Switching Circuit Comprehensive HV Circuit Breaker Tester

Product Introduction

During handover and preventive testing of electrical equipment, low-voltage circuit breaker tests typically include mechanical characteristic testing and loop resistance testing. To complete these tasks, two sets of equipment are usually required. Even for the few devices that support both functions, they often only perform single-phase loop resistance testing at a time, involving cumbersome wiring and operation that hinders efficiency.

Our design team, drawing on years of field experience, fully understands these practical challenges. Through hardware design and software optimization, we have developed a targeted solution. While retaining the capability for single-function testing, we innovatively introduced an intelligent testing mode. This mode not only meets on-site testing requirements but also significantly simplifies wiring and operation. Enhanced with real-time voice prompts and wireless control via smart devices, it makes the testing process more streamlined, convenient, and efficient.

Product Parameter (specification)

◆Usage Environment

Input power supply: 220V±10%, 50Hz±10%

Atmospheric pressure: 86～106kPa

Temperature: -10 to 40℃

Humidity: ≤80%RH

◆Safety Performance

Insulation resistance: >2MΩ

Dielectric strength: The power supply withstands 1.5kV power frequency for 1 minute against the chassis without flashover or arcing.

◆Basic parameters:

Test Parameters for Circuit Breaker Mechanical Characteristics (Table 1)

		Range	Resolution	Error
time		0-4000ms	0.1ms	±1%±1 character
journey	Vacuum circuit breaker	50mm	0.1mm	±1%±1 character
	SF6 circuit _breaker	300mm
	Low oil circuit breaker	1000mm
Output	Voltage	DC5-270V Digital Adjustable	1V	±1%±1 character
	Current	20A (instantaneous)	0.01A	±1%±1 character
speed		20.000m/s	0.001m/s	±1%±1 character
Time measurement channel		12-way metal break
Data Graphics		Time -break, Time-displacement, Time-current

Loop Resistance Test Parameter Table (Table 2)

range	resolution	error	power	working methods
0-50mΩ	0.1μΩ	±0.5%±2 characters	1000W	Continuous measurement

DC Resistance Test Parameter Table (Table 3)

range	resolution	error	Test current
5mΩ-20kΩ	0.1μΩ	±0.2% ± 2 characters	≤3A

Product feature and application

◆Compatible with mainstream domestic and international high-voltage circuit breaker models, equipped with linear travel sensors and incremental rotary sensors. The incremental rotary sensor enables direction-independent installation, featuring a dedicated plum-blossom connector for simplified and stable mounting.

◆Features a dedicated 10kV circuit breaker aviation connector for rapid, secure, and reliable connection of closing/opening and energizing coil wiring, eliminating wiring-related safety hazards.

◆Features a 7-inch resistive color touchscreen with full English menu display and voice prompts. Supports wireless connection and control via smart devices. Generates Word test reports in specific formats for convenient data storage and printing.

◆Test functions include circuit breaker mechanical characteristic testing, closing/opening coil resistance testing, loop resistance testing, low-voltage operating voltage testing, and energy storage motor charging. Tests can be freely selected, with intelligent sequencing to eliminate redundant or invalid measurements.

◆ Supports storage of up to 999 test data sets. Test parameters remain intact after power loss. Mechanical characteristic tests generate time-displacement diagrams and dynamic current schematic diagrams, with speed data available for post-test analysis. USB storage interface facilitates data preservation.

◆ USB communication interface enables secondary programming contr

Prodection details

1. **Power Equipment Handover Testing**: Prior to commissioning newly installed 10kV high-voltage circuit breakers, inspect mechanical characteristics, contact resistance, and other parameters to ensure compliance with standards such as GB50150-2016, guaranteeing initial equipment performance meets specifications.

2. **Preventive Testing**: During routine maintenance of circuit breakers at substations, power plants, and similar facilities, tests are conducted on low-voltage operation, coil resistance, and other parameters. This proactively identifies potential hazards such as aging or poor contact to prevent failures.

3. **Post-Repair Acceptance**: After circuit breaker repairs, comprehensive testing-including intelligent sequential testing-verifies the effectiveness of maintenance. Only upon confirming the equipment's restored operational capability may it be recommissioned.

4. **Equipment Manufacturing Inspection**: During factory acceptance testing of 10kV high-voltage circuit breakers by power equipment manufacturers, parameters such as mechanical characteristics and resistance are calibrated to ensure products comply with industry standards (e.g., DL/T 846.3-2017).

Company Qualifications

FAQ

1)What type of power equipment is the MEGK-WZH Switching Circuit Comprehensive Tester primarily designed for?

Answer: It is primarily designed for high-voltage circuit breakers, including 10kV-rated high-voltage circuit breakers, while also being compatible with various types of switching equipment such as SF6 switches, GIS integrated switchgear, vacuum switches, and oil circuit breakers.

2)What user-friendly designs does the MEGK-ZH Switching Circuit Comprehensive Tester feature in terms of operation and wiring?

Answer: It features dedicated plum-blossom connectors and specialized aviation connectors for 10kV high-voltage circuit breakers. Sensors can be installed in any orientation for quick and secure wiring. It supports wireless control via smart devices, paired with a 7-inch color touchscreen and fully Chinese-language menus for intuitive operation. Internal intelligent switching enables multifunctional reuse of the same wiring configuration, reducing repetitive wiring tasks.

3)How can test data from the MEGK-ZH Switching Circuit Comprehensive Tester be processed and stored?

Answer: The instrument supports storage of up to 999 sets of test data with non-volatile memory. It generates Word test reports in specific formats and includes a USB storage interface and USB communication port for convenient data saving, printing, and uploading to computers for further analysis.

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