Product Introduction

The rated power of the dry type transformer is 250 kVA with AN cooling, the primary voltage is 0.48 kV and secondary voltage is 0.415kV with delta star connection.

Cast resin technology provides excellent insulation and environmental protection, this together with the foil winding technology inside the resin offers the ultimate dry type transformer in terms of dielectric performance and short circuit withstand ability and ensures long term reliability for both distribution and special applications. cast resin transformers can be supplied with either aluminum or copper windings together with possibility of class F or class H insulation system, they can be designed to in-door or out-door installation with different enclosures.

We ensure that each one of our delivered units has undergone rigorous full acceptance testing. We provide one-package service from consulting, quoting, manufacturing, installation, commissioning, training to after sale services, our products are now operating in more than 50 counties in the world. We aim to be your most reliable supplier as well as your best partner in business!

Advantages

Fire resistant /Self-extinguishing(F1)

Environmental class(E2) and climatic class (C2)

From IP00-IP56 enclosure with AN, AF, ANAF or AFWF cooling

Maintenance free

Environmental friendly ,＞90% of material recyclable

Temperature control system

Built-in PT100 probes in 3 phase windings to detect the real-time temperature of windings and cycle display them in the digital screen.

Open circuit alarm and fault self-check alarm display and signal output.

3 stages automatically actions while the temperature reached to the set value, 1st stage the cooling fans start automatically, 2nd stage high temperature alarm,3rd stage over temperature trip.

Fans manual/auto control switch, timing start/stop, history data output.

4-20mA current output

RS485 Modbus communication protocol

Environment temperature measurement

Core temperature measurement

Scope of Supply

Product: resin cast dry type transformer

Voltage level: up to 35KV

Rating level: up to 20MVA

The transformer can be designed according to customer’s requirements

Technical Data Sheet

250 kVA Dry Type Transformer specifications and data sheet

250kVA-0.48/0.415kV Transformer Drawing

250 kVA transformer diagram drawing and size.

250kVA-0.48/0.415kV Transformer Winding:

What is the difference between aluminum coils and copper coils?

The coils of the dry type transformers could be made of aluminum or copper, it depends on customer’s requirements, but normally aluminum material is suggested in dry type transformers, differently with oil type transformers, the coils of dry type transformers are casted in epoxy resin, the resin casted windings already have enough mechanical strength to withstand short circuit current, and aluminum have better heat dissipation ability than copper, the most important is that aluminum coil is more economy(the cost of the aluminum dry type transformers are around 60-70% of the copper transformers), but copper windings dry type transformers is more compact in size, it’s a good choice for the customer who have limited installation space.

250kVA-0.48/0.415kV Transformer Enclosure

Finished 250kVA-0.48/0.415kV Transformer

What is the difference between dry type transformer and oil?

Dry-type transformers use air as the cooling medium, while oil-filled transformers use oil instead of air. Some public places do not use oil-filled transformers because they are a big fire hazard and, instead, use dry-type transformers. This is because the liquid being used is flammable.

FAQ

1.      How soon can you delivery the transformer?

It depends on the quantity and capacity of the transformer, normally within one month since the date drawing confirmed by buyer.

2.      How long can you provide the quality warranty?

12 months since the date transformer operated.

3.      What payment method do you accept?

T/T (wire transfer), L/C both accepted.