Product introduction:
Power Transformer 230-242kV on-load-tap-changing power transformer is made of high-quality silicon-steel sheets, and laminated by steps.
t is advantageous in low loss, low noise, low voltage partial discharge and high anti short-circuit capacity. The dynamical and thermal stability
of this transformer, of which the coils are winded by high-quality oxygen-free copper wire as well as used pre-compressing brackets
processes and interior and exterior structure. The transformer tank used wave form shell, has very nice appearance, the core is with D shape
yoke and 45 angle seaming. The core and oil box are well fixed and well protected on moving.
Three-phase dual winding oil immersed power transformer with OLTC
Technical parameters:
Type: SFZ-120000/230
Rated voltage: 230/34 kV
Rated capacity: 100000/120000kVA
Rated voltage ratio: 230± 8× 1.25%/34kV
Rated current: 301/2038A
Phase number: Three
Rated frequency: 50 Hz
Connection: Ynyn0(d11)
Voltage regulating method: Neutral point on-load Regulating
Short circuit impedance: 9.5%(10MVA)
Cooling mode: ONAN/ONAF
| Description: |
Lightning impulse withstand voltage(kV peak value) |
1minMain frequency withstand voltage
(kV RMS) |
| Full wave |
Chopped wave |
| High voltage side |
1050 |
1175 |
460 |
| Neutral point of high voltage |
(1050) |
|
( 460 ) |
| Low voltage side |
170 |
185 |
70 |
| Neutral point of low voltage |
170 |
|
70 |
Insulation Level: A
Field strength between transformer winding turns is no more than 2kV/mm
Transformer loss (under 75) no-load current and efficiency
No-load Loss: 92 kW According to IEC standard
Load Loss: 356 kW According to IEC standard
No-load current: 0.3 % According to IEC standard
Radio interference and corona
Under the Maximum phrase voltage, corona is not visible from outgoing terminal in the night of clear day at outdoor. Radio interference
voltage is no more than 2500Uv
Overloading capability
Short-time overloading capability of transformer and overload running time are as follow:
| Over current |
30 |
45 |
60 |
75 |
100 |
| Allowable running time min |
120 |
80 |
45 |
20 |
10 |
Cases reference:
Production line:
Referenc transformer runing on the buyer's site :
PACKING AND SHIPPING :
Our Best Service For You
| 1. |
Pre sale service |
| a. |
make technical solution |
| b. |
send quotation, technical data sheet and drawing |
| c. |
prepare power transmission plan, testing plan and shipment plan |
| 2. |
In sale service |
| a. |
supervise the manufacturing schedule totally in accordance with the plan |
| b. |
send photos to customer during every manufacturing process(hold point) |
| c. |
inform the customer one week before testing. |
| 3. |
After sale service |
| a. |
installation and commissioning, training the workers |
| b. |
quick response within 12 hours any time |
| c. |
provide 12 months guarantee period normally. |
FAQ For You
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