| 摘要 |
An arc fault circuit breaker includes a housing and two poles therein. Each of the poles includes separable contacts, an operating mechanism structured to open and close the separable contacts, and a thermal/magnetic trip mechanism cooperating with the operating mechanism to trip open the separable contacts. An arc fault trip circuit cooperates with the operating mechanisms to trip open the separable contacts of the two poles whenever an arc fault is detected by the arc fault trip circuit. A shunt is electrically connected in series with a line conductor and a series RC circuit couples a current signal from the shunt to an arc fault trip mechanism. Alternatively, first and second shunts are electrically connected in series with first and second load neutral conductors, and first and second series RC circuits couple first and second current signals from the first and second shunts, respectively, to the arc fault trip mechanism.
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