Description

Technical

Wiring

Description

The three-phase din-rail mounted energy meter features a pen-type LCD display and serves as a modular AC power measurement terminal—a highly integrated product designed for AC power parameter measurement applications. It offers a range of functions including three-phase AC power measurement and calculation, energy metering accumulation, harmonic analysis, voltage and current unbalance analysis, complex tariff-based energy metering, peak demand measurement, 4-channel digital input, and 2-channel relay output. The meter also includes a communication interface for connection to computer monitoring systems, supporting the RS485 interface and the MODBUS communication protocol, enabling the transmission of measured data and device status. This three-phase rail-mounted energy meter can be widely deployed across various industries—such as power utilities, telecommunications, railways, transportation, environmental protection, petrochemicals, and steel manufacturing—to monitor the power consumption of AC equipment.

Function

Measurement and calculation of three-phase voltage, three-phase current, total active power, total reactive power, active and reactive power for each phase, power factor, phase-specific power factor, system frequency, total active energy consumption, total reactive energy consumption, etc.
4 sets of multi-rate electricity metering functionality
Voltage and Current Unbalance (Optional)
Maximum Demand Measurement and Demand Time Recording (Optional)
Harmonic content ratio: Measurement and calculation functions for the total harmonic distortion (THD) of voltage and current, 2nd–31st harmonic components of current and voltage, total odd-harmonic distortion, even-harmonic distortion, voltage harmonic factor, voltage peak factor, current K-coefficient, etc. (Optional)
Equipped with a 50-event recording function for real-time storage of occurring discrete alarm events. (Optional)
Active and reactive power consumption for each phase
Supports RS485 interface with MODBUS-RTU communication protocol or DL/T645 protocol (optional).
2-channel discrete input monitoring (supports up to 4 channels), 2-channel relay output (optional)

Features

Powerful data acquisition and processing capabilities.
High safety and excellent reliability: Various anti-interference measures have been implemented during the design process, ensuring stable operation in power system environments. The static discharge immunity rating is Level 4; the electrical fast transient pulse train immunity rating is Level 4; the high-voltage impulse immunity rating is Level 4; the surge immunity rating is Level 3; the panel protection rating complies with IP54, and the housing protection rating complies with IP20.
Compact size, easy installation: Compact dimensions; features a 35 mm standard DIN rail mount for convenient on-site installation and wiring.
Convenient and flexible system wiring: The system wiring methods include the three-phase four-wire system and the three-phase three-wire system. (Users may configure these settings themselves; however, the wiring diagram must be updated accordingly.)
Intuitive display and user-friendly operation: The dedicated segment LCD module, combined with a meticulously designed Chinese graphical display interface, enables the real-time display of multiple pieces of information; its bright backlight ensures that operators can accurately read the data even in low-light conditions. The user-friendly operation interface allows operators to quickly master tasks such as reading data and configuring parameters.

Technical

Function			Parameter
Display	Power distribution network		Single-phase; three-phase three-wire; three-phase four-wire
	electricity press	Rated value	AC100V,220V,380V (please specify this when placing your order)
		overload	Measurement: 1.2×; Instantaneous: 2×/10s
		power dissipation	<0.1 VA (per phase)
		impedance	>1MΩ
		accuracy	Accuracy class: 0.2; RMS (Root Mean Square) measurement
	electricity stream	Rated value	AC 2.5 mA, AC 1 A, 5 A (please specify this when placing your order)
		overload	Measurement: 1.2x; Instantaneous: 10x/1s
		power dissipation	<0.4 VA (per phase)
		impedance	<10mΩ
		accuracy	Accuracy class: 0.2; RMS (Root Mean Square) measurement
	frequency		40–65 Hz; Accuracy Class: ±0.02 Hz
	power		Three-phase total active and reactive power – Accuracy: 0.5
	electric energy		Four-quadrant power metering: active power accuracy ±0.5%, reactive power accuracy ±1%
	Deviation (Optional)		Voltage deviation: 0.2%; Frequency deviation: 0.02%
	Unbalance (Optional)		Voltage: 0.2% \| Current: 0.2%
	Harmonic Content Rate (Optional)		Uh> 2%:5% Uh Uh≤2%:0.1% UN
	Multiple-rate pricing (Optional)		Featuring 4 multi-rate tariff plans (4 different rates across 12 time slots)
	Demand (Optional)		Maximum monthly demand over the past three months
	show		Pen-based LCD display
	Event (Optional)		Real-time cyclic storage of 50 alarm events
source	working range		AC、DC 85V~265V
	power dissipation		≤4VA
output	digital interface		RS-485, MODBUS-RTU protocol
	Digital input (optional)		4-channel discrete input (dry contact interface)
			Ri <500 Ω – connected; Ri> 100 kΩ – disconnected
	Digital output (optional)		2-channel relay output
			Relay contact rating: 5 A/250 V AC; 5 A/30 V DC
environment	work environment		-10~55°C; altitude ≤ 2000 m; 93% RH; no condensation; no corrosive gases
	Storage Environment		-30~70℃
safe	withstand voltage		Input and power supply> 2 kV; Input and output> 2 kV; Power supply and output> 2 kV
	insulation		Input, output, and power supply to the chassis:>5 MΩ