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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
What are the environmental requirements for installing this voltage transformer?
The transformer is designed for outdoor use. The installation site altitude should be less than 1000m above sea level, and the environmental temperature must remain within the range of -40℃ to +40℃.
What standards does this voltage transformer comply with?
The product performance conforms to the IEC standard and the GB1207-2006 standard for "Voltage transformer".
What is the basic structural design of this transformer?
It is a single-phase three-winding type voltage transformer featuring a column iron core and a square oil tank. It utilizes a paper-oil insulation structure with an oil conservator equipped with a rubber diaphragm to isolate the oil from air.
What are the rated primary and secondary voltage levels?
The rated primary voltage is 35000/√3V, the rated secondary voltage is 115/√3V, and the residual voltage winding rated voltage is 100/3V.
What is the continuous operating limit of this voltage transformer?
This type of voltage transformer can operate continuously under 1.2 times the rated primary voltage.
How is the power frequency withstand voltage test conducted on the primary winding?
Due to graded insulation, the 95kV 60s primary winding power frequency withstand voltage test is replaced by a frequency doubling test. This involves grounding the N terminal and applying voltage from the secondary winding to ground the A terminal.