20kV dry-type distribution transformer SC(B)12-NX3 energy efficiency level 3
Capacity(kVA)	Voltage Combination			Vector group	No load loss(W)(W)	Full Load Loss (W)		Short Circuit Impedance (%)
Capacity(kVA)	HV(kV)	H.V. Tapping Range	LV(kV)	Vector group	No load loss(W)(W)	F(120℃)	H(145℃)	Short Circuit Impedance (%)
50	20 22 24	±5%/ ±2×2.5%	0.4	Dyn11 Yyn0	272	1110	1180	6
100					432	1790	1920
160					536	2220	2380
200					584	2650	2830
250					672	3080	3290
315					776	3670	3920
400					920	4360	4660
500					1080	5210	5570
630					1220	6160	6590
800					1400	7430	7960
1000					1660	8800	9360
1250					1900	10400	11100
1600					2230	12400	13300
2000					2590	14700	15800
2500					3100	17400	18600
2000					2590	16000	17200	8
2500					3100	19100	20400	8

* Above specification may be changed to improve performance.

* Transformer of other specification than listed above can be made to order.

Product Overview

Product Type

This equipment is an epoxy resin cast dry-type distribution transformer, featuring air-based insulation and cooling systems. Unlike traditional oil-immersed transformers, its oil-free structure rules out oil leakage hazards entirely—this design upgrade directly elevates operational safety, especially in enclosed spaces.
Model Interpretation

"SC(B)" denotes epoxy resin cast dry-type transformers, where each letter reflects key performance traits: "S" = three-phase operation (for stable power supply), "C" = cast insulation (enhancing durability), "B" = low-voltage foil winding (improving current-carrying capacity). "12" serves as the design serial number, aligned with industry-specific technical norms to ensure consistent quality. "NX3" is a manufacturer-customized suffix, typically tied to structural refinements (e.g., space-saving designs) or scenario-specific tweaks (e.g., humidity adaptation). "Energy Efficiency Class 3" meets the minimum energy efficiency criteria in national distribution transformer standards, delivering balanced power usage for basic needs.
Core Advantages & Application Scenarios

Boasting reliable moisture and dust resistance, it performs well in harsh environments like damp workshops or dusty warehouses—no extra protective enclosures are needed. It’s also suitable for direct installation in indoor distribution rooms, such as those in shopping malls or residential underground garages. Its heat dissipation system is optimized for medium-low load operations, striking a great balance between performance and cost. This makes it a top pick for projects that prioritize basic safety and budget control over high energy efficiency, such as small retail outlets or standard residential community power distribution systems.

Production Process

Factory

Exhibition(Dubai exhibition, US exhibition, Thailand exhibition, Philippines exhibition……)

Export

Target Market

Company Profile

Guanggao Transformer is a professional transformer manufacturer. We produce single-phase, three-phase, dry-type, distribution, and high-voltage transers (110 kV and above). We meet IEEE/ANSI/UL/CSA and IEC standards. Guanggao Transformer has nearly 25 years of transformer export experience. The company has modern laboratory construction, such as high-voltage test hall, within which there is a 3000kV lightning impulsforme testing device, and some advanced testing equipment, such as CA-21 moisture analyzer from Mitsubishi, American Fluke Ti30 infrared image detector, American RM-3WE three dimensional vibration. And it was identified as the national power transformer energy efficiency testing laboratories in 2011.

The company has undertaken the National Olympic Security Power Project, the National 851 project, the whole construction of the Guangzhou Asian Games, Guangzhou BRT and other important security power projects. The products used in the above projects are highly safe and in a reliable operation throughout the country. Also, these products are exported to Myanmar, Madagascar, Malaysia,other countries. Enjoying a good reputation on the electromechanical market, "Guanggao Brand"was identified as Guangdong famous brand, the product was identified as the National Energy Efficiency Star Products and Brand-Name Products in Guangdong Province.If you have transformer needs, please contact us.

Add: No. 15, Yunpu 1st Road, Yunpu Industrial Zone, Huangpu, Guangzhou, Guangdong, China
Tel: (+86)-020-82505003
Email: ggelectric@gz-gg.com

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