Advanced instrument packaging for electronic energy meter
View Patent ↗An electronic energy meter and its package is described in which the meter package has a reduced number of parts, and the main circuit board assembly has the metering electronics on board, thereby eliminating the need for flying leads and point-to-point wiring within the package. The energy meter includes a first enclosure portion, a circuit board assembly for performing metering functions, a partial terminal block, and a second enclosure portion. The first and second enclosure portions are mateable with each other to form a meter package, in which the circuit board assembly and partial terminal block are at least partially contained within the meter package.
1. A voltage disconnect link for isolating current and voltage sources in an energy meter having a circuit board assembly, comprising:
a voltage disconnect screw;
a voltage disconnect square nut into which the voltage disconnect screw is detachably mounted to form a screw assembly;
a voltage disconnect slot disposed on the circuit board assembly, the screw assembly slidably mounted therein; and
a voltage disconnect link circuit pad on at least one side of the voltage disconnect slot.
2. The voltage disconnect link according to claim 1 , wherein at one end of the voltage disconnect slot, the voltage disconnect link circuit pad is shorted out with the screw assembly.
3. The voltage disconnect link according to claim 1 , wherein at one end of the voltage disconnect slot, the screw assembly is disposed in a pocket within the energy meter.
4. The voltage disconnect link according to claim 3 , wherein the pocket prevents rotation of the voltage disconnect square nut.