Blog - Xianheng International (Hangzhou) Electrical Manufacturing Co., Ltd.

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2026-08

How to Choose an Acoustic Imaging Camera

Choosing an acoustic imaging camera requires more than comparing microphone count or maximum detection distance. The right camera must match the sound source, working distance, background noise, inspe...

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20

2026-08

How to Interpret Leakage Current During a Hipot Test

Leakage current during a hipot test should be interpreted by examining how the current changes with voltage and time—not by judging one isolated reading. A relatively high but stable current may be n...

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20

2026-08

AC Hipot Testing vs DC Hipot Testing: How to Select the Right Method

AC and DC hipot testing are both dielectric withstand methods, but they apply different electrical stresses and require different test equipment. AC hipot testing applies alternating voltage and is co...

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20

2026-08

Acoustic Imaging Camera vs Thermal Camera: What's the Difference?

Compare acoustic imaging cameras and thermal cameras by signal, applications, limitations and selection criteria for electrical and industrial inspections.

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03

2026-08

Guide to Micro-Ohmmeters: Working Principle, Applications, and Selection

A micro-ohmmeter is a precision low-resistance tester used to measure very small resistance values in electrical contacts, busbars, circuit breakers, disconnectors, grounding joints, welds, cables and...

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03

2026-08

Sweep Frequency Response Analysis: Transformer Testing and Interpretation Guide

Sweep frequency response analysis is a transformer diagnostic method used to detect mechanical changes in windings, core structures and internal connections by measuring how a transformer responds to ...

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03

2026-08

Secondary Injection Test Kit: Working Principle, Applications, and Selection Guide

A secondary injection test kit is a relay testing instrument that injects controlled current and voltage signals directly into protection relay input terminals to verify relay settings, logic, timing ...

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03

2026-07

Hipot Cable Testing: A Practical Guide for Power Cable Safety and Reliability

Hipot cable testing, also called high potential cable testing or dielectric withstand testing, is a high-voltage test used to verify whether cable insulation can withstand electrical stress without br...

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03

2026-07

Circuit Breaker Inspection: A Practical Guide for Safe and Reliable Power Systems

Circuit breaker inspection is the process of checking, testing and documenting a circuit breaker’s mechanical, electrical and insulation condition to ensure it can open, close and interrupt faults sa...

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03

2026-07

Transformer Partial Discharge: Causes, Testing Methods and Diagnosis Guide

Transformer partial discharge is a localized electrical discharge that occurs within part of an insulation system without completely bridging the insulation between conductors. In power transformers, ...

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