P&B’s range of English Electric air breaker replacements have been designed for total reliability. Utilising the ABB VD4 vacuum circuit breaker, our English Electric retrofits are relied upon for achieving trouble-free performance over many thousands of maintenance free operations.

English Electric E3 retrofit

Type E3 Vacuum Circuit Breaker Retrofit

Utilising many parts from the original truck, including the original frame, pokers, cluster pots and interlock mechanism, the Type E3 replacement circuit breaker fits perfectly into your existing cubicle with only minimal alterations to the existing front door.

All current carrying parts are fully refurbished and re-plated and all cluster springs are replaced. The unit is completely re-wired to your specific requirements. Many options including fused versions are already designed and available for this unit sometimes above your original specification.

Retrofit Circuit Breaker Type E3 Ratings
Maximum System Voltage kV 3.3
Rated Power Frequency Withstand kV 10
Basic Impulse Level kVp 40
Normal Rated Current A 630 to 1600
Short Circuit Breaking Current kA up 31.5 rms (150MVA)
Short-Time Current kA 3secs. 31.5
Peak Making Current kAp 80
Mechanical Endurance Performance >10,000 Operations

Type E7 and E8 Vacuum Circuit Breaker Retrofit.

Utilising many parts from the original truck, including the original frame moulding and interlock mechanism, the Type E7 and E8 replacement circuit breakers fit perfectly into your existing cubicle with no alterations to the existing unit. All current carrying parts are fully refurbished and re-plated and all cluster rings are replaced with our improved type tested design.

The unit is completely re-wired to your specific requirements. We have some units in stock so don’t hesitate to call and discuss your requirements.

Retrofit Circuit Breaker Type E7 and E8 Ratings
Maximum System Voltage kV 11
Rated Power Frequency Withstand kV 28
Basic Impulse Level kVp 75
Normal Rated Current A 1600, 2000, 2500 and 3000
Short Circuit Breaking Current kA up 53 rms (1000MVA)
Short-Time Current kA 3secs. 53
Peak Making Current kAp 137
Mechanical Endurance Performance >10,000 Operations
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P&B

P&B is a leading UK innovator of electrical protection, safety and control technologies.

Our specialist expertise and unrivalled experience is relied upon in heavy industries throughout the world to ensure the highest levels of safety and performance.

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