Power Transformer

Product

6-10kV SCB Resin-Insulated Dry-Type Transformer

Optimized Magnetic Circuit
Energy Saving & Reduced Loss
Low Noise
Strong Overload Capability
Compact Structure

Overview

1.1 Product Features

The resin-insulated dry-type transformer is developed by our company based on advanced international technologies. We have independently developed the SC(B)10, SC(B)11, SC(B)12, SC(B)13 and SC(B)14 series.

The transformers adopt epoxy resin vacuum casting technology, featuring flame retardancy, explosion-proof performance, maintenance-free operation, and environmental friendliness. They are compact in size and can be installed directly in load centers.

Through optimized structural design and resin casting technology, the transformer has reduced partial discharge, low noise, and strong heat dissipation capability. Under forced air cooling conditions, it can operate continuously at 140% of rated load.

The transformer is equipped with an intelligent temperature controller, providing functions such as fault alarm, over-temperature alarm, and tripping protection. It can also be connected to computers for remote monitoring and control.

Due to these advantages, the transformer is widely used in urban power distribution systems, including hotels, airports, high-rise buildings, commercial centers, residential areas, as well as demanding environments such as subways, power plants, ships, and offshore drilling platforms.

1.2 Core

The transformer core is made of high-quality imported cold-rolled silicon steel sheets with a fully mitered joint structure. The core columns are bound with glass fiber reinforced epoxy bands without adhesives.

The core surface is sealed with insulating resin coating, effectively preventing moisture and corrosion while reducing no-load loss, no-load current, and core noise. Special surface treatment is applied to structural components and fasteners, improving the overall appearance and quality of the product.

1.3 High-Voltage Winding

The high-voltage winding adopts epoxy resin vacuum pressure casting with quartz filler, which greatly reduces partial discharge and enhances the electrical strength of the winding.

The inner and outer surfaces of the winding are reinforced with glass fiber mesh plates, improving mechanical strength and short-circuit resistance. The winding structure ensures that the coil will not crack during operation.

1.4 Low-Voltage Winding

The low-voltage winding adopts a foil-wound structure, effectively eliminating axial spiral stress during winding and improving current balance.

At the same time, the winding is designed with axial air-cooling channels, enhancing heat dissipation performance. The winding layers use DMD epoxy resin prepreg insulation, forming a solid structure after curing.

1.5 Manufacturing Process

The windings are manufactured using high-precision winding machines, and the low-voltage winding adopts a foil-winding structure.

For transformers with larger capacities, ventilation channels are designed inside the windings. After winding, the coils undergo vacuum drying, followed by vacuum casting and curing strictly according to process requirements. All production processes are carefully monitored and adjusted when necessary.

The precise casting process ensures that the windings are free from bubbles and voids, resulting in high product quality.

1.6 Temperature Control and Air Cooling System

The transformer adopts a top-mounted cross-flow cooling fan, featuring low noise, high airflow, and an aesthetically pleasing design. This enhances the overload capability of the transformer.

An intelligent temperature controller is used for temperature monitoring, significantly improving the operational safety and reliability of the transformer.

1.7 Protective Enclosure and Busbar Arrangement

The protective enclosure provides additional safety protection for the transformer, with protection ratings such as IP20 and IP23 available. The enclosure can be manufactured from cold-rolled steel plate or stainless steel, according to user requirements.

The low-voltage outlet is typically connected through a standard busbar arrangement, and both

top and side cable outlet configurations are available. Customized outlet arrangements can also be designed according to customer requirements.

1.8 Transformer Cable Outlet Arrangement

Different cable outlet configurations can be provided according to various installation and connection requirements, including standard top cable outlet, standard side cable outlet, and other customized outlet arrangements designed according to user requirements.

