SCBH17-500/20 - TAIXUANTECH

SCBH17-500/20 Three-Phase Two-Winding Dry-Type Off-Circuit Tap-Changer Distribution Transformer

20kV Dry-Type Amorphous Alloy Distribution Transformer Series

SCBH17-500/20 Three-Phase Two-Winding Dry-Type Off-Circuit Tap-Changer Distribution Transformer

The SCBH17-500/20 is a three-phase, two-winding dry-type distribution transformer with epoxy resin casting, an amorphous alloy core, and an off-circuit tap changer, rated at 500kVA and 20kV on the high-voltage side. The amorphous alloy core significantly reduces no-load loss compared with conventional silicon steel transformers, delivering substantial energy savings over the transformer’s service life. The transformer features vacuum-cast epoxy resin insulation, providing excellent flame retardancy, moisture resistance, and maintenance-free operation. The amorphous alloy core is made of high-quality ultra-thin alloy strips with a three-frame, three-column structure, 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, and other indoor locations where fire safety and reliable power supply are essential.

Data Center Industrial & Commercial Utility & Grid

Rated Capacity: 500 kVA
Rated Voltage Ratio: 20/0.4 kV
Connection Group: Dyn11
Cooling Method: AN
Energy Efficiency Class: N/A
Standard：IEC 60076, GB/T 22072-2018

Product Details

Learn more about our products

Product Model SCBH17-500/20

No-Load Loss ≤0.369 kW

Rated Capacity 500 kVA

No-Load Current ≤0.5%

Phase 3-phase

Load Loss (120°C) ≤5.501 kW

Rated Voltage Ratio 20/0.4 kV

Short-Circuit Impedance 6%

HV Tapping Range ±5%

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

Rated Frequency 50 Hz

Noise (Sound Pressure Level) ≤55 dB(A)

Connection Group Dyn11

Protection Degree IP20 (IP23 available)

Cooling Method AN

Standard IEC 60076, GB/T 22072-2018

Insulation Class F (155°C), LI125 AC50 / AC5

Energy Efficiency Class N/A

01.

Core advantages

Ultra-Low No-Load Loss

The amorphous alloy core reduces no-load loss by approximately 60–75% compared with conventional silicon steel transformers. This advantage is most pronounced in continuous light-load applications such as commercial buildings and hospitals, where the transformer operates at low load for extended periods. 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. Partial discharge is typically below 10 pC. The transformer is maintenance-free and suitable for indoor installation, including basements, tunnels, and other enclosed spaces.

Low Noise & Strong Short-Circuit Withstand

Optimized core and winding design delivers low noise operation, suitable for hospitals, schools, and other noise-sensitive locations. The transformer maintains stable operation under continuous load with strong short-circuit withstand capability and 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

20kV Dry-Type Amorphous Alloy Distribution Transformer Series – Full Specifications

