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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 installation altitude and environmental limits for this voltage transformer?
The transformer is designed for outdoor installation at altitudes of less than 1000m above sea level, and it operates within an environment temperature range of -40℃ to +40℃.
What standards does this voltage transformer comply with?
The product performance conforms to the international IEC standard and the GB1207-2006 standard for "Voltage transformers".
What is the core structure and insulation type of the transformer?
It is a single-phase three-winding type transformer with a column iron core fixed in a square oil tank. It features a paper-oil insulation structure, with an oil-resistant rubber diaphragm in the oil conservator to isolate the transformer oil from air.
How is the primary winding power frequency withstand voltage test conducted?
Due to the graded insulation of the product, the standard 95kV 60s power frequency withstand voltage test is replaced by a frequency doubling test. This is performed 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 voltage transformer operate continuously under overvoltage conditions?
Yes, this type of transformer is designed to continuously operate under up to 1.2 times the rated primary voltage.