1.9 Applicable Standards

GB/T10228 GB/T1094.1 GB/T1094.11 GB/T1094.12 GB/T4208 JB/T10088 GB20052

Model Designation

Product Display

Technical Data

Technical Data of SC(B)10 Series 6kV/10kV Off-Circuit Tap-Changing Dry-Type Transformers

Rated Capacity(KVA) Voltage Combination & Tapping Range Vector Group No-Load Loss(kW) Load Loss(KW) at Different
Insulation Thermal Classes
No-Load Current(%) Short-Circuit Impedance(%)
HV HV Tapping Range(%) LV Class B(130℃/100℃) Class F(155℃/120℃) Class H(180℃/145℃)
30 6
6.3
6.6
10
10.5
11
±2×2.5
±5
0.4 Dyn11
Yyn0
0.19  0.670 0.710 0.760 2.0 4
50 0.27  0.940 1.00 1.07 2.0
80 0.37  1.29 1.38 1.48 1.5
100 0.40  1.48 1.57 1.69 1.5
125 0.47  1.74 1.85 1.98 1.3
160 0.54  2.00 2.13 2.28 1.3
200 0.62  2.37 2.53 2.71 1.1
250 0.72  2.59 2.76 2.69 1.1
315 0.88  3.27 3.47 3.73 1.0
400 0.98  3.75 3.99 4.28 1.0
500 1.16  4.59 4.88 5.23 1.0
630 1.34  5.53 5.88 6.29 0.85
630 1.30  5.61 5.96 6.40 0.85 6
800 1.52  6.55 6.96 7.46 0.85
1000 1.77  7.65 8.13 8.76 0.85
1250 2.09  9.10 9.69 10.3 0.85
1600 2.45  11.0 11.7 12.5 0.85
2000 3.05  13.6 14.4 15.5 0.7
2500 3.60  16.1 17.1 18.4 0.7
1600 2.45  12.2 12.9 13.9 0.85 8
2000 3.05  15.0 15.9 17.1 0.7
2500 3.60  17.7 18.8 20.2 0.7

 

Technical Data of SC(B)11 Series 6kV/10kV Off-Circuit Tap-Changing Dry-Type Transformers

Rated Capacity(KVA) Voltage Combination & Tapping Range Vector Group No-Load Loss(kW) Load Loss(KW) at Different
Insulation Thermal Classes
No-Load Current(%) Short-Circuit Impedance(%)
HV HV Tapping Range(%) LV Class B(130℃/100℃) Class F(155℃/120℃) Class H(180℃/145℃)
30 6
6.3
6.6
10
10.5
11
±2×2.5
±5
0.4 Dyn11
Yyn0
0.17  0.670 0.710 0.760 2.0 4
50 0.24  0.940 1.00 1.07 2.0
80 0.33  1.29 1.38 1.48 1.5
100 0.36  1.48 1.57 1.69 1.5
125 0.42  1.74 1.85 1.98 1.3
160 0.48  2.00 2.13 2.28 1.3
200 0.55  2.37 2.53 2.71 1.1
250 0.64  2.59 2.76 2.69 1.1
315 0.79  3.27 3.47 3.73 1.0
400 0.88  3.75 3.99 4.28 1.0
500 1.04  4.59 4.88 5.23 1.0
630 1.20  5.53 5.88 6.29 0.85
630 1.17  5.61 5.96 6.40 0.85 6
800 1.36  6.55 6.96 7.46 0.85
1000 1.59  7.65 8.13 8.76 0.85
1250 1.88  9.10 9.69 10.3 0.85
1600 2.20  11.0 11.7 12.5 0.85
2000 2.74  13.6 14.4 15.5 0.7
2500 3.24  16.1 17.1 18.4 0.7
1600 2.20  12.2 12.9 13.9 0.85 8
2000 2.74  15.0 15.9 17.1 0.7
2500 3.24  17.7 18.8 20.2 0.7

 

Technical Data of SC(B)12 Series 6kV/10kV Off-Circuit Tap-Changing Dry-Type Transformers

