A
single phase electronic
watt-hour meter comprises an electronic
watt-hour meter measurement unit, a
voltage sampling unit, a current sampling unit, a
light emitting diode (LED), a register and a power source.
Signal output ends of the
voltage sampling unit and the current sampling unit are connected with a
signal input end of the electronic
watt-hour meter measurement unit. A pulse
signal output end of the electronic watt-hour meter is connected with the LED. A register driving output end of the electronic watt-hour meter is connected with the register. A measuring
signal output end of the electronic watt-hour meter measurement unit passes through an isolating circuit to be connected with a test end port. The power source is connected with a power source input end of the electric watt-hour meter measurement unit. According to the technical scheme, the
single phase electric watt-hour meter is reasonable in structure, high in precision, wide in load, low in
power consumption, high in sensitivity, small in size, convenient to install, long in alternative cycle, stable and reliable in running, strong in anti-interference capacity and the like. The
light emitting diode pulse indication is convenient to monitor, optoelectronic isolation pulse interface facilitates function expanding and automatic management, forward
electric energy and backward
electric energy are accumulated, backward
electricity stealing can be effectively prevented, and the
single phase electronic watt-hour meter is a preferred measuring product of a power supply department.