TYPE OF HIGH VOLTAGE HIGH TENSION CIRCUIT BREAKERS

TYPES OF HT BREAKERS AND THEIR IMPORTANCE IN ELECTRICAL SYSTEMS

An HT (High Tension) Breaker acts as an electrical switching device in high voltage systems to protect equipment from faults by interrupting fault current. This device ensures the safety, reliability, and stability of the entire power system.

1. What is an HT Breaker?

An HT Breaker is an electrical switching device operating in high voltage systems to prevent equipment damage and maintain operational safety.

2. Common Types of HT Breakers:

+ Oil Circuit Breaker (OCB): Uses insulating oil and oil compression to quench the arc; commonly used in older installations and suitable for high voltage systems.

+ Air Blast Circuit Breaker (ABCB): Uses a high-pressure air blast to quench the arc, providing fast arc extinction and application in medium to high voltage networks.

+ Vacuum Circuit Breaker (VCB): Uses a vacuum environment to quench the arc. This type features a compact design, high reliability, low maintenance, and is widely used in indoor switchgear.

+ SF6 Circuit Breaker: Uses SF6 gas to quench the arc with high dielectric strength and excellent arc-quenching capability, specialized for extra-high voltage systems.

+ Minimum Oil Circuit Breaker (MOCB): Uses a small quantity of oil for arc extinction, making it safer than OCB and requiring less maintenance effort.

3. Advantages and Importance

+ Advantages: Protects equipment from short circuits and overloads, ensures power system safety, performs fast and reliable fault interruption, and reduces maintenance costs as well as downtime.

+ Importance: Prevents damage to transformers and other equipment, maintains power continuity and reliability, enhances safety for personnel and the system, and serves as an essential component in high voltage networks.

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