POWER METER DISCONNECT SWITCH OPERATION

摘要

Techniques are disclosed herein for improved power meter disconnect switch operation, which may include opening and/or closing of the disconnect switch. In particular, for reasons such as reduction of electromechanical stress on the disconnect switch, the disconnect switch may be operated based, at least in part, on a voltage at the load side of the disconnect switch. For example, in some cases, the disconnect switch may be opened slightly before a zero crossover of a waveform corresponding to the load side voltage. As another example, in some cases, the disconnect switch may be closed slightly before or slightly after a zero crossover of a waveform corresponding to the load side voltage.

主权项

1. A system for operating a disconnect switch based, at least in part, on a load side voltage in a power meter coupled to a voltage source through a first and second source side contacts, the power meter coupled to a load through a first and second load side contacts, the power meter measuring power flowing from the voltage source to the load, the system comprising:
the disconnect switch interposed between the first source side contact and the first load side contact and between the second source side contact and the second load side contact, the disconnect switch interrupting a flow of power from the voltage source to the load when the disconnect switch is in an open position; a first bypass resistor coupled between the first source side contact and the first load side contact, a second bypass resistor coupled between the first source side contact and the second load side contact, a load side voltage sensor coupled to the first load side contact and the second load side contact, the load side voltage sensor measuring a first load side voltage from the first load side contact and measuring a second load side voltage from the second load side contact; and one or more processing components that perform operations comprising:
receiving a request to close the disconnect switch;making a determination, based, at least in part, on the first load side voltage, of when to issue a command to close the disconnect switch; andissuing the command to close the disconnect switch.