120000kVA Three Phase Oil Power Transformer 230kv 161kv 33kv Distribution Transformers on Load Tap Changer

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

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:

Cases reference:

Production line:

Referenc transformer runing on the buyer’s site :

PACKING AND SHIPPING :

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