The box-type transformer is divided into three parts: the high-voltage chamber, the low-voltage chamber, and the transformer. It can be arranged in a 'Eye' shape or a 'Product' shape.

The interior and exterior surfaces of the box are smooth, free of rust, coating peeling, and impact damage. The coating layer is firm and uniform, without noticeable contrast or reflection.

The base of the box and all exposed metal parts are treated for corrosion and rust protection and coated with a durable protective layer.

The top cover of the box is equipped with a rainproof sealing plate and square eaves; the double-layer structure of the top cover can prevent thermal radiation.

The design dimensions of the transformer doors match the dimensions of the installed equipment. The doors use internal hinges, and all doors on the box open outward, with an opening angle of more than 90°.

The box is made of stainless steel plates, and the paint is imported automotive paint, all applied using a baking finish method. It is smoke-proof, moisture- and heat-resistant, mold-resistant, and has strong outdoor weather resistance.

• Fully insulated sectionalized combined transformer: The 12kV and 40.5kV outgoing lines use fully insulated cable prefabricated joints and touchable plug-in arrester, with no exposed high-voltage live parts, offering high protection level and reliable safety;
• Fully insulated sectionalized combined transformer: The transformer and high-voltage components are placed in two mutually independent enclosures. This not only solves the problem of oil contamination of the transformer but also allows separate maintenance of the high-voltage components and the transformer;
• The 12kV product uses plug-in fuses with backup protection fuses; the 40.5kV product uses plug-in full-range protection fuses;
• No leakage: each enclosure undergoes a 50kPa/12-hour sealing test to ensure the oil tank is sealed and leak-free;
• High-voltage dry-type bushing outgoing lines combined transformer in a common enclosure; easy wiring, allowing more incoming and outgoing line circuits for the high voltage, and at a relatively low cost;

(kVA)Rated Capacity (kVA)	Voltage combination				Link Group Label	No-load loss (W)	Load Loss (W)	No-load Current (%)	Short-circuit impedance %
	High voltage kV	Low-voltage kV	Tap range
630	35 36 36.75 37 38.5	0.4 0.5 0.54 0.6 0.63 0.69 0.8 0.95 1.14	±2×2.5%		Dy11 Photovoltaic Yd11 Photovoltaic	830	7860	0.65	6.5
800						980	9400	0.65
1000						1150	11500	0.65
1250						1400	13900	0.60
1600					1690	16600	0.60
2000					Dyn11 Wind power	1990	19700	0.55
2200						2145	21080	0.55
2500					Dy11y11 Wind power	2360	23200	0.55
2750						2535	25000	0.55
2800					Yd11d11 Photovoltaic	2570	25260	0.55
2900						2650	26000	0.55
3150						2810	28800	0.55
3300					2910	29825	0.50
3400						2976	30500	0.50	7.0
3500						3041	31170	0.50
3600						3106	31835	0.50