6
2.13. Operating Principle Diagram
This meter circuit, centralized with SOC single chip (with internal measurement module, real
time clock and temperature testing compensation circuit etc.), consists of main control circuit
module, memory circuit module composed of memory chip, power supply circuit module,
cover open detection module, GPRS communication module, LCD display and audio
reminding user information display module as well as IR emission and IR receiving circuit
module etc.
The current sampling uses measurement method of current transformer, while voltage
sampling uses dividing resistance network. The meter adjustment is completed via software
.
LCD Display
Active Pulse output
Reactive Pulse output
Terminal Cover Opening
Detection
LED Warning Indicator
GPRS
Keypad
ASIC
Memory
RS485 Port
Battery
Meter Cover Opening
Detection
Battery Detection
RTC
Infrared Port
Power
Outage
Detection
Breaker
Power Supply
Circuit
3 Phase out
3 Phase in
3 Neutral in 3 Neutral out
Meter Working Principle Diagram
Summary of Contents for SEM 3P V2
Page 1: ...APL SEM 3P V2 Three phase Keypad Energy Meter Technical Manual ...
Page 34: ...29 Smart Meter User Manual ...
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