1. Electric energy metering and pulse output: Provide energy metering, 2 channels of electric energy pulse output function and RS485 digital interface to complete the display and remote transmission of electric energy data. The meter 3 rows of 12 LEDs realize the display of the primary side data of active energy (positive) and reactive energy (inductive). The figure on the right shows the positive active energy data = 369587.28kWh (degrees); the light of the collector level is open. The electric energy pulse (resistance signal) of the coupling relay realizes the remote transmission of active electric energy (forward) and reactive electric energy (reverse). The total number of pulses collected by the remote computer terminal, PLC, and DI switch acquisition module is used to realize the electric energy accumulation measurement. The output of the non-use output method is still the method of the accuracy test of the electric energy (National Metrology Regulations: the pulse error comparison method of the standard meter).
1). Electrical characteristics: collector switch voltage VCC≤48V, current Iz≤50mA.
2). Pulse constant: 3200imp/kWh pulse speed does not exceed 200mS at the fastest. Its meaning is: when the meter accumulates 1kWh, the number of pulse outputs is N (3200). It needs to be emphasized that 1kWh is the secondary electrical energy data. In the case of PT, CT, the relative N pulse data corresponds to 1 time The side electric energy is 1kWh×voltage transformation ratio PT×current transformation ratio CT.
3). Application example: The PLC terminal uses a pulse counting device, assuming that the number of pulses collected during a period of time t is N, and the meter input is: 10kV/100V, 400A/5A, then the meter's electrical energy accumulates in this period of time It is: N/3200×100×80 degree electric energy.
Nov 11, 2022
