Oil Immersed Fully Sealed Distribution Transformer 10kV 10.5kV 11kV

  • Oil Immersed Fully Sealed Distribution Transformer 10kV 10.5kV 11kV
Key attributes
Brand Vziman
Model NO. Oil Immersed Fully Sealed Distribution Transformer 10kV 10.5kV 11kV
Rated capacity 50kVA
Series S11
Product descriptions from the supplier
Description

Oil-Immersed Distribution Transformers Product Overview

The S13, S20, and S22 series Oil-Immersed Fully Sealed Distribution Transformers are suitable for use in AC 50Hz power systems with a rated voltage of up to 20kV. Designed as professional distribution transformers, they are applicable to industries such as oil & gas, metallurgy, chemical processing, textiles, light manufacturing, and other high-dust environments.

Oil-Immersed Distribution Transformers  Model Designation and Its Meanin

Oil-Immersed Distribution Transformers  Product Features

Core：The core of the Oil-Immersed Fully Sealed Distribution Transformer is made from high-permeability, grain-oriented cold-rolled silicon steel sheets. It features a new design with fully slanted joints and stacked construction, where the core column has a multi-step circular cross-section and the yoke matches the core's cross-sectional area. This structural design effectively enhances the product's operational stability.

Windings：The windings of the Oil-Immersed Fully Sealed Distribution Transformer utilize corrugated oil channels and do not require impregnation. They are tightly bound using binding straps. All windings are concentric coils: the high-voltage winding includes taps corresponding to different voltage requirements, which connect to the tap changer mounted on the tank cover. Voltage adjustments can only be made after power disconnection.

Safety Protection Devices：Oil-Immersed Fully Sealed Distribution Transformers ranging from 30kVA to 2000kVA are equipped with pressure relief valves. Gas relays with alarm and trip contacts can be installed based on user requirements.

Oil Temperature Measurement Device：All Oil-Immersed Fully Sealed Distribution Transformers feature a glass thermometer holder located at the top of the oil tank, extending into the oil by 120±10mm. For models between 1000kVA and 2000kVA, outdoor signal thermometers are installed.

Transformer Tank：The transformer tank of the Oil-Immersed Fully Sealed Distribution Transformer is constructed with corrugated walls. The surface is treated with anti-corrosion coating, ensuring a strong paint film. The corrugated cooling fins not only provide cooling but also have an "expansion" function, compensating for changes in transformer oil volume due to temperature fluctuations. Thus, this type of transformer does not require an oil conservator, reducing the overall height. During encapsulation, vacuum oil filling is adopted to completely remove moisture, preventing the transformer oil from coming into contact with air. This effectively avoids oxygen and moisture intrusion that could degrade insulation performance and accelerate oil aging, thus eliminating the need for periodic oil sample tests.

S11-M Series 10kV Oil-Immersed Fully Sealed Distribution Transformer Technical Specifications