Rated Capacity(KVA) Voltage Combination & Tapping Range Vector Group No-Load Loss(kW) Load Loss(KW) at Different
Insulation Thermal Classes
No-Load Current(%) Short-Circuit Impedance(%)
HV HV Tapping Range(%) LV Class B(130℃/100℃) Class F(155℃/120℃) Class H(180℃/145℃)
30 6
6.3
6.6
10
10.5
11
±2×2.5
±5
0.4 Dyn11
Yyn0
0.150  0.670 0.710 0.76 2.0 4
50 0.215  0.940 1.00 1.07 2.0
80 0.295  1.29 1.38 1.48 1.5
100 0.320  1.48 1.57 1.69 1.5
125 0.375  1.74 1.85 1.98 1.3
160 0.430  2.00 2.13 2.28 1.3
200 0.495  2.37 2.53 2.71 1.1
250 0.575  2.59 2.76 2.69 0.9
315 0.705  3.27 3.47 3.73 0.8
400 0.785  3.75 3.99 4.28 0.8
500 0.930  4.59 4.88 5.23 0.8
630 1.07  5.53 5.88 6.29 0.7
630 1.04  5.61 5.96 6.40 0.7 6
800 1.21  6.55 6.96 7.46 0.7
1000 1.41  7.65 8.13 8.76 0.7
1250 1.67  9.10 9.69 10.3 0.7
1600 1.96  11.0 11.7 12.5 0.7
2000 2.44  13.6 14.4 15.5 0.6
2500 2.88  16.1 17.1 18.4 0.6
1600 1.96  12.2 12.9 13.9 0.7 8
2000 2.44  15.0 15.9 17.1 0.6
2500 2.88  17.7 18.8 20.2 0.6

 

Technical Data – SC(B)13 Series 6kV/10kV Dry-Type Transformer

Rated Capacity(KVA) Voltage Combination & Tapping Range Vector Group No-Load Loss(kW) Load Loss(KW) at Different
Insulation Thermal Classes
No-Load Current(%) Short-Circuit Impedance(%)
HV HV Tapping Range(%) LV Class B(130℃/100℃) Class F(155℃/120℃) Class H(180℃/145℃)
30 6
6.3
6.6
10
10.5
11
±2×2.5
±5
0.4 Dyn11
Yyn0
0.135  0.605 0.640 0.685 2.0 4
50 0.195  0.845 0.900 0.965 2.0
80 0.265  1.16 1.24 1.33 1.5
100 0.290  1.33 1.41 1.52 1.5
125 0.340  1.56 1.66 1.78 1.3
160 0.385  1.80 1.91 2.05 1.3
200 0.445  2.13 2.27 2.44 1.1
250 0.515  2.33 2.48 2.66 0.9
315 0.635  2.94 3.12 3.35 0.8
400 0.705  3.37 3.59 3.85 0.8
500 0.835  4.13 4.39 4.70 0.8
630 0.965  4.97 5.29 5.66 0.7
630 0.935  5.05 5.36 5.76 0.7 6
800 1.09  5.89 6.26 6.71 0.7
1000 1.27  6.88 7.31 7.88 0.7
1250 1.50  8.19 8.72 9.33 0.7
1600 1.76  9.94 10.5 11.3 0.7
2000 2.19  12.2 13.0 14.0 0.6
2500 2.59  14.5 15.4 16.6 0.6
1600 1.76  11.0 11.6 12.5 0.7 8
2000 2.19  13.5 14.3 15.4 0.6
2500 2.59  15.9 17.0 18.2 0.6

Note:

Load loss values are given for different insulation systems at the reference temperatures specified

in GB/T1094.11. Values for other insulation systems can be calculated from the Class F (155℃) reference data.

 

Technical Data – SC(B)12 Series Grade 3 Energy-Efficient 6kV/10kV Dry-Type Transformers

Rated Capacity(KVA) Voltage Combination & Tapping Range Vector Group No-Load Loss(kW) Load Loss(KW) at Different
Insulation Thermal Classes
No-Load Current(%) Short-Circuit Impedance(%)
HV HV Tapping Range(%) LV Class B(130℃/100℃) Class F(155℃/120℃) Class H(180℃/145℃)
30 6
6.3
6.6
10
10.5
11
±2×2.5
±5
0.4 Dyn11
Yyn0
0.150  0.670 0.710 0.760 2.0 4
50 0.215  0.940 1.000 1.070 2.0
80 0.295  1.290 1.380 1.480 1.5
100 0.320  1.480 1.570 1.690 1.5
125 0.375  1.740 1.850 1.980 1.3
160 0.430  2.000 2.130 2.280 1.3
200 0.495  2.370 2.530 2.710 1.1
250 0.575  2.590 2.760 2.960 0.9
315 0.705  3.270 3.470 3.730 0.8
400 0.785  3.750 3.990 4.280 0.8
500 0.930  4.590 4.880 5.230 0.8
630 1.070  5.530 5.880 6.290 0.7
630 1.040  5.610 5.960 6.400 0.7 6
800 1.215  6.550 6.960 7.460 0.7
1000 1.415  7.650 8.130 8.760 0.7
1250 1.670  9.100 9.690 10.370 0.7
1600 1.960  11.050 11.730 12.580 0.7
2000 2.440  13.600 14.450 15.560 0.6
2500 2.880  16.150 17.170 18.450 0.6

Notes:

① Load loss values are given for different insulation systems at the reference temperatures specified in GB/T1094.11. Values for other insulation systems may be calculated from the Class F (155℃) reference data.

