Manual for VD4

Manual for VD4

Brand: ABB

Category: Other

Document Type: Manual

Language: EN

Uploaded: April 20, 2026, 8:05 p.m.

Manual Publish Date: 2016-01-01

Basic Operation of the VD4 Vacuum Circuit-Breaker

The VD4 vacuum circuit-breaker is designed for indoor use in air-insulated switchgear systems. It is capable of handling various switching conditions, including normal operation, fault conditions, and short-circuits.

Key Operational Aspects:

  • Switching Frequency: Particularly advantageous in networks with high switching frequencies or a significant number of short-circuit breaking operations.
  • Auto-reclosing: Suitable for auto-reclosing sequences, offering high operating reliability and a long service life.
  • Structure: Available in fixed installation units or mounted on chassis, typically in a column form.
  • Operating Mechanism: Utilizes a stored-energy spring mechanism, which can be charged manually or automatically via a charging motor.
  • Control: Operation can be initiated via mechanical ON/OFF push-buttons or through electrical control units.
  • Safety Features: Includes various releases (shunt, undervoltage, indirect overcurrent) and blocking magnets for protection and safe operation.
  • Maintenance: Designed for low maintenance, with the vacuum interrupters being maintenance-free during their working life. Regular inspection and servicing are recommended based on operating cycles and environmental factors.
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