Home > Products > 10, 110, and 220 kV power transformers for railways > TDTNZh-16000–40000/220/27.5/11 type transformers for AC electrified railways

TDTNZh-16000–40000/220/27.5/11 type transformers for AC electrified railways

TDTNZh type power transformers, three-phase, three-winding, bell-type construction, with natural air and oil circulation, for railway applications. Rated power: 16000, 25000, 40000 kVA. Transformers rated 25000 kVA and above are supplied with bell-type tank design. Designed for power supply of AC electrified railways. Manufactured in accordance with GOST R 51559.

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Description

Power range

HV winding rated voltage – 220 kV
MV winding rated voltage – 27.5 (38.5) kV
LV winding rated voltage – 6.6; 11 (27.5) kV

Transformer symbols

Т – Three-phase transformer
D – Natural oil and forced air circulation
Т – Three-winding
N – On-load tap changer (OLTC)
Zh – Designed for AC electrified railway systems
Х – Rated power, kVA
220 – HV voltage class, kV
U1 or UHL1 – Climatic category and installation type in accordance with GOST 15150

Characteristic

Main technical characteristics
Parameter Name	Value
Rated power, kVA	16000	25000	40000
No-load losses, kW	29	39	54
Short-circuit losses, kW	115	160	220
No-load current, %	0.6	0.5	0.4
Short-circuit voltage HV-MV, %	12.5	12.5	12.5
Short-circuit voltage HV-LV, %	20	20	20
Short-circuit voltage MV-LV, %	7.5	7.5	7.5
Overall dimensions, mm
L - length	9000	9000	9000
B - width	5000	5150	5350
H - height	7350	7350	7350
Oil weight, kg	25000	30000	30000
Shipping weight, kg	76500	85000	93500
Total weight, kg	90000	100000	110000