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China JDXF-35 Single Phase Oil Immersed Voltage Transformer - Reliable Suppliers & Factory for 35kV Power Systems
Type designation
Service condition
- Installation site altitude: Less than 1000m above sea level
- Environment temperature -40℃ ~ +40℃
- This product is for outdoor use.
Structure
This voltage transformer is single phase three-winding type, with column iron core, its body is fixed on the case cover in square oil tank. Winding outgoing line was lead through HV and LV insulator separately, HV insulator is equipped with oil conservator on the top, and primary terminal (A side) is on the oil conservator. Oil tank and insulator are filled with transformer oil, and it is paper oil insulation structure. There is oil resistant rubber diaphragm in the oil conservator to isolate the product and air. Oil conservator is equipped with oil level indicator. Oil drain valve is installed on the bottom of oil tank, and fixed installation hole on the oil tank baseboard.
Technical data
The product performance is conformed with IEC standard and GB1207-2006 “Voltage transformer”
- Rated primary voltage：35000/√3V;
- Rated secondary voltage：115/√3V;
- Residual voltage winding rated voltage：100/3V;
- Rated voltage factor and time：1.9, 8h;
- Ultimate output：1500VA
- Primary winding power frequency withstand voltage: 95kV 60s. Due to the product having graded insulation, the power frequency withstand voltage test can only be replaced by frequency doubling test voltage. The experiment involves grounding the N terminal and applying voltage from the secondary winding to ground the A terminal, inducing the rated test voltage value.
- Lightning impulse withstand voltage： Full wave 185kV clipped wave 220kV
- The power frequency test voltage between the N end and the secondary winding as well as ground is 5 kV for 60 seconds.
- The power frequency test voltage between the secondary winding and between the secondary winding and ground is 3 kV for 60 seconds.
- This type transformer can continuously operate under 1.2 times of primary voltage.
Outline dimension drawing
Frequently Asked Questions (FAQ)
What are the environmental requirements for installing this voltage transformer?
This voltage transformer is designed for outdoor installation. It operates efficiently at altitudes below 1000 meters above sea level and within an ambient temperature range of -40℃ to +40℃.
What standard does this product comply with?
The design and overall performance of the product comply with the IEC standard and the GB1207-2006 "Voltage transformer" standard.
How is the insulation system of this voltage transformer structured?
It features a paper-oil insulation structure. The oil tank and insulator are completely filled with transformer oil. Additionally, an oil-resistant rubber diaphragm is integrated into the oil conservator to isolate the oil from contact with air.
What are the rated primary and secondary voltages?
The rated primary voltage is 35000/√3V, the rated secondary voltage is 115/√3V, and the residual voltage winding rated voltage is 100/3V.
How is the power frequency withstand voltage test conducted for the primary winding?
Due to its graded insulation, the standard power frequency withstand voltage test is replaced by a frequency doubling test. This is done by grounding the N terminal and applying voltage from the secondary winding to ground the A terminal to induce the rated test voltage.
Can this transformer run continuously above the rated primary voltage?
Yes, this type of voltage transformer is designed to operate continuously under 1.2 times the rated primary voltage.