Home > Products > 110–150 kV oil-immersed power transformers > TRDN-25000–63000/110-U1 (UHL1) type two-winding power transformers with split LV winding and on-load tap changer (OLTC)

TRDN-25000–63000/110-U1 (UHL1) type two-winding power transformers with split LV winding and on-load tap changer (OLTC)

Power transformer, three-phase, two-winding, with split LV winding, natural oil circulation and forced air cooling, equipped with on-load tap changer (OLTC). Automatic control is provided by a controller supplied together with the transformer. TRDN-type transformers ensure reliable power supply throughout their service life.

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Description

Power range

Rated power range: 25000÷63000 kVA
HV winding rated voltage: 115 kV
LV winding rated voltage: 6.6–6.6 (11–11) kV
Climatic category: U 1 / UHL1

Transformer symbols

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

Characteristic

Main Technical Characteristics TRDN-25000–63,000/110-U1 (UHL1) type transformers
Parameter	Value
Transformer type	TRDN-25000/110	TRDN-40000/110	TRDN-63000/110
Rated power, kVA	25000	40000	63000
HV winding rated voltage , kV	115	115	115
LV winding rated voltage , kV	6,3-6,3; 10,5-10,5	6,3-6,3; 10,5-10,5	6,3-6,3; 10,5-10,5
Winding connection diagram and vector group	Yn/D-D-11-11	Yn/D-D-11-11	Yn/D-D-11-11
No-load losses, kW	25	34	50
Short-circuit losses, kW	120	170	245
Short-circuit voltage HV–LV, %	10,5	10,5	10,5
Short-circuit voltage HV–LV1 (LV2), %	20	20	20
Short-circuit voltage LV1–LV2, not less than, %	30	30	30
No-load current, %	0,4	0,55	0,2

Overall and Mounting Dimensions

Overall dimensions of TRDN-25000–63000/110-U1 (UHL1) type transformers
Transformer type	Dimensions, mm			Weight, kg
Transformer type	L	B	H	Oil weight	Shipping weight	Total weight
TRDN-25000/110	5900	4080	5400	15000	43705	50130
TRDN-40000/110	5980	4655	5215	12200	48220	57900
TRDN-63000/110	6080	4500	5520	18625	70040	79725