Products

Electrical & Grid

Transformers

Dry Type Electrical Transformers

Brand: WISHPOWER
Standard: GB/T10228-1997、GB6450-1986、IEC726
High Voltage: 35,10(10.5,6.3,6)kV
Low Voltage: 0.4kV
Vector Group: Yyn0, Dyn11
Insulation Level: LI75AC35/AC3 LI170AC70/AC3

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DESCRIPTION

Specification

Rated Capacity(kVA)	Voltage combination			Connection symbol	No-load Loss(kW)	Load Loss(W)			No-load Current(%)	Short-circuit Impedance(%)
Rated Capacity(kVA)	High Voltage/HV(kV)	Tapping Range of HV	Low Voltage/LV(kV)	Connection symbol	No-load Loss(kW)	B(100℃)	F(120℃)	H(145℃)	No-load Current(%)	Short-circuit Impedance(%)
2000	35-38.5	±4*2.5	3.15/6/6.3/10/10.5/11	Dyn11/Yd11	5000	18900	20000	21400	0.9	7
2500					5800	22500	23800	25500	0.9
3150					7000	25300	26800	28700	0.8
4000					8200	30300	32100	34400	0.8
5000					9700	35800	38000	40600	0.7	8
6300					11500	41500	44000	47000	0.7	8
8000					13200	47200	50000	53500	0.6	9
10000					15100	56800	60200	64500	0.6
12500					18300	67000	70000	76000	0.5
16000					22500	77600	82400	88100	0.5
20000					26500	87500	92700	99200	0.4	10

The table above is just one of our product parameters. If you want more information, please get in touch with info@wishpower.net

What are Dry-Type Electrical Transformers?

Air cooling is employed in dry-type electrical transformers instead of liquids instead of. The heat generated in operation is dissipated by natural or forced air circulations in these transformers. Without liquid insulation such as oil present in dry-type transformers, their safety improves in areas containing flammable materials. They present lower ecological benefits since they have no oil leaks and are easier to maintain than their counterparts that contain oil. In many cases, it is found in indoor locations with insufficient airflow like offices or large buildings. A range of styles is available including cast resin or vacuum pressure-impregnated forms that increase their protection against environmental elements such as moisture and dust. This model is optimized for environments with dampness or erosion.

Advantages over oil-filled?

Dry-type substation transformer provides many benefits compared to oil-filled ones during safety and environmental friendliness. Without relying on flammable oil for cooling purposes they are much safer for locations with fire hazards. This lack of oil reduces the risks of spills and makes them better for the environment. Since the lack of oil renders oil testing obsolete maintenance needs decrease significantly. The cast resin and VPI materials resist moisture and dust well in humid and corrosive conditions where aged oil-filled transformers fail. As a result, they usually function quietly and have a small footprint that simplifies their placement in narrow locations such as buildings. The advantages of these features turn dry-type transformers into an excellent selection for areas focusing on safety and minimal maintenance.

Cost Comparison

Since general electric dry-type transformers use distinct materials and process requirements they often have a greater initial investment compared to oil-filled transformers. This greater financial requirement is frequently counterbalanced by reduced costs for installation and care. Due to their design not needing oil containment systems and fire prevention measures dry-type transformers are much easier and less expensive to install in indoor settings.

In high-load situations, oil-filled transformers achieve better efficiency but they necessitate routine oil checks and replacements increasing their long-term costs. Because they contain no oil， dry transformers require minimal maintenance and thus minimize their long-term expenses. Compared to oil-filled transformers that present an initial cost advantage while being efficient in specific instances dry-type transformers present overall financial benefits especially in environments prioritizing safety and low maintenance such as hospitals and schools.

Application

Commercial and office buildings:

Because they have low fire risks and are safer than other options dry-type transformers are mostly utilized in shopping malls.

Industrial facilities:

Due to their strength against tough environments, they are frequently applied in manufacturing locations such as factories and mines.

Hospitals and schools:

The demand for safety and noise in these regions is high and the gentle nature and environmental protection qualify them as perfect choices.

Data centers:

In these environments, they offer consistent and secure power due to the sensitivity of data centers to temperature and their demand for efficient heat removal.

High-rise residential buildings:

In high-rise structures, they are preferable due to their reliance on coolant-free operation and their absence of fire risks.

Subways and transportation facilities:

Due to their resistance to fire and easy maintenance needs dry power transformer is prevalent in settings such as subways and airports.

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