Invention Grant
US09335363B2 Missing or broken neutral monitoring circuit for split phase electrical distribution configurations 有权
用于分相配电配置的中性监测电路缺失或中断

Missing or broken neutral monitoring circuit for split phase electrical distribution configurations
Abstract:
A circuit for indicating a broken or missing neutral in a split phase electrical distribution configuration having an unbalanced load includes: a voltage divider configured to divide the voltage difference between a first line and a second line and to output the divided voltage difference as a virtual neutral; a rectifier including an input of the virtual neutral, the neutral, and an output, the rectifier configured to rectify a voltage difference between the virtual neutral and the neutral; a determination circuit including an input of the rectified voltage difference, a reference voltage and an output, the determination circuit configured to determine if the neutral is missing or broken based on the rectified voltage difference and the reference voltage; and an indicator circuit configured to indicate when the neutral is missing or broken based on the output of the determination circuit.
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