circuit breaker

Definitions (2)
Popular Terms
1. General: Protective electrical switch that turns itself off (trips) to interrupt flow of electricity, if the current exceeds a preset limit. When the current returns to normal, the circuit breaker is either manually or automatically reset for reuse.
2. Program trading: Measure employed by modern commodity and stock exchanges (which use computerized trading systems) to temporarily halt automated trading when certain conditions (such as a precipitous fall in market prices) occur. Instituted after the third of Black Mondays (October 27, 1997), their objective is to prevent a 'melt down' (free-fall) of the market prices.

Use 'circuit breaker' in a Sentence

If you have a lot of electrical equipment you must have a good circuit breaker so that it all doesn't fry in an emergency.
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The circuit breaker was switched off for some strange reason so all we had to do was flip it back to get power.
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The earthquake early this morning cause a small in town. The only thing that was damage was the circuit breaker.
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