SCB18-2500/35 - TAIXUANTECH

SCB18-2500/35 Three-Phase Two-Winding Dry-Type Air-Cooled Off-Circuit Tap-Changer Distribution Transformer

35kV Dry-Type Distribution Transformer Series

SCB18-2500/35 Three-Phase Two-Winding Dry-Type Air-Cooled Off-Circuit Tap-Changer Distribution Transformer

The SCB18-2500/35 is a three-phase, two-winding dry-type distribution transformer with epoxy resin casting and an off-circuit tap changer, rated at 2500kVA and 35kV on the high-voltage side. 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. Typical applications include commercial buildings, hospitals, airports, metro stations, industrial facilities, and other indoor locations where fire safety and reliable power supply are essential.

Data Center Industrial & Commercial Utility & Grid

Rated Capacity: 2500 kVA
Rated Voltage Ratio: 35/0.4 kV
Connection Group: Dyn11
Cooling Method: AN
Energy Efficiency Class: N/A
Standard：IEC 60076, GB/T 10228-2023

Product Details

Learn more about our products

Product Model SCB18-2500/35

No-Load Loss ≤3.0 kW

Rated Capacity 2500 kVA

No-Load Current ≤0.7%

Phase 3-phase

Load Loss (120°C) ≤19.62 kW

Rated Voltage Ratio 35/0.4 kV

Short-Circuit Impedance 6%

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 Dyn11 (Yyn0 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 / AC5

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 Distribution Transformer Series – Full Specifications

35kV, 3-phase, 2-winding, dry-type, off-circuit tap-changer, distribution transformer, 50-2500kVA
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 (%)
SCB18-50/35	50	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.304	1.206	1.278	1.368	6
SCB14-50/35	50	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.344	1.206	1.278	1.368	6
SCB12-50/35	50	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.365	1.340	1.420	1.520	6
SCB18-100/35	100	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.424	1.733	1.881	2.007	6
SCB14-100/35	100	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.480	1.733	1.881	2.007	6
SCB12-100/35	100	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.509	1.970	2.090	2.230	6
SCB18-160/35	160	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.533	2.385	2.529	2.700	6
SCB14-160/35	160	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.604	2.385	2.529	2.700	6
SCB12-160/35	160	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.639	2.650	2.810	3.000	6
SCB18-200/35	200	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.593	2.817	2.988	3.195	6
SCB14-200/35	200	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.672	2.817	2.988	3.195	6
SCB12-200/35	200	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.711	3.130	3.320	3.550	6
SCB18-250/35	250	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.668	3.222	3.420	3.654	6
SCB14-250/35	250	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.757	3.222	3.420	3.654	6
SCB12-250/35	250	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.801	3.580	3.800	4.060	6
SCB18-315/35	315	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.788	3.825	4.059	4.338	6
SCB14-315/35	315	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.893	3.825	4.059	4.338	6
SCB12-315/35	315	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.945	4.250	4.510	4.820	6
SCB18-400/35	400	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	0.923	4.590	4.869	5.211	6
SCB14-400/35	400	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.046	4.590	4.869	5.211	6
SCB12-400/35	400	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.107	5.100	5.410	5.790	6
SCB18-500/35	500	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.088	5.643	5.985	6.399	6
SCB14-500/35	500	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.233	5.643	5.985	6.399	6
SCB12-500/35	500	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.305	6.270	6.650	7.110	6
SCB18-630/35	630	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.253	6.525	6.921	7.407	6
SCB14-630/35	630	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.420	6.525	6.921	7.407	6
SCB12-630/35	630	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.503	7.250	7.690	8.230	6
SCB18-800/35	800	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.455	7.740	8.208	8.784	6
SCB14-800/35	800	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.649	7.740	8.208	8.784	6
SCB12-800/35	800	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.746	8.600	9.120	9.760	6
SCB18-1000/35	1000	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.635	8.874	9.360	9.990	6
SCB14-1000/35	1000	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.853	8.874	9.360	9.990	6
SCB12-1000/35	1000	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.962	9.860	10.400	11.100	6
SCB18-1250/35	1250	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	1.905	10.800	11.430	12.240	6
SCB14-1250/35	1250	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	2.159	10.800	11.430	12.240	6
SCB12-1250/35	1250	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	2.286	12.000	12.700	13.600	6
SCB18-1600/35	1600	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	2.183	13.140	13.860	14.850	6
SCB14-1600/35	1600	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	2.474	13.140	13.860	14.850	6
SCB12-1600/35	1600	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	2.619	14.600	15.400	16.500	6
SCB18-2000/35	2000	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	2.573	15.480	16.380	17.550	6
SCB14-2000/35	2000	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	2.916	15.480	16.380	17.550	6
SCB12-2000/35	2000	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	3.087	17.200	18.200	19.500	6
SCB18-2500/35	2500	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	3.000	18.540	19.620	20.970	6
SCB14-2500/35	2500	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	3.400	18.540	19.620	20.970	6
SCB12-2500/35	2500	35，36，37，38.5	±5%	0.4	Dyn11，Yyn0	3.600	20.600	21.800	23.300	6
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.Vector group options: Dyn11 or Yyn0. 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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SCB18-2500/35 Three-Phase Two-Winding Dry-Type Air-Cooled Off-Circuit Tap-Changer Distribution Transformer

35kV Dry-Type Distribution Transformer Series

SCB18-2500/35 Three-Phase Two-Winding Dry-Type Air-Cooled Off-Circuit Tap-Changer Distribution Transformer