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What does the endurance test consist of that a UL489 circuit breaker must pass?

ENDURANCE:
The circuit breaker must complete an endurance test:
Operations at rated current and rated voltage;
Followed by no load operation.
The power factor shall be 0.75 to 0.80 lagging.

Frame size Number of cycles of operations
With Without Total
current current
100 A 6,000 4,000 10,000
225 A 4,000 4,000 8,000
400 A 1,000 5,000 6,000
600 A 1,000 5,000 6,000
800 A 500 3,000 3,500
1200 A 500 2,000 2,500
1600 A 500 2,000 2,500
2000 A 500 2,000 2,500
2500 A 500 2,000 2,500
3000 A 400 1,100 1,500


CTA-ID : 9158
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