| 摘要 |
<p>A fail-safe ground fault (GF) circuit interrupter (2) includes separable contacts (SCs) (4); operating mechanism (OM) (6); and GF trip circuit (8) including analog GF circuit (10) having power supply input (12), and a number of: (a) GF current transformer (CT) (16), first resistor (18) in series with the GF CT, capacitor (20) in parallel with this series combination, and second resistor (22) between the power supply input and a common connection point (24) between the first resistor and the capacitor, (b) trip actuator (28) cooperating with the OM, and zener diode (30) including cathode (32) interconnected with the power supply input and anode (34) interconnected with the trip actuator, (c) trip solenoid (38) cooperating with the OM, bi-directional light emitting diode (LED) (40), and resistor (42) in series with the LED, this series combination in parallel with the trip solenoid, and (d) first silicon controlled rectifier (SCR) (46) cooperating with the OM, and second SCR (48) cooperating with the OM, the second SCR in parallel with the first SCR.</p> |
