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Home > Products > 10, 110, and 220 kV power transformers for railways > TMZh type three-phase oil-immersed railway transformers

TMZh type three-phase oil-immersed railway transformers

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TMZh type three-phase oil-immersed transformers, rated 25–1600 kVA, with natural oil cooling and off-circuit tap changer (DETC). Suitable for operation in AC systems at 50 Hz. Designed for conversion of three-phase electrical energy from 27.5 kV to 0.4 kV for railway auxiliary power supply systems. Intended for operation in temperate climatic conditions at installation altitudes up to 1,000 m above sea level. Manufactured in accordance with O’zDSt and Ts 00212908-08:2018 standards.
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Description

TMZh type three-phase oil-immersed transformers, rated 25–1600 kVA, with natural oil cooling and off-circuit tap changer (DETC). Suitable for operation in AC systems at 50 Hz. Designed for conversion of three-phase electrical energy from 27.5 kV to 0.4 kV for railway auxiliary power supply systems. Intended for operation in temperate climatic conditions at installation altitudes up to 1,000 m above sea level. Manufactured in accordance with O’zDSt and Ts 00212908-08:2018 standards.

Power range

Rated power range: 25–1600 kVA
HV winding rated voltage: 27.5 kV
DETC (off-circuit tap changer) regulation range (HV side): ±2 × 2.5%
Climatic category: U1 / UHL1 / T1

Transformer symbols

T — Three-phase transformer
M — Oil-immersed transformer with natural air and oil circulation
Zh — Railway application transformer
X — Rated power, kVA
27.5 — HV winding rated voltage, kV
U1 — Climatic category and installation type in accordance with GOST 15150


Characteristic

Technical Characteristics for TMZh transformers, rated 25 ÷ 1600 kVA
Rated power, kVA
Rated voltage, kV
Winding connection diagram and vector group
Losses, W
Short-circuit voltage, %
No-load current, %
No-load
Short-circuit
25
27,5/0,4
У/Ун-0
175
610
6 2,0
100
27,5/0,4
У/Ун-0; Д/Ун-11
380
1970
6 1,2
160
27,5/0,4
У/Ун-0; Д/Ун-11
560
2650
6 1,0
250
27,5/0,4
У/Ун-0; Д/Ун-11
800
3700
6 0,8
400
27,5/0,4
У/Ун-0; Д/Ун-11
1090
 5900
6 0,6
630
27,5/0,4
Д/Ун-11
1700
8500
6 0,5
1000
27,5/0,4
У/Ун-0
2000
1150
7,2 0,4
1600 27,5/0,4 У/Ун-0 2750 18000 7,2 0,3

Overall and Mounting Dimensions

Transformer overall dimensions
Rated power, kVA
Length (L), mm
Width (B), mm
Height (H), mm
Distance between channel centerlines
Oil weight, kg
Total weight, kg
Longitudinal axis (A), mm
Transverse axis (A1), mm
25
1040
820
1310
400
550
175
600
100
1200
840
1640
420
605
310
1040
160
1300
860
1700
420
605
380
1290
250
1400
930
1890
420
605
330
1700
400
1460
960
2000
760
760
565
2095
630
1950
1240
2130 820
820
950
3500
1000
2310
1270
2385
1070
1070
950
3850
1600 2610 1285 2560 1070 1070 1340 4800

Dimensional drawings

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TMZh type three-phase oil-immersed transformers, rated 25–1600 kVA, with natural oil cooling and off-circuit tap changer (DETC). Suitable for operation in AC systems at 50 Hz. Designed for conversion of three-phase electrical energy from 27.5 kV to 0.4 kV for railway auxiliary power supply systems. Intended for operation in temperate climatic conditions at installation altitudes up to 1,000 m above sea level. Manufactured in accordance with O’zDSt and Ts 00212908-08:2018 standards.
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Tusov Artem Aleksandrovich
Deputy Director for Marketing and Sales

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