Home > Products > 110–150 kV oil-immersed power transformers > TDTN-10000–63000/110-U1 (UHL1) type three-winding power transformers with on-load tap changer (OLTC)

TDTN-10000–63000/110-U1 (UHL1) type three-winding power transformers with on-load tap changer (OLTC)

Power transformer, three-phase, three-winding, with natural oil circulation and forced air cooling, equipped with on-load tap changer (OLTC). OLTC regulation range (HV side): ±9 × 1.78%. Off-circuit tap changer (DETC) provided. Automatic control is provided by a controller supplied together with the transformer. TDTN-type transformers ensure reliable power supply throughout their service life.

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Description

Power range

Rated power range: 10000–63000 kVA
Climatic category: U1 / UHL1

Transformer symbols

Т – Three-phase transformer
D – Natural oil circulation and forced air cooling
Т – Three-winding
N – On-load voltage regulation (OLTC)
Х – Rated power, kVA
110 – HV voltage class, kV
U1 or UHL1 – Climatic design and installation category in accordance with GOST 15150

Characteristic

Technical characteristics DTN-10000–63000/110-U1 (UHL1) type transformers
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 diagramand 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