How should you apply ASTM D149 dielectric strength and the 80% rule for safe transformer testing?
ASTM D149 defines how to measure dielectric strength of solid insulation by applying an increasing...
Technical Guide
How can series resonant test systems safely test massive capacitive loads?
A series resonant test system lets you test long HV cables and GIS with a...
Is your transformer testing strategy ready for the 128‑week lead-time crisis?
Power transformer lead times in the U.S. have stretched to around 128 weeks, with GSU...
How does testing protective rubber goods ensure technician safety?
Testing protective rubber goods such as gloves, blankets, and hot sticks verifies that the insulation...
How can you safely discharge capacitive loads after high-voltage tests?
Safely discharging capacitive loads after high-voltage testing means converting stored energy into heat in a...
Is your transformer ratio testing ready for the 2026 IEC/IEEE accuracy mandates?
The 2026 IEC 60076-1 and IEEE C57.12.90 revisions enforce a ±0.5% maximum deviation on transformer...
Is AC or DC withstand testing better for cable dielectric stress?
AC withstand testing stresses the entire insulation system in a way that closely replicates real...
What does creeping leakage current really mean?
Creeping leakage current usually means your insulation system is aging, contaminated, or stressed beyond design,...
Is 0.1 Hz VLF testing the safest way to test XLPE power cables?
0.1 Hz VLF testing is widely regarded as the safest, most practical way to test...
Is condition-based maintenance the key to NERC’s 2026 reliability challenges?
The 2026 NERC Long-Term Reliability Assessment confirms that U.S. peak demand is rising faster than...