SC(B)12 (10 kV, 20 kV) Series Three-Phase Resin-Insulated Dry-Type Distribution Transformer

Product Overview The SC(B)10-13 series 20 kV dry-type transformers are developed by our company through the introduction of advanced foreign technologies. Featuring epoxy resin cast windings, these transformers offer flame retardancy, fire resistance, explosion-proof performance, maintenance-free operation, and zero environmental pollution. With a compact footprint, they can be directly installed at load centers. Their scientifically sound design and casting process ensure low partial discharge levels, reduced noise, and excellent heat dissipation. Equipped with an intelligent temperature controller and an RS485 serial interface for connection to a computer, they enable centralized monitoring and control. Due to these outstanding features, our dry-type transformers are widely used in power transmission and distribution systems across critical facilities such as hotels, airports, high-rise buildings, commercial centers, residential complexes, as well as harsh environments like subways, metallurgical plants, power stations, ships, and offshore drilling platforms. Product Features 1. Flame-retardant, explosion-proof, pollution-free, maintenance-free, and capable of decentralized installation at load centers, reducing investment costs and saving expenses. 2. Low losses and excellent energy-saving performance, delivering significant operational cost savings. 3. Partial discharge levels below 10 pC; windings resist moisture and dust absorption, offering high mechanical strength and superior reliability, further reducing costs. 4. Excellent short-circuit withstand capability and strong lightning surge protection. 5. Housing options include stainless steel, cold-rolled sheet, and aluminum alloy; available in forced-air or natural cooling configurations, with multiple cable entry/exit arrangements (top-in/top-out, bottom-in/top-out, or bottom-in/bottom-out). 6. Transformers can be customized with temperature control and display systems upon request, compatible with external temperature management systems. Ordering Notes When placing an order, please provide the following parameters: 1. Product model number 2. Rated capacity 3. Voltage configuration 4. Voltage regulation range 5. Frequency 6. Connection group designation 7. Short-circuit impedance 8. Special technical requirements, if any Technical Data Sheet for SC(B)11 Series 20 kV Three-Phase Resin-Insulated Dry-Type Distribution Transformers Rated Rated Voltage Connection No-load Current (%) No-load Losses (W) Load Losses (W) at 75°C Impedance Voltage (%) Capacity Group (kVA) High Voltage (kV) Low Voltage (kV) 50 20 0.4 Yyn0 2 272 1230 4 80 — — 2 368 1680 ±2×2.5% Dyn11 — — — 870 100 — — 1.8 432 1990 125 — — 1.8 472 2190 160 — — 1.5 536 2470 200 — — 1.5 584 2940 250 — — 1.3 672 3420 315 — — 1.3 776 4080 400 — — 1.1 920 4840 500 — — 1.1 1080 5790 630 — — 1 1220 6840 6 800 — — 1 1400 8260 1000 — — 0.85 1660 9780 1250 — — 0.85 1900 11500 1600 — — 0.85 2230 13800 2000 — — 0.7 2590 16300 2500 — — 0.7 3100 21200 2000 — — 0.7 2590 17800 8 2500 — — 0.7 3100 21200

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Dry-type transformer series

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Product Description

　Product Overview
　　The SC(B)10‑13 series, rated at 20 kV, incorporates advanced foreign technologies. Its windings are cast in epoxy resin, providing flame retardancy, fire resistance, explosion protection, maintenance‑free operation, and zero environmental impact. With a compact footprint, it can be installed directly at the load center. A scientifically sound design and precise casting process ensure low partial discharge levels, low noise, and excellent heat dissipation. Equipped with an intelligent temperature controller and an RS‑485 serial interface for connection to a computer, it enables centralized monitoring and control. Thanks to these features, our dry‑type transformers are widely used in power transmission and distribution systems—such as hotels, airports, high‑rise buildings, commercial centers, and residential complexes—as well as in harsh environments like subways, metallurgical plants, power stations, ships, and offshore drilling platforms.
　　Product Features
　　1. Flame-retardant, explosion-proof, pollution-free, maintenance-free, and capable of decentralized installation at the load center, thereby reducing capital investment and lowering costs.
　　2. Low losses and excellent energy-saving performance deliver significant operational cost savings.
　　3. Partial discharge level is less than 10 pC; the coil is non-hygroscopic and dust‑resistant, with high mechanical strength and excellent reliability, resulting in cost savings.
　　4. Excellent short-circuit resistance and superior lightning‑impulse withstand capability.
　　5. The enclosure is available in three materials—stainless steel, cold-rolled sheet, and aluminum alloy—and comes in two configurations: exhaust‑type and heat‑dissipation type. Cable entry and exit can be configured as top‑in/top‑out, bottom‑in/top‑out, or bottom‑in/bottom‑out.
　　6. The transformer can be equipped with a temperature control and display system upon customer request, and it can be used in conjunction with a temperature control system.
　Ordering Instructions
　　When placing your order, please provide the following parameters:
　　1. Product Model
　　2. Rated Capacity
　　3. Voltage Combination
　　4. Scope of Adjustment
　　5. Frequency
　　6. Connection Group Designation
　　7. Short-circuit impedance
　　8. For products with special requirements, specify the technical specifications.

Technical Data Sheet for SC(B)11 Series 20 kV Three-Phase Resin-Insulated Dry-Type Distribution Transformers

Rated	Rated voltage		Connection	No-load current (%)	No-load loss (W)	Load Loss (W) (75°C)	Impedance Voltage (%)

Capacity			Group

(kVA)	High voltage (kV)	Low voltage (kV)
50	20	0.4	Yyn0	2	272	1230	4
80				2	368	1680
	±2×2.5%		Dyn11
						870
100				1.8	432	1990
125				1.8	472	2190
160				1.5	536	2470
200				1.5	584	2940
250				1.3	672	3420
315				1.3	776	4080
400				1.1	920	4840
500				1.1	1080	5790
630				1	1220	6840	6
800				1	1400	8260
1000				0.85	1660	9780
1250				0.85	1900	11500
1600				0.85	2230	13800
2000				0.7	2590	16300
2500				0.7	3100	19300
2000				0.7	2590	17800	8
2500				0.7	3100	21200	8