The EM519025 is a three-phase, four-quadrant electronic energy meter designed to accurately measure and record active energy consumption in a 50Hz single-phase AC network. It features a backlit LCD display, RS485 communication (Modbus protocol), and multi-tariff functionality. Known for its reliability, compact size, lightweight design, attractive appearance, and easy installation.
The EM519025 is a three-phase, four-wire electronic ct connected type energy meter designed to accurately measure and record active energy consumption in a 50Hz single-phase AC network. It features a backlit LCD display, RS485 communication (Modbus protocol), and multi-tariff functionality. Known for its reliability, compact size, lightweight design, attractive appearance, and easy installation.
Voltage: 3×220/380V
Current: 3×1.5(6)A
Pulse Constant: 12000imp/kWh
LCD Display: LCD5+3
Frequency: 50Hz
Accuracy class: Class 1, Class 2
Power consumption: ≤2W, <10VA
Standard: Performance Test: GB/T 17215.321-2008 GB/T 17215.211-2006, Protection Level: GB/T20138-2006
3.1 Measurement Functions
Measures active and reactive energy, supporting both forward and reverse measurement, with four tariffs.
Three metering modes (forward, forward+reverse, forward-reverse) can be set based on the configuration code.
CT ratio setting range: 5:5-7500:5 (Specific LCD display configurations based on CT ratio)
Supports maximum demand measurement
Energy reset function
Holiday and weekend tariff settings
3.2 Communication FunctionsSupports both IR (infrared) and RS485 communication. IR supports EN62056(IEC1107) protocol, and RS485 supports Modbus protocol.
3.3 Display FunctionsDisplays total energy, tariff energy, three-phase voltage, three-phase current, power, apparent power, power factor, frequency, demand, CT ratio, pulse output, communication address, and more (refer to the LCD display content table for details).
3.4 ButtonsTwo buttons for selecting display content, setting CT ratio, LCD scrolling time, resetting energy, and adjusting backlight mode. IR can be used to set automatic scrolling content.
3.5 Backlit DisplayThree display modes can be set via buttons: keypress-activated, always on, always off.
3.6 Pulse OutputFour pulse output modes can be set via communication: 12000/1200/120/12.
Note:
CT ratio setting: The LCD display configuration varies based on the CT ratio setting.
Multi-tariff: The meter supports up to four different tariffs.
Communication protocols: Both IR and RS485 communication protocols are supported for flexible integration.
Customizable display: Users can customize the displayed parameters.
4. The importance of CT-connected energy meters
Safety:
Isolation: CTs (Current Transformers) provide electrical isolation between the high-voltage primary circuit and the low-voltage secondary circuit connected to the meter. This significantly reduces the risk of electrical shock to personnel during installation, maintenance, and operation.
Reduced Current: CTs step down the high current flowing in the primary circuit to a much lower, safer level for the meter to measure.
Accuracy and Reliability:
High Accuracy: CTs are designed to provide accurate current measurements, leading to more precise energy readings.
Reduced Interference: CTs minimize the impact of electromagnetic interference on the meter's measurements, ensuring reliable and accurate data.
Versatility and Flexibility:
Wide Current Measurement Range: CTs enable the measurement of high currents that would otherwise exceed the capabilities of the meter itself.
Flexibility in Installation: CTs can be installed around existing conductors, allowing for easier installation and retrofitting in existing systems.
Cost-Effectiveness:
Reduced Metering Costs: CTs can reduce the overall cost of metering by enabling the use of lower-cost meters for high-current applications.
Improved Grid Management:
Enhanced Grid Stability: Accurate and reliable current measurements are crucial for grid stability and efficient power distribution.
CT-connected energy meters offer a safer, more accurate, and more versatile solution for measuring energy consumption in high-current applications.
No Distributor or middleman, Factory-Direct!!!
