Technical Overview of ZXDN-3 Multi-functional Energy Meter Calibrator

Introduction

In power system metering and operation, on-site verification of energy meters and electrical parameter testing are core tasks to ensure metering accuracy, grid operation stability, and fair electric energy settlement. The ZXDN-3 Multi-functional Energy Meter Calibrator is a field-oriented portable testing instrument that integrates multi-parameter measurement, meter calibration, error detection and phase analysis. It provides power technicians with an efficient, high-precision solution for on-site metering inspection and electrical performance testing.

Core Functional Features

1. Comprehensive Electrical Parameter Measurement

This calibrator covers full-parameter measurement of three-phase power systems, including three-phase voltage, current, active power, reactive power, power factor, phase angle and frequency. With synchronous sampling and high-precision sampling circuits, it can complete multi-indicator detection in a single test, avoiding the need for combined use of multiple instruments and greatly improving on-site testing efficiency.

In addition, the device is equipped with a hexagon vector diagram display function, which intuitively presents the amplitude and phase relationship of three-phase voltage and current. This function helps technicians quickly identify wiring errors, phase sequence faults and phase imbalance problems, providing an intuitive basis for on-site fault diagnosis.

2. On-site Meter Calibration and Error Detection

The ZXDN-3 supports calibration of various types of energy meters and other metering devices, and can perform on-site integrated error measurement. For installed operating energy meters, technicians can complete accuracy verification without removing the meters, which eliminates the power outage and disassembly work required for laboratory calibration, and significantly reduces on-site maintenance costs and operation time.

For current transformer (CT) performance testing, the instrument achieves high-precision CT turns ratio measurement, which can accurately verify the transformation ratio error of on-site CTs, and provides reliable data support for metering loop accuracy evaluation and equipment acceptance.

3. Flexible Current Input and Data Management

To adapt to complex on-site wiring scenarios, the calibrator provides two optional current input modes: terminal direct connection and clamp meter access. Technicians can select the appropriate connection method according to the wiring conditions and test requirements of the site, which enhances the instrument's adaptability in live working and narrow-space testing scenarios.

In terms of data management, the device can store up to 500 groups of test data locally, and supports data communication with a PC. The stored test data can be exported for further analysis, report generation and standardized archiving, which meets the requirements of traceable and manageable on-site test data.

4. Portable and User-friendly Design

The instrument adopts an LCD display with a user-friendly human-machine interface. Test data, vector graphics and function menus are clearly displayed, and the operation logic is simple and easy to learn, which reduces the learning cost for on-site technicians.

With a lightweight and compact portable design, the ZXDN-3 is suitable for mobile testing in substations, industrial parks, commercial metering points and other scenarios, and can meet the operational needs of outdoor and mobile maintenance teams.

Key Technical Specifications

Measurement Accuracy Performance

The ZXDN-3 calibrator maintains high accuracy across all measurement items:

Power and energy measurement: ±0.1% (built-in transformer), ±0.2% (split transformer)

AC voltage RMS accuracy: ±0.1%

AC current RMS accuracy: ±0.1% (±0.2% for split transformer)

Active power accuracy: ±0.1% (±0.2% for split transformer)

Reactive power accuracy: ±0.3% (±1.0% for split transformer)

Frequency measurement: 45Hz–65Hz range, ±0.01Hz resolution

Phase angle measurement: 0°–360° range, ±0.1° accuracy

For energy meter pulse calibration, the device provides standard impulse constants: low frequency FL=6400P/kW·h and high frequency FH=6400×8P/kW·h, adapting to the calibration requirements of energy meters with different pulse output specifications.

Rated Electrical Parameters

Rated voltage input: 0V–400V; 20% overload is prohibited

Rated current input: 0–10A (built-in transformer); 20A, 100A, 500A, 1000A, 2000A (optional split transformers); 20% overload is prohibited

Insulation and Power Supply

In terms of electrical safety, the insulating resistance between voltage/current input terminals and the instrument case is ≥100MΩ. The working power input terminal can withstand 1.5kV (RMS) voltage to the case for 1 minute, which meets the safety requirements of high-voltage site operations.

The device is powered by DC 8.4V ±10% with a power consumption of 8VA, supporting long-duration on-site work without mains power supply.

Environmental and Mechanical Specifications

Operating temperature range: -15°C to 60°C

Relative humidity range: 0%–90%

Warm-up time: 1 minute

Dimensions: 32×24×13cm

Weight: 2.0kg

The wide environmental adaptation range ensures stable operation of the instrument in various harsh field conditions such as high temperature, high humidity and cold environments. The 1-minute short warm-up time effectively shortens the pre-test preparation cycle and improves on-site work efficiency.

Application Value for Power Technicians

For power metering technicians, on-site operation and maintenance engineers, and equipment commissioning personnel, the ZXDN-3 Multi-functional Energy Meter Calibrator integrates multiple test functions into one portable device, reducing the number of instruments carried for field work. Its high-precision measurement performance, flexible access methods, intuitive phase analysis and convenient data management capabilities can effectively improve the work efficiency of energy meter verification, CT ratio testing, three-phase wiring inspection and electrical parameter detection. It is a practical and reliable technical tool for daily metering management, equipment acceptance and fault troubleshooting in power systems.

GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/