Railway package transformer substation for 27.5/0.4(0.23) kV
Railway package transformer substation of KTPZh, KTPZho (one-phase substation) series for 27.5/0.4(0.23) kV is designed to receive, transform, and distribute alternating-current electric power with a commercial frequency of 50 Hz and used for connecting non-traction railway consumers to two-wire-rail lines.
The following equipment is used in the 27.5/0.4 kV KTPZh series railway package transformer substation:
- power transformer of TMG (TM) and OMG series with a capacity of 2, 4, 10, 25, 40, 63, 100, 160, 250, 400 or 630kVA;
- overvoltage suppressors of OPN-27.5/33 UKhL1 (NF1 as per IEC) series;
- polymer or porcelain insulators;
- disconnector of RGPZ 1-II-35/1000 UKhL1 (NF1 as per IEC) series.
The design features and advantages of 27.5/0.4(0.23)kV railway package transformer substation are as follows:
- Electromechanical and electric interlocks are provided for in the substation.
- Tinned contact points.
- Double corrosion-resistant coating (with enamel).
- All required protection means are installed in KTPZh, KTPZho against: atmospheric (lightning) overvoltage and switching overvoltage; line-to-line faults; overcharging and line-to-line faults on 0.4 kV lines.
- Easy maintenance and serviceability.
- Reduced weight and size parameters.
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Parameter name
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Value
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|---|---|---|---|
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Power transformer capacity, kVA
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2;4; 10; 25; 40; 63; 100; 160; 250; 400; 630
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Rated (linear) voltage on the high-voltage side, kV
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27.5
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Maximum operating voltage on the high-voltage side, kV
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33
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Rated fuse current (rating) on the low-voltage side, kA
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2; 3.2; 5; 8; 10; 20
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Rated fuse-breaking current, kA
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3.2 – for Ir = 10 А;
8 – for other current ratings
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Air pollutant concentration according to GOST 9920
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II*; IV
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Ambient temperature
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-45º С; +40º С
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-60º С; +40º С
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KTPZh, KTPZho circuit insulation resistance, MΩ
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1000
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Sound level, no higher than, dBA
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60
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Winding circuit and vector group of transformer only tree phase
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Y/YN-0; Δ/YN-11
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Protection rating according to the enclosure type as per GOST 14254-80:
· for low-voltage cabinet
· for other components
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IP34
IP00
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Climatic category according to GOST/IEC
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N
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F
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Weight, no more than, kg
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5000
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Made in accordance with the Corporate Standard Ts 00212883 - 021:2014.