Capacity (kVA) Rated Voltage (kV) Connection Group Designation  Losses (kW) Short-Circuit Impedance (%) No-Load Current (%) Weight (kg) External Dimensions (mm) Shaft Center Distance (mm)
High Voltage High Voltage Tap Low Voltage No-Load Load Oil Tank Weight Equipment Total Weight Total Weight
30 6
6.3
10
10.5
11		 ±5%
±2×2.5%		 0.4 Yyn0
Dyn11		 0.10 0.63/0.60 4.0 1.5 95 150 370 1070×660×960 400×400
50 0.13 0.91/0.87 1.3 110 210 460 1130×700×1010 400×400
63 0.15 1.09/1.04 1.2 115 240 505 1150×710×1070 550×550
80 0.18 1.31/1.25 1.2 135 300 600 1190×720×1130 550×550
100 0.20 1.58/1.50 1.1 135 330 610 1210×800×1140 550×550
125 0.24 1.89/1.80 1.1 153 388 720 1320×820×1160 550×550
160 0.28 2.31/2.20 1 164 448 800 1350×835×1190 550×550
200 0.34 2.73/2.60 1 182 540 910 1360×845×1225 550×550
250 0.40 3.2/3.05 0.9 217 655 1090 1380×875×1275 660×660
315 0.48 3.83/3.65 0.9 300 810 1390 1430×880×1390 660×660
400 0.57 4.52/4.30 0.8 330 940 1610 1500×880×1430 660×660
500 0.68 5.41/5.15 0.8 390 1190 1970 1590×900×1530 660×660
630 0.81 6.20 4.5 0.6 420 1360 2210 1670×930×1550 660×660
800 0.98 7.50 0.6 600 1570 2750 1750×1030×1640 660×660
1000 1.15 10.3 0.6 671 1672 3200 1790×1100×1730 820×820
1250 1.36 12.8 0.5 757 1964 3710 1930×1210×1750 820×820
1600 1.64 14.5 0.5 859 2382 4370 2000×1230×1860 820×820
2000 1.94 18.3 0.4 1000 2795 5130 2050×1340×2080 820×820
2500 2.29 21.2 0.4 1200 3200 5850 2100×1390×2250 820×820

Notes:

  • Distribution transformers with various special parameters and performance characteristics can be manufactured according to customer requirements.
  • The load loss values above the slash in the table apply to the Dyn11 connection group, while those below the slash apply to the Yyn0 connection group.
  • External dimensions and weights may vary based on customer and market requirements; therefore, the actual data provided in the factory documentation shall prevail.

S11 Type 10kV Oil-Immersed Fully Sealed Distribution Transformer Technical Specifications:

Capacity (kVA) Rated Voltage (kV) Connection Group Designation  Losses (kW) Short-Circuit Impedance (%) No-Load Current (%) Weight (kg) External Dimensions (mm) Shaft Center Distance (mm)
High Voltage High Voltage Tap Low Voltage No-Load Load Oil Tank Weight Equipment Total Weight Total Weight
200 6
6.3
10
10.5		 ±4×2.5% 0.4 Yyn0
Dyn11		 0.38 2.90 4.0 1.0 280 605 1280 1700×980×1550 550×550
250 0.44 3.42 0.90 320 670 1330 1780×995×1590 550×550
315 0.53 4.10 0.90 435 845 1715 1935×1220×1725 660×660
400 0.64 4.95 0.80 480 1010 1980 2025×1350×1850 660×660
500 0.76 5.89 0.80 530 1300 2350 2080×1410×1920 660×660
630 0.96 7.26 4.5




 0.60 715 1525 2950 2110×1460×1980 820×820
800 1.12 8.89 0.60 900 1595 3405 2470×1630×2270 820×820
1000 1.36 10.4 0.60 795 1730 3420 2560×1675×2540 820×820
1250 1.56 12.3 0.50 980 2650 4610 2605×1720×2770 820×820
1600 1.92 14.7 0.50 1210 3105 5350 2610×1850×2810 1070×1070
2000 2.27 18.6 5

 0.40 1780 3520 6800 2780×2475×2815 1070×1070
2500 2.68 21.6 0.40 2050 3985 8040 2820×2425×2635 1070×1070

Note:

  • Transformers with various special parameters and performance characteristics can be manufactured according to customer requirements.
  • External dimensions and weights may vary based on customer and market needs; therefore, the data for these two items in the table are subject to the official factory documentation.

