Vacuum Circuit Breakers: A Key Component in Modern Switchgear

The core causes of circuit breaker overheating include overload, poor contact, poor heat dissipation, quality issues, improper operation, and environmental factors. Overload and poor contact are the most common causes.

Overload

When the actual circuit current exceeds the rated current of the circuit breaker for a long period of time, Joule's law indicates that the increased current will cause heat. Simultaneous operation of multiple high-power electrical appliances can also cause circuit breaker overheating.

Poor Contact

Loose screws, insufficient contact pressure, or surface oxidation on the circuit breaker terminals can increase contact resistance, generate excessive heat, and cause the circuit breaker to overheat.

Conductive Component Failure

Loose conductive rods and screw fasteners inside the circuit breaker, or oxidation of components that carry current, can also cause localized overheating, leading to circuit breaker overheating.

Poor Heat Dissipation

Installation environment issues: An overly enclosed or poorly ventilated environment, or accumulation of dust or oil on surfaces, can hinder heat dissipation. ‌

‌Design Flaw‌

The circuit breaker's heat dissipation structure is defective, causing overheating when powered on for extended periods.

Deterioration of insulation materials

Damage in internal insulation components can cause discharge or short circuits, generating abnormal heat.

xDTZ vCB Product

VTZ/CS-12 Vacuum Circuit Breaker

with Lateral Operating Mechanism

1. Rated Voltage: 12kV
2. Operating Mechanism: Lateral operating mechanism.
3. Installation Method: Side-mounted removable high voltage switchgear.
4. Compatible Cabinet: Compatible with KCY1-12 switchgear.
5. Product Compliance with Standards: GB/T1984-2014, GB/T11022-2011.
6. Product Advantages: E2-C2-M2 performance, stability and reliability, excellent insulation performance, and high adaptability.