WZDN-30A Three phase Energy Meter On site Calibration Instrument

The WZDN-30A three-phase electric energy meter on-site calibration instrument is a high-precision testing instrument developed and researched by our company, which integrates measurement of electrical parameters, calibration of electric energy meters, and wiring judgment. The instrument is equipped with high-precision and high linearity voltage transformers and current transformers, which enable the instrument to measure various parameters with high accuracy. At the same time, it is equipped with clamp type current transformers, which make on-site wiring simple and can be directly connected without disconnecting the current circuit.

The instrument adopts a large screen color LCD as the display, with a fully Chinese graphical operation interface and a LCD display interface with Chinese character prompt information and multi parameter display. The human-machine dialogue interface is friendly, and the vector diagram display and wiring judgment provide a reliable basis for checking the correctness of the circuit. The fully touch conductive silicone keyboard has a good operating feel and is easy to learn. The instrument is equipped with a large capacity built-in power failure data storage, which can save on-site verification data and store up to 1000 sets of on-site verification results. It can provide backend microcomputer management software to upload the results to the computer for computerized management.

The instrument adopts an engineering plastic shell independently designed and manufactured by our company, which has a beautiful and practical appearance. The on-site testing operation is convenient.

Electric energy meter calibrator, electric energy meter on-site calibrator, three-phase electric energy meter on-site calibrator, electric energy performance calibrator.

1. The instrument is a high-precision testing device that integrates the verification of energy meters, electrical parameter testing, and detection of power quality issues such as waveform distortion, voltage fluctuations, and three-phase imbalance in the power grid.

2. Under the condition of no power outage, no change to the measuring circuit, and no opening of the measuring equipment, the comprehensive error of the online real load detection measuring equipment.

3. Accurately measure various electrical parameters such as voltage, current, active power, reactive power, phase angle, power factor, frequency, etc., in order to calculate the measurement error of the testing equipment circuit.

4. Optional virtual load box, which can accurately measure the electricity meter even when the user has no load or ultra-low load.

5. It can display the vector diagram of the measured voltage and current, and users can analyze the vector diagram to determine the correctness of the wiring of the measuring equipment. At the same time, in the three-phase three wire wiring mode, 48 wiring modes can be automatically determined; The automatic calculation function for supplementary power is convenient for users to calculate the supplementary power for users with wiring problems.

6. The current circuit can be measured using clamp type transformers, and the operator does not need to disconnect the current circuit, making it convenient and safe for measurement.

7. It can verify various indicating instruments such as voltmeter, ammeter, power meter, phase meter, as well as three-phase three wire, three-phase four wire, single-phase 1A, 5A active and reactive energy meters.

8. Electric energy meter calibration can be carried out using photoelectric, manual, pulse and other methods.

9. Measure and analyze the quality of AC power supplied by the public power grid to the user end, including frequency deviation, voltage deviation, voltage fluctuation, allowable three-phase voltage imbalance, and grid harmonics.

10. It can display single-phase voltage and current waveforms and simultaneously display three-phase voltage and current waveforms.

11. Load fluctuation monitoring: measuring and analyzing the fluctuations caused by various electrical equipment in different operating states on the power quality of the public grid. Record and store power parameters such as voltage, current, active power, reactive power, apparent power, frequency, phase, etc.

12. Dynamic monitoring of power equipment adjustment and operation process, helping users solve problems that arise during the adjustment and operation of power equipment.

13. Test and analyze the dynamic parameters of reactive power compensation and filtering devices in the power system, and quantitatively evaluate their functions and technical indicators

14. Equipped with perpetual calendar and clock functions, real-time display of date and time. At the same time as on-site verification, test data and results can be saved and uploaded to a computer through a serial port, and data can be managed through a backend management software (optional accessories) to achieve computerized management.

15. Adopting imported color LCD with a large screen as the display, the Chinese graphical operation interface is equipped with Chinese character prompt information and multi parameter display LCD display interface, and the human-machine dialogue interface is friendly

16. Small in size, light in weight, easy to carry, can be used for on-site measurement, and can also be used as standard measuring equipment in laboratories.

1. Input characteristics

Voltage measurement range: 0~400V, 57.7V, 100V, 220V, 400V with automatic range switching.

Current measurement range: 0~5A, with built-in transformers divided into 5A (CT) levels. The clamp type transformer has six gears: 5A (small clamp), 25A (small clamp), 100A (middle clamp), 500A (middle clamp), 400A (large clamp), and 2000A (large clamp). (Medium and large clamp gauges are optional)

Phase angle measurement range: 0~359.999 °.

Frequency measurement range: 45~55Hz.

2. Accuracy

Measurement verification section:

Voltage: ± 0.02% (± 0.1%)

Current: ± 0.02% (± 0.1%) (clamp type transformer ± 0.2%)

Active power: ± 0.02% (± 0.1%) (clamp type transformer ± 0.2%)

Reactive power: ± 0.3% (± 0.5%) (clamp type transformer ± 1.0%)

Active energy: ± 0.02% (± 0.1%) (clamp type transformer ± 0.5%)

Reactive energy: ± 0.3% (± 0.5%) (clamp type transformer ± 1.0%)

Frequency: ± 0.05% (± 0.1%)

Phase: ± 0.2 °

3. Power quality

Fundamental voltage and current amplitude: The allowable error of fundamental voltage is ≤ 0.5% F.S; The allowable error of fundamental current is ≤ 1% F.S

Measurement error of phase difference between fundamental voltage and current: ≤ 0.5 °

Measurement error of harmonic voltage content: ≤ 0.1%

Measurement error of harmonic current content: ≤ 0.2%

Three phase voltage imbalance error: ≤ 0.2%

4. Working temperature

Working temperature: -10 ℃~+40 ℃

5. Insulation

⑴ The insulation resistance between the voltage and current input terminals and the casing is ≥ 100M Ω.

⑵ The working power input terminal is subjected to a power frequency of 1.5KV (effective value) between the casing, and the experiment lasts for 1 minute.

6. Standard electric energy pulse constant

Standard electric energy pulse constant: Built in transformer constant (FL)=10000 r/kW · h,

Clamp type transformer constant (FL):

7. Weight：2Kg；体积： 32cm×24cm×13cm