S11 Type 35kV Oil-Immersed Fully Sealed Distribution Transformer with Off-Circuit Tap Changer Technical Specifications:

Capacity (kVA) Rated Voltage (kV) Connection Group Designation  Losses (kW) Short-Circuit Impedance (%) No-Load Current (%) Weight (kg) External Dimensions (mm) Shaft Center Distance (mm)
High Voltage High Voltage Tap Low Voltage No-Load Load Oil Tank Weight Equipment Total Weight Total Weight
50 35
38.5		 ±5%
±2×2.5%		 0.4 Yyn0
Dyn11		 0.16 1.20 6.5 1.3 330 300 860 1195×935×1825 660×660
100 0.23 2.01 1.1 385 470 1130 1200×965×1935 660×660
125 0.27 2.37 1.1 465 550 1335 1235×940×1955 660×660
160 0.28 2.82 1.0 485 580 1475 1285×895×1960 660×660
200 0.34 3.32 1.0 595 680 1755 1310×1150×1985 660×660
250 0.40 3.95 0.95 650 860 2000 1450×1090×2010 660×660
315 0.48 4.75 0.95 765 980 2290 1630×1065×2110 820×820
400 0.58 5.74 0.85 885 1170 2725 1850×1155×2015 820×820
500 0.68 6.91 0.85 960 1340 3090 2045×1205×2415 820×820
630 0.83 7.86 0.65 895 1550 3810 2085×1240×2515 820×820
800 0.98 9.4 0.65 1030 1990 4510 2305×1615×2685 820×820
1000 1.15 11.5 0.65 1475 2415 5055 2545×1540×2590 820×820
1250 1.40 13.9 0.60 1485 2480 5290 2495×2010×2675 820×820
1600 1.69 16.6 0.60 1490 2600 5450 2680×2100×2970 820×820
2000 1.99 19.7 0.55 1495 3275 6380 2545×2650×2740 820×820
2500 2.36 23.2 0.55 1795 3575 7230 2570×2490×2875 1070×1070

Note:

  • Transformers with various special parameters and performance characteristics can be manufactured according to customer requirements.
  • External dimensions and weights may vary depending on customer and market demands; therefore, the data for these two items in the table shall be as specified in the official factory documentation.

S13-M Series 10kV Oil-Immersed  Fully Sealed Distribution Transformer Technical Specifications:

Capacity (kVA) Rated Voltage (kV) Connection Group Designation  Losses (kW) Short-Circuit Impedance (%) No-Load Current (%) Weight (kg) External Dimensions (mm) Shaft Center Distance (mm)
High Voltage High Voltage Tap Low Voltage No-Load Load Oil Tank Weight Equipment Total Weight Total Weight
30 6
6.3
10
10.5
11		 ±5%
±2×2.5%		 0.4 Yyn0
Dyn11		 0.08 0.63/0.60 4.0 1.61 95 150 280 810x650x820 400×400
50 0.1 0.91/0.87 1.4 110 210 390 820x680x840 400×400
63 0.11 1.09/1.04 1.33 115 240 440 850x700x860 550×550
80 0.13 1.31/1.25 1.33 135 300 495 900x730x930 550×550
100 0.15 1.58/1.50 1.26 135 330 600 910x750x990 550×550
125 0.17 1.89/1.80 1.19 153 388 690 1000x760x1060 550×550
160 0.20 2.31/2.20 1.12 164 448 780 1090x770x1135 550×550
200 0.24 2.73/2.60 1.05 182 540 910 1120x790x1165 550×550
250 0.29 3.2/3.05 0.98 217 655 1040 1140x810x1220 660×660
315 0.34 3.83/3.65 0.98 300 810 1190 1170x830x1240 660×660
400 0.41 4.52/4.30 0.91 330 940 1430 1220x1020x1270    660×660
500 0.48 5.41/5.15 0.84 390 1190 1650 1300x1180x1320 660×660
630 0.57 6.20 4.5 0.77 420 1360 2030 1500x1210x1480 660×660
800 0.70 7.50 0.70 600 1570 2320 1840x1250x1620 660×660
1000 0.83 10.3 0.70 671 1672 2600 1890x1400x1680 820×820
1250 0.97 12.0 0.63 757 1964 2890 2050x1460x1710 820×820
1600 1.17 14.5 0.56 859 2382 3380 2200x1520x1950 820×820

Note:

