ND3605 Three-Phase Energy Meter Field Calibrator

Product Introduction

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

☆ Online real-load detection of the comprehensive error of metering equipment without power interruption, without altering the metering circuit, and without opening the metering device.

☆ Accurately measures various electrical parameters such as voltage, current, active power, reactive power, phase angle, power factor, and frequency, thereby calculating the measurement error of the test equipment circuit.

☆ Optional virtual load box allows accurate measurement of the electric meter even when the user has no load or ultra-low load.

☆ Displays the vector diagram of the measured voltage and current, enabling users to determine the correctness of the metering device wiring through vector analysis. Additionally, in a three-phase three-wire wiring configuration, it can automatically identify 48 types of wiring methods; features automatic calculation of retroactive energy, facilitating the calculation of retroactive energy for users with wiring issues.

☆ The current loop can be measured using clamp-type transformers, allowing operators to perform measurements conveniently and safely without disconnecting the current circuit.

☆ Capable of calibrating indicating instruments such as voltmeters, ammeters, power meters, and phase meters, as well as various active and reactive energy meters in three-phase three-wire, three-phase four-wire, and single-phase configurations at 1A and 5A.

☆ Supports electric energy meter calibration via optical, manual, pulse, and other methods.

☆ Measures and analyzes the AC power quality supplied from the public grid to the user end, including frequency deviation, voltage deviation, voltage fluctuation, permissible three-phase voltage unbalance, and grid harmonics.

☆ Displays single-phase voltage and current waveforms, and can simultaneously display three-phase voltage and current waveforms.

☆ Load fluctuation monitoring: Measures and analyzes fluctuations in power quality caused by various electrical equipment under different operating conditions. Records and stores electrical parameters such as voltage, current, active power, reactive power, apparent power, frequency, and phase.

☆ Dynamic monitoring of power equipment adjustment and operation processes, assisting users in resolving issues during equipment adjustment and commissioning.

☆ Optional barcode scanner for automatic entry of electric meter barcodes.

☆ Detects the 485 communication interface of electric meters and meets the requirements for on-site calibration of multifunctional (smart) electric meters. Performs error calibration of demand based on the demand period and slip time set in the meter.

Product Features

☆ Equipped with perpetual calendar and clock functions, displaying the date and time in real time. Can save test data and results during on-site calibration and upload them to a computer via a serial port, enabling computerized data management through backend management software (optional accessory); features a USB port for direct data transfer to a USB drive.

☆ Uses a large-screen imported color LCD as the display, with a Chinese graphical operation interface and Chinese prompt messages. The multi-parameter LCD display interface offers a user-friendly human-machine interaction experience.

☆ Compact and lightweight for easy portability, suitable for both on-site measurements and use as a standard metering device in laboratories.

Technical Parameters

☆ Input Characteristics

      Voltage Measurement Range: 0~400V, with automatic range switching across four ranges: 57.7V, 100V, 220V, and 400V.
      Current Measurement Range: 0~5A, with built-in transformer at 5A (CT) range. Clamp-type transformers include six ranges: 5A (small clamp), 25A (small clamp), 100A (medium clamp), 500A (medium clamp), 400A (large clamp), and 2000A (large clamp). (Medium and large clamp meters are optional.)
      Phase Angle Measurement Range: 0~359.999°.

      Frequency Measurement Range: 45~55Hz.

☆ Accuracy

       Metering Calibration Section:
        Voltage: ±0.05%（±0.1%）
        Current: ±0.05%（±0.1%）（±0.5% for clamp-type transformers）
        Active Power: ±0.05%（±0.1%）（±0.5% for clamp-type transformers）
        Reactive Power: ±0.3%（±0.5%）（±1.0% for clamp-type transformers）
        Active Energy: ±0.05%（±0.1%）（±0.5% for clamp-type transformers）
        Reactive Energy: ±0.3%（±0.5%）（±1.0% for clamp-type transformers）
        Frequency: ±0.05%（±0.1%）

        Phase: ±0.2°

☆ Power Quality

       Fundamental Voltage and Current Amplitude: Fundamental voltage allowable error ≤0.5％F.S.; fundamental current allowable error ≤1％F.S.
       Measurement Error of Phase Difference Between Fundamental Voltage and Current: ≤0.5°
       Harmonic Voltage Content Measurement Error: ≤0.1％
       Harmonic Current Content Measurement Error: ≤0.2％

       Three-Phase Voltage Unbalance Error: ≤0.2％

☆ Operating Temperature

       Operating Temperature: －10℃~ +40℃

☆ Insulation

       Insulation Resistance Between Voltage/Current Input Terminals and Chassis: ≥100MΩ.

       Withstand Test Between Power Input Terminal and Chassis: 1.5KV (RMS) at power frequency for 1 minute.

☆ Standard Electric Energy Pulse Constant

       Standard Electric Energy Pulse Constant: Built-in transformer constant (FL) = 10000 r/kW·h,
       Clamp-Type Transformer Constant (FL):

☆ Weight

      Weight: 2Kg

☆ Dimensions

       Dimensions: 32cm×24cm×13cm