensitive electrical parts.2. Circuit Protection Support: Helps reduce surge-related damage within power lines.
3. Source-Level Overvoltage Control: Manages abnormal voltage near entry or interface points.
4. Stable Electrical Operation: Supports consistent voltage conditions during disturbances.
5. Long-Term Use Capability: Suitable for repeated exposure in power systems.
6. Simple Integration: Fits into existing electrical layouts without structural change.
Applications
1. Power Distribution Panels: Surge control for incoming and outgoing circuits.2. Electrical Equipment Inputs: Protects devices connected to external power sources.
3. Control and Automation Systems: Applied in control cabinets and signal circuits.
4. Industrial Power Networks: Suitable for equipment exposed to switching surge.
5. Communication Power Lines: Supports protection of signal and power interfaces.
6. Electrical System Upgrades: Adds overvoltage control during system expansion projects.
Technical Data
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