Engine : Electricity - 330/1386
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| The arc resulting from the tripping of a circuit breaker is prevented from damaging the contacts. How is this done? |
| A) directing the arc into an arc chute |
| B) designing the contacts to open slowly |
| C) instantaneous magnetic trip for overload currents |
| D) an inverse timed thermal trip for short circuit currents |
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| Comments |
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