Transformer winding resistance test: A Practical Guide for Load Testing
Reading the direct resistance, no-load current and the rated value, transformer winding resistance test verifies winding and magnetic circuit.
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Phone/WhatsApp/Wechat: +86 13655813266
Leon Zhang
Leon Zhang is a transformer condition monitoring engineer at Houfeng (HF), writing the technical guides on this site: dissolved gas analysis (DGA), online transformer monitoring, anti-theft protection and partial discharge (PD) detection. The guides reference the applicable standards, including IEEE C57.104-2019 for DGA, IEC 60599 for dissolved gas interpretation and IEEE C57.113 for PD measurement.
Switchgear monitoring: A Practical Guide for Substation and Plant Engineers
Switchgear monitoring tracks temperature, partial discharge and sf6 density channels of a bay, catching a developing failure before it opens.
Ground fault locator: Selection Guide, Key Specifications and Test Setup
Locate the distance to a buried cable fault fast: a ground fault locator combines TDR, thumper and receiver to pinpoint the site before excavation.
Transformer calculator: A Practical Guide for Substation and Plant Engineers
How a transformer calculator turns connected load into a kVA rating, full-load current, conductor size and protection setting — and how to check the answer.
Underground Cable Fault Locator Types and Features: Selection Guide, Key Specifications and Test Setup
A field guide to underground cable fault locator types and features: LV pulse, pulse current and multiple pulse modes, accuracy, blind zone and field setup.
Digital multimeter for electricians: Selection Guide, Key Specifications and Test Setup
How to specify a digital multimeter for electricians: the four jobs, CAT III and CAT IV ratings, 7-function labels, accuracy formulas and test setup.
Multimeter with true rms: Selection Guide, Key Specifications and Test Setup
How to specify a multimeter with true rms: what the claim promises, AC bandwidth and crest-factor limits, clamp sensors and how to prove the reading on site.
Current transformer simulation: A Practical Guide for Substation and Plant Engineers
Current transformer simulation predicts ratio error, phase error and saturation so protection and metering accuracy can be verified before energisation.
Sf6 gas: A Practical Guide for Substation and Plant Engineers
Insulating and arc-quenching in one volume, sf6 gas is also a regulated greenhouse gas; match the detector, analyzer and density gauge to the question asked.
Furnace transformer: A Practical Guide for Substation and Plant Engineers
A furnace transformer turns grid voltage into the low voltage and high current an arc furnace needs; buy the duty, not the nameplate, and test it right.