  • Distribution transformers with various special parameters and performance characteristics can be manufactured according to customer requirements.
  • The load loss values shown above the slash in the table apply to the Dyn11 connection group, while those below the slash apply to the Yyn0 connection group.
  • External dimensions and weights may vary based on customer and market requirements; therefore, the data for these two items in the table are subject to the official factory documentation.
Application Scenarios for Oil Immersed Fully Sealed Distribution Transformer
  • Urban Distribution Network Renovation: The Oil Immersed  Distribution Transformer is suitable for 10kV/11kV urban grid nodes. Its fully sealed structure resists high humidity and dust, ensuring long-term stable outdoor operation and reducing O&M costs.
  • Industrial Park Power Supply: The Oil Immersed  Distribution Transformer is compatible with 10.5kV voltage. It isolates industrial corrosive gases and features a maintenance-free design, meeting the continuous production power demand of industrial parks.
  • Rural & Remote Area Power Distribution: The Oil Immersed Distribution Transformer flexibly matches 10kV/11kV voltage grades. Its fully sealed structure eliminates the need for oil refilling, addressing the shortage of O&M resources in remote areas.
  • Commercial Building Power Distribution: The Oil Immersed Distribution Transformer boasts a compact, fully sealed structure, suitable for 10kV indoor and outdoor installation, and avoids safety hazards caused by oil leakage.
  • New Energy Grid Connection: The Oil Immersed Distribution Transformer adapts to 10.5kV/11kV grid connection voltage. It resists harsh environments and copes with current fluctuations from new energy power generation.
  • Municipal Engineering Power Distribution: The Oil Immersed Distribution Transformer supports 10kV temporary and permanent power supply, and its fully sealed performance adapts to the complex environment of construction sites.
Operating Conditions for Oil-Immersed Fully Sealed Distribution Transformer
  • Ambient Temperature：The Oil-Immersed Fully Sealed Distribution Transformer is suitable for use in environments with a temperature range of -25℃ to 40℃. For areas where the temperature is lower than -25℃, low-temperature resistant transformer oil must be used to ensure the fluidity of the oil and the normal operation of the Oil-Immersed Fully Sealed Distribution Transformer.
  • Ambient Humidity：The Oil-Immersed Fully Sealed Distribution Transformer can operate in an environment with a relative humidity not exceeding 90% (at 25℃, no condensation). Its fully sealed structure can effectively prevent moisture from entering the interior, so the Oil-Immersed Fully Sealed Distribution Transformer is also adaptable to humid scenarios such as coastal industrial zones and underground substations.
  • Environmental Cleanliness：The Oil-Immersed Fully Sealed Distribution Transformer allows moderate dust in the operating environment, but it is strictly prohibited to use it in places with heavy dust accumulation, corrosive gases or flammable and explosive vapors. For dusty working conditions such as metallurgy and mining, simple dust-proof shielding measures should be taken for the Oil-Immersed Fully Sealed Distribution Transformer to avoid dust affecting the insulation performance of internal components.
  • Power System Parameters：The Oil-Immersed Fully Sealed Distribution Transformer is applicable to AC 50Hz (or 60Hz customized) power systems, and the system voltage fluctuation should not exceed ±5% of the transformer's rated voltage. It is forbidden to operate the Oil-Immersed Fully Sealed Distribution Transformer beyond the rated capacity for a long time to prevent overheating and damage to the equipment.
  • Installation Site Requirements：The Oil-Immersed Fully Sealed Distribution Transformer should be installed in a well-ventilated site without severe vibration and impact. The installation ground should be flat and firm, which can bear the weight of the Oil-Immersed Fully Sealed Distribution Transformer and avoid equipment displacement or deformation during operation.
Documentation Resource Library
Dimension and installation for S11-XXXX/10.5 Oil-immersed distribution transformers
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Dimension and installation for S11-XXXX/10.5 Oil-immersed distribution transformers
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Vziman IEC/ ANSI Oil-immersed Power transformer selection catalog
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Vziman IEC/ ANSI Oil-immersed Power transformer selection catalog
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