Load-side voltage sensing in a power meter
AssigneeItron, Inc.
InventorsAndrew Lancaster, Stephen Ross Sanner
Life of this patent
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Abstract
A load-side voltage detection module for a metrology device includes a plurality of first resistors electrically coupled to a first load-side terminal, the first resistors being in series, a plurality of second resistors electrically coupled to a second load-side terminal, the second resistors being in series, a voltage divider electrically coupled between a first line-side terminal and a second line-side terminal, the voltage divider creating a reference voltage for the load-side voltage detection module, and a pulse generator to generate a pulse based on detection of voltage, the pulse indicating a voltage on at least one of the first load-side terminal or the second load-side terminal, above at least one threshold.
Claims18
A metrology device comprising:
- a load-side voltage detection module including:
- a pulse generator including:
- a first transistor;
- and
- a second transistor, the first transistor and the second transistor configured to generate a pulse on an isolated output;
- and
- a load-side voltage disconnect switch electrically coupled to the load-side voltage detection module, wherein the load-side voltage disconnect switch comprises:
- a first line side including a first load;
- a second line side including a second load:
- a first switch;
- a first resistor included between the first line side and the first switch;
- a second switch;
- and
- a second resistor included between the second line side and the second switch.
A load-side voltage detection module for a metrology device including:
- a pulse generator including:
- a first transistor;
- and
- a second transistor, the first transistor and the second transistor configured to generate a pulse on an isolated output;
- and
- a load-side voltage disconnect switch electrically coupled to the load-side voltage detection module, wherein the load-side voltage disconnect switch comprises:
- a first line side including a first load;
- a second line side including a second load;
- a first switch;
- a first resistor included between the first line side and the first switch;
- a second switch;
- and
- a second resistor included between the second line side and the second switch.
Dependencies are inferred from the claim text.