ME437 3-Phase Power Meter

The ME437 Three-phase Power Meter is a multifunction power meter designed for power analysis and energy metering in various applications. Here are the key specifications and features of this device:

 Application
It is suitable for power analysis and energy metering
Input Types: It accepts external CT (333mV only) and External Rogowski coil inputs
Display: It features a 3.5-inch TFT screen with a resolution of 320x480
Sampling Rate: The meter samples at a rate of 8k samples per second
Mounting Mode: It is designed for panel mounting
Harmonics: It can measure up to the 52nd harmonic

Connectivity Advantages
Support Extra Sensors: It can be connected to external sensors like a 333mV CT (Current Transformer) or a Rogowski coil.

Programmable Digital Output
It features a relay for digital output.
I/O Function: It has one digital output.
Power Supply: It can operate within a wide voltage range of 85~265V AC/DC.
Storage: The meter comes with a 4GB SD card for data storage, with a default saving interval of 1 minute.

Feature
Poles Description: The meter supports 3PH4W, 3PH3W, 1PH2W (L-N), 1PH2W (L-L), and 1PH3W (L-L-N) configurations.

Display Characteristics
Display Type: 3.5-inch TFT screen.

Mechanical Characteristics
Weight: 350g. Dimensions: 96x96x99mm (LWD)
Instantaneous RMS Values:
Voltage: Provides measurements for U, UTH2, UTH3, UTH4 (Per Phase, AVG).
Current: Measures I, ITHD2, ITHD3, ITHD4 (Per Phase, AVG).
Power: Offers measurements for P, FQ, S, PF (Per Phase, SUM).
Energy: Provides measurements for EP, EFQ, ES, Freq (Per Phase, SUM).
Update Rate: Data Acquisition Rate: 400ms. Display Update Rate: 0.5s.
Calibration: Calibration can be performed for current, voltage, power factor, and energy measurements.
Pulse Output: Pulse rate is changeable based on the rated current.

MODBUS RS485 Communication
It supports MODBUS RTU communication via RS485 port. Communication address, baud rate, parity, data bit, and stop bit can be configured.

Environmental Conditions
Operating Temperature: -25℃ to +55℃. Storage Temperature: -40℃ to +85℃
Humidity Rating: 5 to 95% RH at 50℃ (non-condensing)
Pollution Degree: 2
Overvoltage Category: III, for distribution systems up to 277/480VAC
Dielectric Withstand: As per IEC61010-1, Doubled insulated front panel display
Altitude: Up to 3000m
IP Degree of Protection: IP20
EMC (Electromagnetic Compatibility): The meter complies with various EMC standards.

Measurement Accuracy
Accuracy specifications are provided for current, voltage, power factor, active/reactive power, frequency, and energy measurements.

Measurement Range
Voltage: 80V to 400V AC (or 100 to 500V)
Frequency Range: 50/60Hz
Primary Current Range: Varies depending on the CT or Rogowski coil used.
Control Power: AC/DC: 85 to 265V AC/DC, 3.5W
Output: It has one digital output (relay) with specific ratings and insulation properties.
Wire Diameter for Terminals: Connections use screw terminals with a diameter of 2.5mm² and a 5.08mm interval.
Alarm: Alarms can be set for voltage and current.

Data Record
The meter records data to the SD card in CSV format. Data is recorded at user-defined intervals and includes various parameters related to power, energy, and demand. This power meter is a versatile device suitable for monitoring and analyzing three-phase power systems with multiple measurement capabilities and communication options.