120000kVA Three Phase Oil Power Transformer Distribution Transformers on Load Tap Changer
Power Transformer 230-242kV on-load-tap-changing power transformer is made of high-quality silicon-steel sheets, and laminated by steps. It 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.
Model NO.: SFZ 120000/230/35KV
Cooling Method: Oil-immersed Type Transformer
Winding Type: Two-winding Transformer
BASIC INFO.
| Model NO. | SFZ 120000/230/35KV | Test Certification | Kema Transformer Test |
| Cooling Method | Oil-immersed Type Transformer | Transport Package | Wooden Cases |
| Winding Type | Two-winding Transformer | Specification | IEC Standard |
| Certification | ISO9001-2000 | Trademark | Ville |
| Usage | Power Transformer | Origin | Ningbo |
| Frequency Characteristics | Power Frequency | HS Code | 8504231200 |
| Shape of Core | Ring | Production Capacity | 1/6monthes |
| Brand | Ville |
Insulation Level
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
TECHNICAL PARAMETERS
| Type | SFZ-120000/230 | Rated frequency | 50 Hz |
| Rated voltage | 230/34 kV | Connection | Ynyn0(d11) |
| Rated capacity | 100000/120000kVA | Voltage regulating method | Neutral point on-load Regulating |
| Rated voltage ratio | 230± 8× 1.25%/34kV | Short circuit impedance | 9.5%(10MVA) |
| Rated current | 301/2038A | Cooling mode | ONAN/ONAF |
| Phase number | Three |
| 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 | |
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 |