② No-load loss values comply with GB20052-2020 Grade 3 energy efficiency requirements.

 

Technical Data – SC(B)14 Series Grade 2 Energy-Efficient 6kV/10kV Dry-Type Transformers

Rated Capacity(KVA) Voltage Combination & Tapping Range Vector Group No-Load Loss(kW) Load Loss(KW) at Different
Insulation Thermal Classes
No-Load Current(%) Short-Circuit Impedance(%)
HV HV Tapping Range(%) LV Class B(130℃/100℃) Class F(155℃/120℃) Class H(180℃/145℃)
30 6
6.3
6.6
10
10.5
11
±2×2.5
±5
0.4 Dyn11
Yyn0
0.13  0.605 0.640 0.685 2.0 4
50 0.185  0.845 0.900 0.965 2.0
80 0.250  1.160 1.240 1.330 1.5
100 0.270  1.330 1.415 1.520 1.5
125 0.320  1.565 1.665 1.780 1.3
160 0.365  1.800 1.915 2.050 1.3
200 0.420  2.135 2.275 2.440 1.1
250 0.490  2.330 2.485 2.665 0.9
315 0.600  2.945 3.125 3.355 0.8
400 0.665  3.375 3.590 3.850 0.8
500 0.790  4.130 4.390 4.705 0.8
630 0.910  4.975 5.290 5.660 0.7
630 0.885  5.050 5.365 5.760 0.7 6
800 1.035  5.895 6.265 6.715 0.7
1000 1.205  6.885 7.315 7.885 0.7
1250 1.420  8.190 8.720 9.335 0.7
1600 1.665  9.945 10.555 11.320 0.7
2000 2.075  12.240 13.005 14.005 0.6
2500 2.450  14.535 15.445 16.605 0.6

Notes:

① Load loss values are given for different insulation systems at the reference temperatures specified in GB/T1094.11. Values for other insulation systems may be calculated from the Class F (155℃) reference data.

② No-load loss values comply with GB20052-2020 Grade 2 energy efficiency requirements.

 

Technical Data – SC(B)18 Series Grade 1 Energy-Efficient 6kV/10kV Dry-Type Transformers

Rated Capacity(KVA) Voltage Combination & Tapping Range Vector Group No-Load Loss(kW) Load Loss(KW) at Different
Insulation Thermal Classes
No-Load Current(%) Short-Circuit Impedance(%)
HV HV Tapping Range(%) LV Class B(130℃/100℃) Class F(155℃/120℃) Class H(180℃/145℃)
30 6
6.3
6.6
10
10.5
11
±2×2.5
±5
0.4 Dyn11
Yyn0
0.105  0.605 0.640 0.685 2.0 4
50 0.155  0.845 0.900 0.965 2.0
80 0.210  1.160 1.240 1.330 1.5
100 0.230  1.330 1.415 1.520 1.5
125 0.270  1.565 1.665 1.780 1.3
160 0.310  1.800 1.915 2.050 1.3
200 0.360  2.135 2.275 2.440 1.1
250 0.415  2.330 2.485 2.665 0.9
315 0.510  2.945 3.125 3.355 0.8
400 0.570  3.375 3.590 3.850 0.8
500 0.670  4.130 4.390 4.705 0.8
630 0.775  4.975 5.290 5.660 0.7
630 0.750  5.050 5.365 5.760 0.7 6
800 0.875  5.895 6.265 6.715 0.7
1000 1.020  6.885 7.315 7.885 0.7
1250 1.205  8.190 8.720 9.335 0.7
1600 1.415  9.945 10.555 11.320 0.7
2000 1.760  12.240 13.005 14.005 0.6
2500 2.080  14.535 15.445 16.605 0.6

Notes:

① Load loss values are given for different insulation systems at the reference temperatures specified in GB/T1094.11. Values for other insulation systems may be calculated from the Class F (155℃) reference data.

