315 KVA 3.3KV To 400V VPI Open Winding Dry Type Transformer To South Africa

Project Background

South Africa’s industrial sector, particularly in mining and manufacturing, has seen a surge in demand for reliable and efficient electrical equipment to support continuous operations. Given the extreme weather conditions and the high energy demand, mining companies and industrial plants require transformers that are not only energy-efficient but also resilient enough to operate in harsh environments. For a mining project located in a remote area of South Africa, the choice was made to install a 315 KVA 3.3KV to 400V VPI Open Winding Dry-Type Transformer to meet the power needs of critical equipment while ensuring safety and longevity.

Performance Results

• Stable Power Supply: The transformer operated without issue for several months after installation, providing uninterrupted power to the mining equipment. The step-down voltage functioned as expected, with the transformer ensuring a reliable power supply to motors, pumps, and other critical systems.
• Reduced Energy Losses: The VPI insulation system and efficient design helped minimize energy losses, contributing to the overall reduction in the plant’s energy costs. The mining company reported significant savings on electricity bills due to the improved energy efficiency of the transformer.
• Enhanced Safety: As a dry-type transformer, the VPI Open Winding transformer eliminated the risks associated with oil-filled units, significantly improving safety. It also reduced the likelihood of contamination or fire hazards, which is crucial in a mining environment where such risks can lead to catastrophic consequences.
• Low Maintenance: The transformer’s robust construction, coupled with its low maintenance needs, reduced downtime and maintenance costs. The dry-type design meant there was no need for regular oil checks or replacements, lowering the long-term operational costs.

Product Introduction

We delivered two units of 315 KVA vacuum pressure impregnated (VPI) dry type transformer to South Africa in 2018. The rated power of the transformer is 315 KVA. the primary voltage of the transformer is 3.3 KV and secondary voltage is 0.4 KV, the transformer coils are vacuum pressure impregnated in high temperature polyester vanish under vacuum and pressure, the coils can be made of copper or aluminum, the insulation is made of high grade nonflammable materials, the insulations class can be F(155℃), H(180℃）or C(220℃) class, suitable for different requirements, the finished coils are effectively protected against moisture, dirt, and most industrial contaminants, VPI transformers are suitable for use indoors or outdoors, any place require particular attention to the environments, such as costal and mining area, it can equipped with cooling fans and temperature controller to allow it have overload capacity. It’s maintenance free to save your valuable time and compact in size to save your limited space.

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

315 KVA Dry Type Transformer specifications and data sheet

General arrangement drawing

Finished 315 KVA 3.3/0.4KV Transformer