News & Events - Xianheng International (Hangzhou) Electrical Manufacturing Co., Ltd.

09

2026-10

How to Select an AC Resonant Test System Based on Test Voltage and Capacitance

Selecting an AC resonant test system requires more than matching the equipment's rated voltage to the withstand voltage of the test object. Engineers must also evaluate load capacitance, charging ...

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02

2026-10

Common AC Resonant Testing Problems and Troubleshooting Methods

AC resonant testing is widely used to evaluate the insulation withstand capability of high-voltage electrical equipment, including XLPE power cables, gas-insulated switchgear (GIS), transformers, moto...

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10

2026-09

Middle East Energy 2026 | September,2026

Exhibition OverviewELECGENE took part in Middle East Energy 2026, held from September 1 to 3 at Dubai World Trade Centre in Dubai, UAE.The 50th edition of the exhibition brought together manufacturers...

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03

2026-09

How to Test Protection Relay Pickup and Operating Time?

Testing protection relay pickup and operating time means verifying whether a relay starts and trips at the correct electrical threshold and within the expected time delay. This test is essential for s...

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03

2026-09

What Causes High Contact Resistance in Circuit Breakers and Busbar Joints?

High contact resistance in circuit breakers and busbar joints is usually caused by poor metal-to-metal contact, surface contamination, oxidation, loose mechanical pressure, contact wear, misalignment ...

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03

2026-09

SFRA vs Other Transformer Diagnostic Tests: What Does It Tell You?

SFRA, or Sweep Frequency Response Analysis, is a transformer diagnostic method used to detect mechanical and electrical changes in the active part of a transformer by comparing frequency response curv...

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03

2026-09

What Do Different Frequency Ranges Mean in SFRA Testing?

Different frequency ranges in SFRA testing indicate which transformer parts are most likely influencing the response curve, such as the core, main windings, tap windings, leads and connections. SFRA i...

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20

2026-08

Meet Elecgene at Middle East Energy 2026 in Dubai

Exhibition IntroductionMiddle East Energy (MEE) 2026 will be held from September 1 to 3, 2026, at Dubai World Trade Centre, Dubai, UAE.MEE is an international event for the power and energy industry, ...

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20

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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