20kV, 3-phase, 2-winding, dry-type, amorphous alloy core, off-circuit tap-changer, distribution transformer, 50-2500kV
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 (%)
SCBH15-50/20	50	20，22，24	±5%	0.4	Dyn11	0.110	1.160	1.230	1.310	6
SCBH17-50/20	50	20，22，24	±5%	0.4	Dyn11	0.099	1.102	1.169	1.245	6
SCBH19-50/20	50	20，22，24	±5%	0.4	Dyn11	0.099	1.044	1.107	1.179	6
SCBH15-100/20	100	20，22，24	±5%	0.4	Dyn11	0.170	1.870	1.990	2.130	6
SCBH17-100/20	100	20，22，24	±5%	0.4	Dyn11	0.153	1.777	1.891	2.024	6
SCBH19-100/20	100	20，22，24	±5%	0.4	Dyn11	0.153	1.683	1.791	1.917	6
SCBH15-160/20	160	20，22，24	±5%	0.4	Dyn11	0.210	2.330	2.470	2.640	6
SCBH17-160/20	160	20，22，24	±5%	0.4	Dyn11	0.189	2.214	2.347	2.508	6
SCBH19-160/20	160	20，22，24	±5%	0.4	Dyn11	0.189	2.097	2.223	2.376	6
SCBH15-200/20	200	20，22，24	±5%	0.4	Dyn11	0.230	2.770	2.940	3.140	6
SCBH17-200/20	200	20，22，24	±5%	0.4	Dyn11	0.207	2.632	2.793	2.983	6
SCBH19-200/20	200	20，22，24	±5%	0.4	Dyn11	0.207	2.493	2.646	2.826	6
SCBH15-250/20	250	20，22，24	±5%	0.4	Dyn11	0.260	3.220	3.420	3.660	6
SCBH17-250/20	250	20，22，24	±5%	0.4	Dyn11	0.234	3.059	3.249	3.477	6
SCBH19-250/20	250	20，22，24	±5%	0.4	Dyn11	0.234	2.898	3.078	3.294	6
SCBH15-315/20	315	20，22，24	±5%	0.4	Dyn11	0.300	3.850	4.080	4.360	6
SCBH17-315/20	315	20，22，24	±5%	0.4	Dyn11	0.270	3.658	3.876	4.142	6
SCBH19-315/20	315	20，22，24	±5%	0.4	Dyn11	0.270	3.465	3.672	3.924	6
SCBH15-400/20	400	20，22，24	±5%	0.4	Dyn11	0.360	4.560	4.840	5.180	6
SCBH17-400/20	400	20，22，24	±5%	0.4	Dyn11	0.324	4.332	4.598	4.921	6
SCBH19-400/20	400	20，22，24	±5%	0.4	Dyn11	0.324	4.104	4.356	4.662	6
SCBH15-500/20	500	20，22，24	±5%	0.4	Dyn11	0.410	5.460	5.790	6.190	6
SCBH17-500/20	500	20，22，24	±5%	0.4	Dyn11	0.369	5.187	5.501	5.881	6
SCBH19-500/20	500	20，22，24	±5%	0.4	Dyn11	0.369	4.914	5.211	5.571	6
SCBH15-630/20	630	20，22，24	±5%	0.4	Dyn11	0.480	6.450	6.840	7.320	6
SCBH17-630/20	630	20，22，24	±5%	0.4	Dyn11	0.432	6.128	6.498	6.954	6
SCBH19-630/20	630	20，22，24	±5%	0.4	Dyn11	0.432	5.805	6.156	6.588	6
SCBH15-800/20	800	20，22，24	±5%	0.4	Dyn11	0.550	7.790	8.260	8.840	6
SCBH17-800/20	800	20，22，24	±5%	0.4	Dyn11	0.495	7.401	7.847	8.398	6
SCBH19-800/20	800	20，22，24	±5%	0.4	Dyn11	0.495	7.011	7.434	7.956	6
SCBH15-1000/20	1000	20，22，24	±5%	0.4	Dyn11	0.640	9.220	9.780	10.400	6
SCBH17-1000/20	1000	20，22，24	±5%	0.4	Dyn11	0.576	8.759	9.291	9.880	6
SCBH19-1000/20	1000	20，22，24	±5%	0.4	Dyn11	0.576	8.298	8.802	9.360	6
SCBH15-1250/20	1250	20，22，24	±5%	0.4	Dyn11	0.740	10.800	11.500	12.300	6
SCBH17-1250/20	1250	20，22，24	±5%	0.4	Dyn11	0.666	10.260	10.925	11.685	6
SCBH19-1250/20	1250	20，22，24	±5%	0.4	Dyn11	0.666	9.720	10.350	11.070	6
SCBH15-1600/20	1600	20，22，24	±5%	0.4	Dyn11	0.860	13.000	13.800	14.800	6
SCBH17-1600/20	1600	20，22，24	±5%	0.4	Dyn11	0.774	12.350	13.110	14.060	6
SCBH19-1600/20	1600	20，22，24	±5%	0.4	Dyn11	0.774	11.700	12.420	13.320	6
SCBH15-2000/20	2000	20，22，24	±5%	0.4	Dyn11	1.060	15.400	16.300	17.500	6
SCBH17-2000/20	2000	20，22，24	±5%	0.4	Dyn11	0.954	14.630	15.485	16.625	6
SCBH19-2000/20	2000	20，22，24	±5%	0.4	Dyn11	0.954	13.860	14.670	15.750	6
SCBH15-2500/20	2500	20，22，24	±5%	0.4	Dyn11	1.290	18.200	19.300	20.700	6
SCBH17-2500/20	2500	20，22，24	±5%	0.4	Dyn11	1.161	17.290	18.335	19.665	6
SCBH19-2500/20	2500	20，22，24	±5%	0.4	Dyn11	1.161	16.380	17.370	18.630	6
SCBH15-1600/20	1600	20，22，24	±5%	0.4	Dyn11	0.860	14.300	15.200	16.300	8
SCBH17-1600/20	1600	20，22，24	±5%	0.4	Dyn11	0.774	13.585	14.440	15.485	8
SCBH19-1600/20	1600	20，22，24	±5%	0.4	Dyn11	0.774	12.870	13.680	14.670	8
SCBH15-2000/20	2000	20，22，24	±5%	0.4	Dyn11	1.060	16.800	17.800	19.100	8
SCBH17-2000/20	2000	20，22，24	±5%	0.4	Dyn11	0.954	15.960	16.910	18.145	8
SCBH19-2000/20	2000	20，22，24	±5%	0.4	Dyn11	0.954	15.120	16.020	17.190	8
SCBH15-2500/20	2500	20，22，24	±5%	0.4	Dyn11	1.290	20.000	21.200	22.700	8
SCBH17-2500/20	2500	20，22，24	±5%	0.4	Dyn11	1.161	19.000	20.140	21.565	8
SCBH19-2500/20	2500	20，22，24	±5%	0.4	Dyn11	1.161	18.000	19.080	20.430	8
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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SCBH17-500/20 Three-Phase Two-Winding Dry-Type Off-Circuit Tap-Changer Distribution Transformer

20kV Dry-Type Amorphous Alloy Distribution Transformer Series

SCBH17-500/20 Three-Phase Two-Winding Dry-Type Off-Circuit Tap-Changer Distribution Transformer