Wuhan Musen Electric Co., Ltd.

10/06/2026

High Power Series Resonance Test Set with 4 Reactors – All-in-one Solution for Long HV Cable & GIS AC Hipot Test

🔥Live demo of series resonance test system with 4 reactors & multiple excitation transformers!
✅Flexible series & parallel connection, covers 10kV to 220kV full voltage range
✅Specialized for long HV XLPE cables, GIS, power transformers & generators AC withstand test
✅Low input power generates ultra-high test voltage, lightweight & easy transport for field work
✅Auto resonance frequency tracking, multi-layer safety protection, compliant with international HV testing standards
Widely used by power grid companies, EPC contractors, testing labs & substation maintenance teams. Custom kVA models available, contact us for quotation!


# link: https://musenelec.com/product/resonance-test-system/

09/06/2026

⚠️ PT/CT Excitation Curve: Acceptance Standards & Mandatory Tests | Must-Know for Power Engineers
💡 Important: PT/CT excitation test is a mandatory special test for grid safety & protection reliability.
✅ Acceptance Criteria:
Curve shape: linear at low voltage, clear knee point, steep saturation
Tolerance: knee voltage ≤10% deviation, excitation current ≤20% deviation
Standards: CT (GB/T20840.2/DL/T1332), PT (GB/T1207/DL/T596)
Common failures: premature saturation, unclear knee, 3-phase inconsistency → reject; check core & windings.

link：https://musenelec.com/product/ct-pt-analyzer/

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02/06/2026

⚡️ Transformer DC Resistance Testing: Are you wasting time with single-channel or overpaying for three-channel testers?

Post Body:
Winding resistance measurement is a critical routine test for transformers. However, choosing between a Single-Channel and a Three-Channel tester can be tricky for many field technicians.

💡 Quick Selection Guide:

Single-Channel: Reliable and cost-effective. Best for small distribution transformers or single-phase units.

Three-Channel: Measures all three phases simultaneously. A game-changer for large power transformers (especially Yn-connected), reducing test time by up to 70%!

Which one fits your daily budget and workflow better? Watch our latest video to make the right choice! 👇
[Insert Video Link]https://musenelec.com/product/transformer-dc-winding-resistance-tester/

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22/05/2026

Wondering about the difference between UST and GST in Tan Delta testing? ⚡

When measuring the dielectric loss tangent (tan δ) of high-voltage assets, choosing the right connection mode determines the accuracy of your insulation data:
🔹 UST (Ungrounded Specimen Test / Positive): Measures ungrounded components (like inter-winding insulation) by eliminating stray ground capacitance.
🔹 GST (Grounded Specimen Test / Negative): Measures permanently grounded objects (like winding to tank), utilizing the ground return path.

Check out our latest video to understand the technical difference and optimize your field testing workflows! 👇https://musenelec.com/product/tan-delta-tester/

20/05/2026

How Do You Determine If GIS Gas Density Is Normal?

Sulfur hexafluoride (SF6) pressure varies significantly with temperature; therefore, the true gas density can only be determined after temperature compensation. So, how exactly do you make this assessment? : https://musenelec.com/product/sf6-gas-density-relay-calibrator/

15/05/2026

Transformer and Instrument Transformer Manufacturers—Attention!
Insufficient Factory Accuracy?
Failure to Pass Withstand Voltage Tests?
Excessive Partial Discharge Interference?

03/03/2026

Stop Messy Oil Changes Forever! ⚡️

28/02/2026

Why Do Insulators Have "Skirts"?