XPA-10-E

Description

About the Product:

The XPA range are auto-transformers designed to step-up or step-down voltages on three phase supplies.
Designed as voltage adaption transformers they should be considered an extension to the supply, not as isolation, so cannot offer ‘safe working’ low voltages.

This particular range offers 6 voltages, which cover the majority of world supplies and usages. The design is such, when connecting the relevant voltage from the supply, the other terminals will become live with the marked voltages.

The XPA-10-E has ‘taps’ at the following voltages:
200v – 208v – 220v – 380v – 415v – 440v
The unit is rated to 10kVA (10kW at pf 1)

The range is wound as a Star configuration, with neutral. This neutral should always be connected to the mains supply for voltage stability within the transformer.

Further information:

• Transformers should always be installed by a qualified electrician or electrical engineer.
• The XPA range is designed for use anywhere in the world with a 3ph+N connection.
• Manufactured in the UK
• Built to standard BS:EN 60076
• Ideal for use as a UK-US-Japan-World voltage three phase auto-transformer.

For adapting globally sourced machinery to local electrical supplies.

When a simple voltage change is required (such as Japanese 3 phase 200v to European 400v) and Isolation is not required, an auto-transformer can be used. This results in a substantial reduction in weight and cost. Many supplies follow the Tesla/Edison system of a Star 4 wire configuration with the neutral point being grounded at the substation and brought in to the site. The auto-transformer is simply connected to these four points and as such is firmly locked to the supply phases. The most suitable tapping point is then chosen to run the machine.

Energy Saving.

Another application for the auto-transformer is when the supply voltage is at the top end of the tolerance. For example, the UK supply complies with Harmonised European practice at 230v/400v but is usually 415v or even higher. This is because the users at the far end suffer the effects of voltage drop, whereas big users (industry/trade/office) are near a substation. When usage is substantial, a simple auto-transformer to reduce the supply to the nominal value can give useful savings. Lighting can often be run at the lower level, will use less electricity and run at a lower stress which can prolong life of the installation. The running costs of a transformer are negligible.