Multi functional tester for on-site calibration of three-phase electric energy meter

Features

● It can automatically or manually calibrate single-phase, three-phase three wire, three-phase four wire active and reactive induction energy meters and electronic energy meters (capable of receiving pulses from electronic energy meters).

Comparison method can be used to verify electrical instruments and transmitters such as voltage, current, power, power factor, phase, and frequency.

● MeasurablePTTheCTSecondary load. Verify the constant of the energy meter and measure the energy in four quadrants.

Simultaneously verify the errors of active and reactive energy meters, as well as the errors of the main and auxiliary meters, and automatically calculate the estimated standard deviation. The active and reactive power errors of the load management terminal and the distribution transformer monitoring and metering terminal can be verified simultaneously through485Or read the meter data (energy reading, date, time, etc.) through an infrared interface and save it.

● HavingRS485TheRS232Far infraredUSBWaiting for standard communication interfaces.

USBInterface: ThroughUDownload the verification work order (including user and meter information) from the marketing system, and after verification is completed, pass itUUpload inspection data to the disk.

RS485Far infrared interface: should also have this2Type of interface; Or adoptRS232Interface conversion, but should be configured to be convertible to this2Supporting accessories for the interface. this2This interface is used to read data such as line degree, voltage, current, power, phase angle, etc. of the calibrated electricity meter and terminal, and can broadcast or command timing of the electricity meter and terminal (based on the time of the calibrator). The communication protocol should supportDL/T645－1997TheDL/T645－2007Communication Protocol for Distribution Transformer Monitoring and Measurement Terminal of Guangdong Power Grid Company(0903edition)Communication Protocol for Load Management Terminal of Guangdong Power Grid Company(0903edition)Wait.

The self calibration function of the clamp gauge ensures the long-term accuracy stability of the clamp type transformer; Minimum Test Current Capability:5Aor1AReached with pliers1mACan be found at the new installation sitePTTheCTPerform wiring inspection under no-load conditions. Each phase self checks with each other to ensure the long-term accuracy and stability of the instrument.

Barcode scanning input. Through an external barcode scanner（USBInterface or wireless method), read the asset number and lead seal number of the electricity meter for easy on-site input.

● Touch screen handwriting input. Support handwritten Chinese character input, facilitating on-site input of customer information.

The system adopts domestic technologyshouThe digital true reactive power measurement technology created. Truly achieving reactive power measurement without being affected by voltage and current imbalance, phase asymmetry, frequency changes, etc,shouImprove reactive power accuracy to0.1%.

The instrument has no potentiometer,chePrevent instrument errors from changing due to external factors such as transportation,Greatly improved the stability and reliability of the system. at-20℃～+40Ensure the accuracy of electrical energy within the temperature range of ℃（0.1%Or0.05%）.

● Can be carried0.2 Grade5AClamp (including non repetitive opening and closing errors, contact errors, external magnetic field interference errors, angle differences, etc.).

● Can be carried20AThe100AThe500AThe1000AClamp, directly measure the comprehensive error of low-voltage measurement, and5AClamp fit, direct measurementCTChange ratio.

Voltage automatic shifting30～480VDirect input of current5A.

● Wide working power supplyAC 57.7～480VAnd it can be powered by an internal battery (charging does not require an external charger) with dual options.

● Common three-phase three wire identification in four phase limits48 Three phase four wire96 Wrong wiring, displaying a hexagonal diagram of any wiring.

Capable of measuring three-phase voltage and current2～51 Sub harmonic and can store all harmonic data.

It can display waveforms of three voltages and three currents simultaneously.

● Storage1000All measurement data of the block table, including working parameters, facilitates post analysis.

● Can be combined withPCMachine for communication,It is very convenient to interface with existing databases and management systems. Can be matched《PECElectric Energy Meter Management System "Software,Realize paperless office.

● Chinese character input. SupportUDisk, can be accessed throughUUpgrade software for disk and serial port, and upload and download verification data with the marketing system.

High precision plastic mold chassis design, lightweight and beautiful.

Multi functional tester for on-site calibration of three-phase electric energy meter

technical indicators

1Input characteristics

Voltage measurement range:0～400V，57.7VThe100VThe220VThe400VFour speed automatic range switching.

Current measurement range:0～5AThe built-in transformers are divided into5A(CT)The file. The clamp type transformer is5A(Small pliers)25A(Small pliers)100A(Middle clamp)500A(Middle clamp)400A(Big pliers)2000A(Big pliers) Six gears. (Medium and large clamp gauges are optional)

Phase angle measurement range:0～359.999°.

Frequency measurement range:45～55Hz.

2Accuracy

Measurement verification section:

Voltage: ±0.05%（±0.1%）

Current: ±0.05%（±0.1%）(Clamp type transformer ±0.5%）

Active power: ±0.05%（±0.1%）(Clamp type transformer ±0.5%）

Reactive power: ±0.3%（±0.5%）(Clamp type transformer ±1%）

Active electrical energy: ±0.05%（±0.1%）(Clamp type transformer ±0.5%）

Reactive energy: ±0.3%（±0.5%）(Clamp type transformer ±1%）

Frequency: ±0.05%（±0.1%）

Phase: ±0.2°

3Power quality

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

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

Measurement of harmonic voltage contentwuDifference: ≤0.1％

Measurement of harmonic current contentwuDifference: ≤0.2％

Three phase voltage imbalancewuDifference: ≤0.2％

4Working temperature

Working temperature: -10℃～+40℃

5Insulation

⑴. The insulation resistance of the voltage and current input terminals to the casing is ≥100MΩ.

⑵ The working power input terminal is subjected to power frequency between the shell and the working power supply1.5KV(Effective value), duration1Minute experiment.

6Standard electric energy pulse constant

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

Clamp type transformer constant（FL）：

7Weight

Weight:2Kg

8Volume

Volume32cm×24cm×13cm

Product Introduction

It is a small, lightweight, simple and practical metrological verification tool that can be used to verify the errors of electric energy meters on site, check whether the wiring of measuring devices is correct, detect the transformation ratio and polarity of measuring current transformers, and measure the quality of user electrical energy (including voltage harmonics, current harmonics, voltage balance, total harmonic distortion, etc.); Through testing, it can be determined whether the user has engaged in theft of electricity, whether the measurement accuracy meets the requirements of national standards, whether the user has caused harmonic pollution to the quality of the power grid, whether the power factor meets the standard, and to avoid losses in the power system.

Instruments can be optionally selected500AHigh precision clamp type transformer can directly measure and diagnose whether the low-voltage energy metering device is measuring normally, and has the functions of electricity monitoring and phase volt ampere meter. It can be used as a standard and inspection tool in electricity inspection, power supply station, metering, scheduling, relay protection and other departments, and can achieve the functions of various testing instruments; It is a cost-effective optionjiHigh equipment.