SCB18-12500/35 - TAIXUANTECH

SCB18-12500/35 Three-Phase Two-Winding Dry-Type Air-Cooled Off-Circuit Tap-Changer Power Transformer

35kV Dry-Type Power Transformer Series

SCB18-12500/35 Three-Phase Two-Winding Dry-Type Air-Cooled Off-Circuit Tap-Changer Power Transformer

The SCB18-12500/35 is a three-phase, two-winding dry-type power transformer with epoxy resin casting and an off-circuit tap changer, rated at 12500kVA and 35kV on the high-voltage side, with a low-voltage side of 10.5kV (6.3kV, 6.6kV, and 11kV available upon request). It is designed for indoor applications where fire safety, moisture resistance, and maintenance-free operation are essential. The transformer features vacuum-cast epoxy resin insulation, providing excellent flame retardancy and pollution resistance. The core is made of high-quality cold-rolled grain-oriented silicon steel, and low-voltage windings use copper foil conductors, ensuring low partial discharge, low temperature rise, and strong short-circuit withstand capability. It is suitable for large-capacity power transmission and distribution scenarios with strict fire safety requirements. Typical applications include large industrial facilities, commercial complexes, data centers, substations, and other indoor locations where fire safety and reliable power supply are essential.

Data Center Industrial & Commercial Utility & Grid

Rated Capacity: 12500 kVA
Rated Voltage Ratio: 35/10.5 kV
Connection Group: YNd11 (Yd11 available upon request)
Cooling Method: AN
Energy Efficiency Class: N/A
Standard：IEC 60076, GB/T 10228-2023

Product Details

Learn more about our products

Product Model SCB18-12500/35

No-Load Loss ≤10.575 kW

Rated Capacity 12500 kVA

No-Load Current ≤0.35%

Phase 3-phase

Load Loss (120°C) ≤58.14 kW

Rated Voltage Ratio 35/10.5 kV

Short-Circuit Impedance 9%

HV Tapping Range ±2×2.5%

Temperature Rise Limit Winding ≤100K (F-class)

Rated Frequency 50 Hz

Noise (Sound Pressure Level) ≤65 dB(A)

Connection Group YNd11 (Yd11 available upon request)

Protection Degree IP20 (IP23 available)

Cooling Method AN

Standard IEC 60076, GB/T 10228-2023

Insulation Class F (155°C), LI170 AC70 / LI75 AC35

Energy Efficiency Class N/A

01.

Core advantages

Low Loss Design (SCB18 Level)

Designed with SCB18-level low-loss core and winding. Compared with conventional models, no-load loss is significantly reduced, delivering energy savings over the transformer's service life, especially for continuous light-load applications such as data centers and commercial buildings. Actual measured losses are typically lower than reference values, and detailed test data can be provided upon request.

Vacuum-Cast Epoxy Resin

High and low voltage windings are fully impregnated in F-class epoxy resin under vacuum conditions, providing excellent flame retardancy, moisture resistance, and pollution resistance. The transformer is maintenance-free and suitable for indoor installation, including basements, tunnels, and other enclosed spaces.

Low Partial Discharge & Strong Short-Circuit Withstand

Optimized insulation structure and copper foil low-voltage windings ensure low partial discharge and strong short-circuit withstand capability. The transformer maintains stable operation under continuous load with a long service life.

02.

Application scenarios

No data was found

01.

Authoritative Certification

Our transformers are CE certified, ensuring full compliance with EU safety, health, and environmental standards.

Our transformers are UL certified, confirming they meet rigorous ANSI/IEEE safety standards for North American market entry.

ASTA

Our transformers have obtained ASTA type-test certification, verifying IEC 60076 compliance.

EAC

Our transformers are EAC certified, ensuring compliance with safety and EMC regulations for the Eurasian market.

SASO

We provide SASO-compliant transformers and assist clients in obtaining the Batch Certificate of Conformity (CoC) through the SABER platform.

02.

Quality Assurance

Partner Factory Audit

Regular on-site audits of partner factories to verify ISO, CE, and UL certifications.

Full-Process Quality Control

From raw material inspection to pre-shipment final inspection, every unit is checked against specifications.

Comprehensive Test Reports

Each transformer includes a detailed factory test report. 100% full inspection before dispatch.

Third-Party Inspection Support

SGS, BV, or other accredited third-party inspection available upon customer request.

01.

Technical Documents

No data was found

02.