② No-load loss values comply with GB20052-2020 Grade 1 energy efficiency requirements.

Overall Dimensions

Overall Dimension Drawings of SC(B)10/SC(B)11 Series Off-Circuit Tap-Changing Dry-Type Transformers

Rated Capacity(kVA) Overall Dimensions(mm) Overall Dimensions with Enclosure(mm)
L1 W1 H1 D1 A1 L2 W2 H2 D2 A2
10 600 400 520 350 400 400 900 1150 400 800
20 600 400 520 350 400 400 900 1150 400 800
30 600 400 620 400 350 350 950 1200 400 850
50 630 450 660 400 350 350 950 1200 400 850
63 780 500 765 400 400 400 980 1300 400 880
80 780 500 765 400 400 400 1000 1300 400 900
100 890 650 830 550 550 550 1000 1300 550 900
125 910 650 850 550 550 550 1000 1400 550 900
160 950 750 965 550 660 660 1150 1450 550 1050
200 1000 750 1120 550 660 660 1150 1500 550 1050
250 1040 750 1155 660 660 660 1200 1550 660 1100
315 1080 750 1220 660 660 660 1200 1650 660 1100
400 1105 750 1225 660 660 660 1250 1800 660 1150
500 1150 900 1395 660 820 820 1250 1800 660 1150
630 1340 900 1330 820 820 820 1300 1700 820 1200
800 1400 900 1470 820 820 820 1350 1850 820 1250
1000 1460 900 1475 820 820 820 1400 1900 820 1300
1250 1485 900 1605 820 820 820 1400 1950 820 1300
1600 1580 1050 1680 950 950 950 1450 2050 950 1350
2000 1690 1050 1840 950 950 950 1550 2150 950 1450
2500 1765 1050 1885 1070 950 950 1600 2200 1070 1500
3150 1950 1170 1900 1070 1070 1070 1600 2250 1070 1500
4000 2030 1170 2000 1070 1070 1070 1600 2300 1070 1500

Notes:

① Dimensions are for reference only and may change due to product improvements. Custom dimensions are available upon request.

② For transformers ≤200 kVA, the enclosure is optional and not standard.

 

Outline Dimension Drawings of SC(B)12-SC(B)18 Series Dry-Type Transformers

Rated Capacity(kVA) Overall Dimensions(mm) Overall Dimensions with Enclosure(mm)
L1 W1 H1 D1 A1 L2 W2 H2 D2 A2
30 600 400 620 400 350 1050 950 1200 400 850
50 630 450 660 400 350 1050 950 1200 400 850
63 820 500 730 400 400 1050 980 1300 400 880
80 820 500 730 400 400 1050 1000 1300 400 900
100 840 650 770 550 550 1200 1000 1300 550 900
125 860 650 800 550 550 1200 1000 1400 550 900
160 900 750 870 550 660 1250 1150 1450 550 1050
200 940 750 950 550 660 1300 1150 1500 550 1050
250 1000 750 990 660 660 1400 1200 1550 660 1100
315 1040 750 1020 660 660 1400 1200 1650 660 1100
400 1080 750 1040 660 660 1500 1250 1800 660 1150
500 1130 900 1130 660 820 1550 1250 1800 660 1150
630 1370 900 1050 820 820 1700 1300 1700 820 1200
800 1420 900 1110 820 820 1750 1350 1850 820 1250
1000 1450 900 1200 820 820 1850 1400 1900 820 1300
1250 1500 900 1280 820 820 1850 1400 1950 820 1300
1600 1550 1050 1400 950 950 2000 1450 2050 950 1350
2000 1640 1050 1530 950 950 2050 1550 2150 950 1450
2500 1720 1050 1620 1070 950 2150 1600 2200 1070 1500

Notes:

① Dimensions are for reference only and may change due to product improvements. Custom dimensions are available upon request.

② For transformers ≤200 kVA, cooling fans are not supplied as standard.

WhatsApp
+86 13968737027
Phone
+86 189 6895 3236
Email
jubangexport@mccb.cn