SG(B)13 & SC(B)13 Dry‑Type Distribution Transformers

Features:
✅Dual construction versions: SG(B)13 open H‑class type / SC(B)13 epoxy vacuum cast type
✅Premium grain‑oriented silicon‑steel core, lower loss vs level‑12 series
✅Excellent short‑circuit withstand performance & high mechanical strength
✅H‑class insulation, thermal resistance up to 180℃, long service lifespan
✅Low partial discharge, stable & reliable continuous operation
✅ Copper winding as standard, aluminum winding optional
✅Intelligent winding temperature monitoring system, auto fan control, alarm & trip protection
✅ Forced‑air cooling supports short‑term overload operation
✅Good moisture resistance, suitable for high‑humidity harsh indoor environment
✅ Fire‑resistant, explosion‑safe, pollution‑free, maintenance‑free
✅Compact footprint, light‑weight, lower installation expense
✅Optional off‑circuit tap‑changer, stainless steel hardware & enclosure
✅ Capacity: 30kVA‑2500kVA, voltage up to 24kV; IEC compliant

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Meaning of Model Number：

Meaning of Model Number

G/C

(B)

□

Three-phase

G: Non-encapsulated type

(Class H)
C: Epoxy resin cast type

Low voltage foil wound coils can be used

Performance level code

Rated capacity kVA

Voltage class kV

Product features:

1. Two structural options adapting different site conditions
SG(B)13 open‑type H‑class design realizes excellent heat dissipation for well‑ventilated space. SC(B)13 vacuum epoxy cast winding delivers high mechanical robustness, dust‑resistance and moisture‑resistance for demanding indoor environment. Loss performance is improved versus level‑12 series for lower operating cost.
2. High mechanical strength & superior short‑circuit withstand capacity
Optimized winding structure together with premium silicon‑steel core enhances anti‑short‑circuit performance, effectively resist mechanical impact under fault conditions and extend service life. Low partial discharge ensures stable long‑time running.
3. Complete intelligent thermal protection system
Multi‑channel winding temperature detector matches dedicated controller. It cyclically displays real‑time temperature of three‑phase windings, automatically switches cooling fans, triggers overtemperature alarm and tripping signal to protect transformer safety.
4. Overload capacity & wide environmental adaptability
With forced‑air cooling, short‑term overload operation is achievable. Good moisture‑resistant property guarantees stable running in high‑humidity environment. Working ambient temperature:‑25 ℃ ~ 45 ℃.
5. Safe, eco‑friendly and maintenance‑free
Oil‑free structure eliminates fire risk and oil leakage hazard. Pollution‑free, fire‑resistant and explosion‑proof, requiring almost no routine maintenance, ideal for indoor substations with strict fire‑protection rules.
6. Flexible configurable options
Copper windings standard; aluminum windings available. Support off‑circuit tap‑changer, anti‑condensation heater and stainless steel enclosure. Compact dimension saves installation footprint and project cost.

Main performance parameters of SC(B)13 dry-type transformer series：

Model	Rated capacity （kVA）	Vector group	Voltage combination（kV）			No-load loss （W）	Load loss（W）120℃ （F）	No-load current （%）	Impedance voltage （%）
Model	Rated capacity （kVA）	Vector group	High voltage	Tapping range	Low voltage	No-load loss （W）	Load loss（W）120℃ （F）	No-load current （%）	Impedance voltage （%）
SC(B)13-30	30	Yyn0或Dyn11	10 6.3 6	±5% ±2x2.5%或 3x2.5%/-1x2.5%	0.4	135	640	2	4
SC(B)13-50	50					195	900	2
SC(B)13-80	80					265	1240	1.5
SC(B)13-100	100					290	1410	1.5
SC(B)13-125	125					340	1660	1.3
SC(B)13-160	160					385	1910	1.3
SC(B)13-200	200					445	2270	1.1
SC(B)13-250	250					515	2480	1.1
SC(B)13-315	315					635	3120	1
SC(B)13-400	400					705	3590	1
SC(B)13-500	500					835	4390	1
SC(B)13-630	630					965	5290	0.85
SC(B)13-630	630					935	5360	0.85	6
SC(B)13-800	800					1090	6260	0.85
SC(B)13-1000	1000					1270	7310	0.85
SC(B)13-1250	1250					1500	8720	0.85
SC(B)13-1600	1600					1760	10500	0.85
SC(B)13-2000	2000					2190	13000	0.7
SC(B)13-2500	2500					2590	15400	0.7

Main Overview:

SG(B)13 and SC(B)13 are level‑13 high‑efficiency dry‑type transformers with reduced no‑load & load losses compared with level‑12 series.
‑ SG(B)13: Open non‑encapsulated H‑class insulation structure, outstanding heat dissipation, cost‑effective choice for well‑ventilated indoor sites.
‑ SC(B)13: Epoxy resin vacuum cast winding, superior mechanical strength, dust‑proof and moisture‑proof performance, fit for dusty or high‑humidity indoor working conditions.

Both series adopt high‑grade silicon‑steel core, featuring strong short‑circuit withstand capability, low noise and remarkable energy‑saving effect. Equipped with complete intelligent temperature controller: cyclic three‑phase winding temperature display, automatic cooling fan start‑stop, overtemperature alarm and tripping function. Forced‑air cooling enables temporary overload operation. Fire‑safe, oil‑free and maintenance‑free. Capacity:30‑2500 kVA, max voltage 24 kV.

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