| 摘要 |
<p>An open neutral sensing circuit (88) includes a first sensing resistance contacting a first line (90) and a neutral (94). A second sensing resistance contacts a second line (92) and the neutral (94) and has a value greater than the first sensing resistance. A control switch (96,98) contacts the first line and the neutral (94). The control switch is configured to switch from a first state to a second state when the voltage drop across the first sensing resistance is equal to the voltage drop across the second sensing resistance.</p> |
