Table of Contents

Overview

High and Low Voltage Switchgear Tester is an all-in-one testing device developed for power distribution equipment inspection. It integrates multiple testing functions to evaluate the overall performance of switch cabinets, including loop resistance, insulation performance and circuit breaker operating characteristics. Suitable for factory acceptance, on-site commissioning and daily maintenance of high and low voltage switchgear in power grids, industrial plants and new energy projects, it greatly improves testing efficiency and ensures safe operation of distribution systems.

Technical Parameters

Item	Specification
Input Power Supply	3-phase 4-wire AC 380V
3-phase AC Adjustable Output	1 set, 0–10A (100V, adjustable)
3-phase AC Fixed Output	1 set, 100V
AC Operating Voltage Output	AC 0~45V, current < 10A at 220V
DC Operating Voltage Output	DC 0~260V
DC Fixed Voltage Output	1 set, 24V / 36V / 110V / 220V
3-phase Power Factor Adjustable Range	cosφ: -0.3 ~ 1 ~ 0.1 (3 phases independently adjustable), current signal amplitude: 1A
Single-phase AC 220V Fixed Output	2 sets, socket type
3-phase AC 380V Fixed Output	1 set, terminal post type
Overall Dimensions	750 × 570 × 960 mm
Weight	45 kg

Operating Steps

Check the equipment and test cables for damage, and confirm all connections are intact.
Connect the input power cable to the 3-phase 4-wire AC 380V power supply.
Wire the tested high/low voltage switchgear correctly according to test requirements.
Switch on the tester, select the corresponding test function and set relevant parameters.
Start the test, observe real-time data and record test results.
After testing, stop the output first, then power off the instrument.
Disconnect the test wiring and input power in sequence, sort out all cables.

FAQ for High and Low Voltage Switchgear Tester

Q1: What power supply does the tester need?

A: The input power is 3-phase 4-wire AC 380V. Please confirm the power supply specification before operation to avoid abnormal work.

Q2: What kinds of output voltages are available?

A: It supports multiple outputs, including adjustable/fixed three-phase AC voltage, AC operating voltage, adjustable DC operating voltage, fixed DC voltage (24V,36V,110V,220V), single-phase AC220V and three-phase AC380V output.

Q3: What is the adjustable range of three-phase power factor?

A: The power factor cosφ ranges from -0.3 to 1 to 0.1, three phases can be adjusted independently, and the current signal amplitude is 1A.

Q4: Can this equipment test high and low voltage switchgear comprehensively?

A: Yes. It supplies various control power and analog signal sources to complete protection relay verification, closing & tripping tests for switchgear.

Q5: What is the weight and dimension of the main unit?

A: Overall size: 750×570×960 mm; weight: 45 kg.

Q6: What should I pay attention to before starting the test?

A: Check all cables for damage. Make correct wiring according to test requirements. Do not connect load before setting parameters.

Q7: What is the maximum current for AC operating voltage output?

A: For AC 0~450V operating output, the current is less than 10A when the voltage is set to 220V.

Q8: How to shut down the instrument correctly after testing?

A: First cut off all signal and power outputs, then turn off the main power switch, and finally remove all connecting wires.

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HF-WC-632 High and Low Voltage Switchgear Tester