| 摘要 |
A ring trip arrangement for a ringing circuit including a ring trip relay having dual winding coils, rectifying means and capacitive means arranged in two series-shunt circuit combinations. Each of these circuit combinations exhibit under alternating current flow conditions substantially equal and offsetting electrical parameters including subtracting electromagnetic flux fields to maintain an inoperative energization state for the relay. Under direct current flow conditions, balanced flux fields of the relay coils are upset and the ring trip relay is operated.
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