page_158

< previous page | page_158 | next page >

Page 158

| Figure 9-1 Trip-free mechanism system. |

| close contacts will still be made up). The antipump feature prevents this situation by requiring an auxiliary relay to be reset (by moving the control handle to the neutral position) before another close operation can be achieved. |

| Automatic Reclosing Feature |

| Some circuit breakers can be automatically reclosed in accordance with a predetermined pattern, usually by electrically operated mechanisms. A definite but different time delay is inserted in the closing circuit, which is automatically energized a predetermined number of times before becoming locked in a de-energized or open position. For example, the breaker may be |

< previous page | page_158 | next page >