Three-Phase Energy Meter Calibration Device

MOEORW-WNX90 Three-Phase Energy Meter Calibration Device

         This is an integrated‑source three‑phase energy meter calibration device available in 0.05‑class and 0.1‑class accuracy versions. It is applied for error testing and functional tests of three‑phase energy meters of class 1.0 and below. Adopting DDS digital waveform synthesis and ARM embedded main controller, the unit achieves output stability ≤0.02%/120S and waveform distortion ≤0.5%, complying with relevant metrological verification specifications. It supports continuous automatic operation connected to automation systems as well as standalone verification without a PC, adapting to procurement and application scenarios of different scales.

1.Device class: 0.05 class, 0.1 class

2.Computer connection port: RS232 communication port

3.Three-phase source technical parameters:

Output voltage:

3 * 57.7VY 3*100V ∆

3 * 220V Y 3*380V ∆

Adjustment range: 0-120% continuously adjustable

Fineness adjustment: better than 0.01%

Output current: 25mA, 0.1A, 1A, 5A, 25A, 100A

The adjustment range is continuously adjustable from 0% to 120%; the adjustment fineness is better than 0.01%.

Minimum output current: 1mA (Accuracy: <5%)

Output power: (voltage circuit) 3×50VA

(Current loop) 3×150VA

Output voltage, current, and power stability: ≤0.02%/120S

Output voltage and current waveform distortion: ≤0.5%

Three-phase symmetry: better than 120° ± 0.3°

Frequency range: 45Hz～65Hz; Adjustment fineness: 0.01Hz

Phase shift range: -180.0°～180.0° Adjustment fineness: 0.01°

Indicating instrument rating: Voltmeter and ammeter accuracy is ±0.01%.

The phase meter accuracy is ±0.01°.

The frequency meter has an accuracy of ±0.01Hz.

4.Built-in three-phase standard meter technical parameters:

Voltage input

Input range (V): 40-480

Input range (V): 60, 120, 240, 480

Overload capacity (V): 600

Input load: ≤0.5mA (480V)

Current input

Input range (A): 0.01~100

Input range (A): 100, 50, 25, 10, 5, 2.5, 1, 0.5, 0.25, 0.1, 0.05, 0.025

Overload capacity (A): 150

Accuracy

Accuracy level: 0.05 (0.1A~120A)

Power measurement accuracy

Active power measurement accuracy: 0.05%/0.1% (PF≥0.5)

Reactive power measurement accuracy is 0.1% and 0.2% (PF≥0.5).

Accuracy of electrical energy measurement

Active energy measurement accuracy is 0.05% and 0.1% (PF≥0.5).

Reactive energy measurement accuracy is 0.1% and 0.2% (PF≥0.5).

5.The device has comprehensive protection functions: voltage short circuit protection, current open circuit protection, load overload protection; display overvoltage protection.

6.It can perform 2nd to 21st harmonic tests, voltage interruption and drop tests, and the harmonic amplitude is adjustable.

7.Power supply: 230V ± 10% ~ 50Hz

8.Maximum power consumption: 300VA

9.Working environment: Temperature 20℃ ± 5℃, Relative humidity ≤ 85%

1. Controlled output fluctuation enables testing for multiple types of three‑phase meters without frequent hardware module replacement.
2. Raw test records can be used for test filing and submission for metrology audit.
3. Versatile communication interfaces allow connection with external verification software and production‑line management systems, supporting data export and device firmware upgrade.
4. Highly integrated signal source and reference metering unit eliminate extra metering hardware. Test data can be stored locally and archived via USB flash drive.
5. Multi‑layer hardware protection reduces risks caused by mis‑operation and working‑condition fluctuation.
6. Complete basic verification can be performed without a PC. It is suitable for long‑term non‑stop continuous testing as well as laboratories with limited workstations.

Prodection detail

Energy meter manufacturers: Finished‑product factory quality inspection, mass continuous verification on automatic production lines

Power industry: Metrological verification tasks for power metering centers and power‑supply authorities at all levels

Third‑party testing organizations: Meter type test and functional test in metrology laboratories

Scientific research & education: Electric‑energy‑related experimental research for research institutes and university laboratories

Grassroots entities: Routine energy‑meter calibration for small‑scale testing organizations and operation‑maintenance sites

More About Us

• Waveform Power Amplifier Unit: 36000‑point DDS waveform interpolation, 300 KHz PWM digital power amplifier with efficiency above 90%. Controlled temperature rise brings low accuracy drift during long‑time operation. A constant‑temperature crystal oscillator is equipped for meter timing‑error test.
• Human‑machine Structure: 7‑inch touch screen, aluminum alloy cabinet, detachable meter fixture. All basic verification functions are pre‑installed with no extra activation required.
• Optional Modules: 2‑21 order harmonic superposition, voltage dip & interruption simulation, 485 meter communication test.
• Structural Features: Modular assembly. Units in one batch adopt unified components for interchangeable spare parts. Program logic can be adjusted for production‑line linkage. The device is ready‑to‑use after power‑on. Fault messages are displayed on screen for self‑diagnosis of basic failures.