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A low voltage (less than 1000 VAC) circuit breaker for 15 A typically has a contact resistance of 0.01 Ohm or less.

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14y ago
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11y ago

Within 50 micro ohm for 33KV VCB and within 85 micro ohm for 33KV oil CB

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12y ago

The acceptable value is 25-35 micro ohms

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Q: What is the acceptable value of contact resistance for circuit breaker in service?
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