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Dry Type Transformer

TGT dry-type transformers are the premier choice for indoor and high-sensitivity applications where safety and environmental protection are the top priorities. By utilizing air for cooling instead of combustible fluids, these units provide a reliable, zero-leakage solution that eliminates the risk of fire and environmental contamination. Perfectly suited for urban centers, commercial buildings, and sensitive industrial zones, they offer a safe and sustainable alternative to traditional fluid-filled transformers without compromising on performance.

Category: Dry-Type Transformers

Rating kVA:

up to 25MVA

Voltage ratings:

up to 35kV

Complant With Standard:

info@tgtpower.com

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Fan Robust fan design enhances cooling capacity, supporting reliable operation under heavy load conditions.

Iron Core Carefully assembled by skilled technicians to ensure tight stacking, minimal gaps, and superior magnetic performance.

High-voltage coil Optimized winding design and epoxy casting process effectively reduce partial discharge and improve dielectric strength.

Low-voltage coil Vacuum-cast with epoxy resin for excellent flame resistance, moisture protection, and reliable performance in harsh environments.

Product Description

Commodity name: Dry Type Transformer
Rating kVA: up to 25MVA
Voltage ratings: up to 35kV

TGTpower SC(B) series epoxy resin cast dry-type distribution transformers deliver unparalleled fire safety, high environmental adaptability, and maximum structural durability. Engineered specifically for confined space or moisture-prone indoor grids, these eco-friendly assets operate securely without the risk of oil leakages, fluid tracking, or sudden toxic gas release.
Fully compliant with ANSI/IEEE C57.12.01, IEC 60076-11, and UL 5085-1 benchmarks, our dry-type line brings optimized grid load control and silent thermal dissipation to urban green buildings and high-reliability data centers.

Key Features

Maximum Safety

Non-flammable and explosion-proof—ideal for high-occupancy buildings and tunnels.

Eco-Friendly

Zero oil means zero leak risk, protecting your site from environmental hazards.

Indoor Optimized

Compact design and air-cooled efficiency make them perfect for restricted spaces.

Low Maintenance

No fluid testing or replacement required, reducing your long-term operational costs.

Technical Data for 20kV dry type transformer three phase double-winding (NLTC)

Rated Capacity (kVA)	Rated voltage and tapping range			Vector group	No load Current (%)	Impedance voltage (%)	No load Losses (KW)	On load losses (W)
Rated Capacity (kVA)	HV（kV）	Tapping range（%）	LV（kV）	Vector group	No load Current (%)	Impedance voltage (%)	No load Losses (KW)	B (100℃)	F (120℃)	H (145℃)
50	20 22 24	±2×2.5 ±5	±2×2.5 ±5	Yyn0 Dyn11	1.8	6.0	305	1160	1230	1310
100					1.8		485	1870	1990	2130
160					1.4		600	2330	2470	2640
200							655	2770	2940	3140
250							755	3220	3420	3660
315							870	3850	4080	4360
400					1.0		1030	4650	4840	5180
500							1210	5460	5790	6190
630							1370	6450	6840	7320
800							1570	7790	8260	8840
1000					0.80		1860	9220	9780	10400
1250							2140	10800	11500	12300
1600							2510	13000	13800	14800
2000					0.60		2910	15400	16300	17500
2500					0.60		3480	18200	19300	20700

Technical Data for 10kV dry type transformer three phase double-winding (NLTC)

Rated Capacity (kVA)	Rated voltage and tapping range			Vector group	No load Current (%)	Impedance voltage (%)	No load Losses (W)	On load losses (W)
Rated Capacity (kVA)	HV（kV）	Tapping range（%）	LV（kV）	Vector group	No load Current (%)	Impedance voltage (%)	No load Losses (W)	B (100℃)	F (120℃)	H (145℃)
30	6 6.3 6.6 10 10.5 11	±2.5 ±5	6 6.3 6.6 10 10.5 11	Yyn0 Dyn11	2.0	4.0	105	605	640	685
50					2.0		155	845	900	965
80					1.5		210	1160	1240	1330
100							230	1330	1415	1520
125							270	1565	1665	1780
160							310	1800	1915	2050
200		±2×2.5 ±5			1.1		360	2135	2275	2440
250							415	2330	2485	2665
315							510	2945	3125	3355
400							570	3375	3590	3850
500					0.80		670	4130	4390	4705
630							775	4975	5290	5660
630						6.0-8.0	750	5050	5365	5760
800					0.70		875	5895	6265	6715
1000							1020	6885	7315	7885
1250							1205	8190	8720	9335
1600							1415	9945	10555	11320
2000					0.60		1760	12240	13005	14005
2500					0.60		2080	14535	15445	16605

Certification Certificate

Core Advantage Of TGTpower Dry type Transformers

Exceptional Fire & Explosion Safety

The thin-layer epoxy resin cast coils are entirely flame-retardant, self-extinguishing, and explosion-proof, satisfying the most rigid localized fire-protection codes.

Class H DuPont NOMEX® Insulation

Windings can be custom-insulated with genuine Class H (180°C) DuPont NOMEX® matrices, ensuring superb dielectric strength and anti-thermal-shock resilience under aggressive overloading.

Step-Lap Low-Noise Design

Core cutting utilizes precision step-lap progressive joints to smoothly optimize magnetic flux distribution, dampening operational acoustic humming far below standard NEMA indices.

Moisture-Resistant & Dust-Proof Armor

Coils undergo multiple Vacuum Pressure Impregnation (VPI) lacquer cycles, enabling the transformer to re-energize smoothly after long standbys in 100% relative humidity without initial pre-drying.

Packaging

Hermetic Anti-Moisture Barrier Package:

Every dry-type unit is completely enveloped inside an industrial-grade, thick polymeric thermal shrink-wrap layer, incorporating active industrial desiccants to permanently absorb air humidity during oceanic container transport.
Reinforced Shock-Proof Cushion Skids:

The active transformer assembly is secured tightly with heavy-duty tensioning straps onto solid wood skid platforms (fully compliant with ISPM 15 Fumigation-Free standard) to completely absorb maritime structural shaking and transit vibrations.

Isolation Transformer

None