Category Test Instruments

A current clamp meter measures live current without breaking the circuit; this selection guide covers types, key specifications, true RMS and safe test setup.

Hi pot testing stresses insulation out of service with an overvoltage and watches the leakage; this guide covers voltage selection, AC/DC/VLF choice and setup.

How to test a circuit breaker step by step: prove dead, measure contacts and insulation, and prove the protection operates the breaker.

How to choose a ground resistance tester by method, probe spacing and interference, and how to read soil resistivity and touch voltage limits.

How to choose a power quality analyzer by class, channels and recording setup, and how to read harmonics, unbalance and events on a real supply.

How to choose a megohmmeter by test voltage and range, read the number after temperature correction, and set up insulation tests for motors and chillers.

How a voltage transformer behaves under real burden, how IEC and IEEE accuracy notations differ, and the field tests that catch a defective unit before service.

Author: Baoding Houfeng Trading Co., Ltd. — Power Monitoring and Testing Equipment Team,supplying relay test sets and high voltage test instruments to utilities and EPC contractors since 2026Technical review: reviewed by the in-house power testing engineering team against IEC 60255-1:2022 and GB/T…

Author: Leon Zhang — Power Monitoring and Testing Equipment Team, Baoding Houfeng Trading Co., Ltd., sourcing CT and VT test equipment for utilities, relay engineers and calibration laboratoriesTechnical review: reviewed by the in-house high voltage test engineering team against IEC 61869-2:2012, IEC…

Author: Leon Zhang — Power Monitoring and Testing Equipment Team, Baoding Houfeng Trading Co., Ltd., specifying permanent and portable power quality monitoring for utilities, industrial plants and energy managersTechnical review: reviewed by the in-house power monitoring team against IEC 61000-4-30:2025, IEC 62586-2:2017…