Certification Materials

No data was found

35kV Dry-Type Power Transformer Series – Full Specifications

35kV, 3-phase, 2-winding, dry-type, off-circuit tap-changer, power transformer, 800-25000kVA
Model	Rated Capacity (kVA)	HV (kV)	HV Tapping Range	LV (kV)	Vector Group	No-Load Loss (kW)	Load Loss (kW)			Impedance Voltage (%)
Model	Rated Capacity (kVA)	HV (kV)	HV Tapping Range	LV (kV)	Vector Group	No-Load Loss (kW)	B（100℃）	F（120℃）	H（145℃）	Impedance Voltage (%)
SCB18-800/35	800	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	1.515	7.983	8.460	9.000	6
SCB14-800/35	800	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	1.717	7.983	8.460	9.000	6
SCB12-800/35	800	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	1.818	8.870	9.400	10.000	6
SCB18-1000/35	1000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	1.800	9.270	9.810	10.440	6
SCB14-1000/35	1000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	2.040	9.270	9.810	10.440	6
SCB12-1000/35	1000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	2.160	10.300	10.900	11.600	6
SCB18-1250/35	1250	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	2.108	10.890	11.610	12.420	6
SCB14-1250/35	1250	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	2.389	10.890	11.610	12.420	6
SCB12-1250/35	1250	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	2.529	12.100	12.900	13.800	6
SCB18-1600/35	1600	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	2.490	13.140	13.860	14.850	6
SCB14-1600/35	1600	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	2.822	13.140	13.860	14.850	6
SCB12-1600/35	1600	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	2.988	14.600	15.400	16.500	6
SCB18-2000/35	2000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	2.850	15.480	16.380	17.550	7
SCB14-2000/35	2000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	3.230	15.480	16.380	17.550	7
SCB12-2000/35	2000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	3.420	17.200	18.200	19.500	7
SCB18-2500/35	2500	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	3.278	18.540	19.620	20.970	7
SCB14-2500/35	2500	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	3.715	18.540	19.620	20.970	7
SCB12-2500/35	2500	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	3.933	20.600	21.800	23.300	7
SCB18-3150/35	3150	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	4.065	20.790	22.050	23.580	8
SCB14-3150/35	3150	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	4.607	20.790	22.050	23.580	8
SCB12-3150/35	3150	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	4.878	23.100	24.500	26.200	8
SCB18-4000/35	4000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	4.733	24.930	26.460	28.350	8
SCB14-4000/35	4000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	5.364	24.930	26.460	28.350	8
SCB12-4000/35	4000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	5.679	27.700	29.400	31.500	8
SCB18-5000/35	5000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	24.675	29.610	31.410	33.660	8
SCB14-5000/35	5000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	27.965	29.610	31.410	33.660	8
SCB12-5000/35	5000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	29.610	32.900	34.900	37.400	8
SCB18-6300/35	6300	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	6.683	34.650	36.720	39.330	8
SCB14-6300/35	6300	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	7.574	34.650	36.720	39.330	8
SCB12-6300/35	6300	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，Yyn0	8.019	38.500	40.800	43.700	8
SCB18-8000/35	8000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	7.575	39.060	41.400	44.370	9
SCB14-8000/35	8000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	8.585	39.060	41.400	44.370	9
SCB12-8000/35	8000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	9.090	43.400	46.000	49.300	9
SCB18-10000/35	10000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	8.700	47.160	49.950	53.460	9
SCB14-10000/35	10000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	9.860	47.160	49.950	53.460	9
SCB12-10000/35	10000	35，36，37，38.5	±5%	3.15，6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	10.440	52.400	55.500	59.400	9
SCB18-12500/35	12500	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	10.575	54.810	58.140	62.190	9
SCB14-12500/35	12500	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	11.985	54.810	58.140	62.190	9
SCB12-12500/35	12500	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	12.690	60.900	64.600	69.100	9
SCB18-16000/35	16000	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	12.975	64.530	68.400	73.170	9
SCB14-16000/35	16000	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	14.705	64.530	68.400	73.170	9
SCB12-16000/35	16000	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	15.570	71.700	76.000	81.300	9
SCB18-20000/35	20000	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	15.450	72.540	76.950	82.350	10
SCB16-20000/35	20000	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	17.510	72.540	76.950	82.350	10
SCB12-20000/35	20000	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	18.540	80.600	85.500	91.500	10
SCB18-25000/35	25000	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	18.225	85.770	90.900	97.200	10
SCB16-25000/35	25000	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	20.655	85.770	90.900	97.200	10
SCB12-25000/35	25000	35，36，37，38.5	±5%	6，6.3，10，10.5，11	Dyn11，Yd11，YNd11	21.870	95.300	101.000	108.000	10
Note： 1.Tapping range options: ±5% or ±2×2.5%. ±5% is shown as default in this table. Other tapping ranges are available upon request. 2.Other high and low voltages are available upon request. 3.Other vector groups are available upon request. 4.Insulation class: B/F/H available. Load losses are shown for reference temperatures of 100°C (Class B), 120°C (Class F), and 145°C (Class H) respectively. 5.For IEC, ANSI, or other standards, or special frequency requirements, please contact us for a customized datasheet.

* For specific product requests, please Contact Us for customized solutions to your needs.

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SCB18-12500/35 Three-Phase Two-Winding Dry-Type Air-Cooled Off-Circuit Tap-Changer Power Transformer

35kV Dry-Type Power Transformer Series

SCB18-12500/35 Three-Phase Two-Winding Dry-Type Air-Cooled Off-Circuit Tap-Changer Power Transformer