Home > Products > Oil-immersed power transformers, voltage class 110–150 kV > Three-winding power transformers with OLTC, type TDTN-10000÷63000/110-U1 (UHL1)

Three-winding power transformers with OLTC, type TDTN-10000÷63000/110-U1 (UHL1)

Three-phase, three-winding power transformer with natural oil circulation and forced air cooling, with on-load voltage regulation (OLTC), HV side regulation range ±9×1.78%, and tap-changing without excitation (NLTC). Automatic control is performed by an automatic controller supplied together with the transformer. The use of TDTN-type transformer ensures reliable power supply to the consumer throughout the entire service life.

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Description

Power range

Power range: 10000÷63000 kVA.
Climatic design: U1 or UHL1.

Transformer symbols

Т – Three-phase transformer
D – With natural oil circulation and forced air cooling
Т – Three-winding
N – With on-load voltage regulation (OLTC)
Х – Rated power, kVA
110 – HV voltage class, kV
U1 or UHL1 – Climatic design and installation category according to ГОСТ15150

Characteristic

Technical specifications of transformers type TDTN-10000-63000/U1(UHL1)
Parameter	Value
Transformer type	TDTN
Rated power, kVA	10000	16000	25000	40000	63000
Rated voltage, HV winding, kV	115
Rated voltage, MV winding, kV	38,5 (35)
Rated voltage, LV winding, kV	6,6; 11,0
Winding connection scheme and vector group	Yn/Yn/D-0-11, Yn/D/D-11-11
No-load losses, kW	17	21	28,5	39	53
Short-circuit losses, kW	76	100	140	200	290
Short-circuit voltage, HV-MV, %	10,5	10,5	10,5	10,5	10,5
Short-circuit voltage, HV-LV, %	17,5	17,5	17,5	17,5	18
Short-circuit voltage, MV-LV, %	6,5	6,5	6,5	6,5	7
No-load current, %	0,6	0,5	0,4	0,3	0,2
Dimensions, mm
L (length)	5255	6250	6280	6000	6475
B (width)	3360	3940	4120	4440	4200
H (height)	4994	5191	5625	5330	5900
Oil weight, kg	13420	13800	17050	16450	20410
Transport weight, kg	34489	40985	54100	60780	81965
Total weight, kg	39559	46800	61930	70180	95120