Jinneng Electric Power Technology (Hubei) Co., Ltd.'s two types of 440V / 525V cylindrical power capacitors have fully passed all routine tests and type tests to high standards in strict accordance with international standard IEC 60831-1 & 60831-2.
All tests were carried out entirely by Suzhou Electrical Apparatus Science Research Institute Co., Ltd. Official authoritative certificates and full test reports are issued by TÜV Rheinland.
IEC60831-1 Routine Tests: Capacitance & output calculation, tangent loss angle (tanδ) measurement, voltage test between terminals, voltage test between terminals and container, internal discharge device test, sealing test, etc.
IEC60831-2 Type Tests: Thermal stability test, tanδ measurement at elevated temperature, lightning impulse voltage test, discharge test, ageing test, self-healing test, destruction test, etc.
✅ Passed Extreme 1500h Long-term Ageing Test in One Time: Completed the full severe ageing sequence: 1.25× rated voltage for 750h + 1000 charge-discharge cycles + another 750h at 1.25× rated voltage, total 1500 hours continuous operation with zero abnormality.
✅ Excellent Low Temperature Rise & Ultra-low Loss: Measured dissipation factor (tanδ) ≤ 0.0012, with extremely low temperature rise under long-term operation. Tangent loss (tanδ) is far below IEC standard limit, delivering outstanding energy efficiency and long-term reliability.
✅ Insulation & Impact Resistance Beyond IEC: As Indoor capacitor withstands 6/15kV insulation level. Both power frequency withstand voltage and lightning impulse voltage test results exceed IEC standard requirements, with excellent overvoltage and lightning surge protection.
✅ All Models Fully Qualified: All products passed 100% of type and routine tests. With stable consistent quality, they are ideal for long-term reliable operation in global photovoltaic projects, industrial power distribution and power grid systems.
⚠️Declaration: The capacitors submitted for inspection by our company have passed the IEC certification at the highest standards. However, unless the customer explicitly puts forward specific requirements, we do not undertakethat all capacitors will be produced and delivered in accordance with or higher than IEC standards.
Business Partner
Business Partner:
State Grid, China Southern Power Grid, China Energy Engineering Group,
China Nuclear Photovoltaic, China Railway Group, Hong Kong Metro,
China National Petroleum Corporation, China Petroleum &Chemical Corporation,
China Railway, Tianneng Battery, Siemens, Tgood, CATL(Contemporary Amperex Technology Co. Limited) etc.
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