Safety Tips: Caring for Transformers

Many electrical hazards can be prevented by following some easy-to-follow caring tips for transformers. Below are some general electricity safety precautions every transformer manufacturer and end-user should know and follow. Always remember to ask a professional if you’re uncertain about the safety of a high voltage transformer.

This is Part 2 of the series "Safety Tips". Read Part 1 of the series, which discusses many safety tips when working with a transformer.

Handling, transportation and lifting

  • Any transformer with exposed windings is subject to impact and touch. Direct hits to the windings and accessories can cause insulation failure or a short circuit.
  • Use the eye lugs or pallet and pallet truck/forklift lifting. The weight of the transformer is indicated on the rating plate.
  • Keep the shrink wrap plastic packaging on as long as possible during installation.
  • Before connecting the transformer to the electrical system eventually packing has to be removed

Location and airflow

  • Mounted terminal blocks are approved for both copper and aluminum wires.
  • Free space around the transformer must be sufficient to provide natural air cooling to keep the ambient temperature stated on the rating plate.
  • An IP20 certified transformer is designed for an unobstructed airflow from all sides, from bottom to top.
  • Consider airflow and heat when adding/connecting cables.
  • Cool air in from the bottom – Warm air out on top!

Protection: Fuzes

  • Concerning fuse arrangement and size, please follow transformer manufacturers’ recommendations.
  • Fuses should be of slow blow characteristics.
  • The transformer must be protected against overload – maximum current is specified on the transformers rating plate

Storage & preservation

  • A transformer is generally not packed for outdoor storage. Ideally it must be used in dry indoor ventilated conditions in the temperature range of 0-40°C with a maximum relative humidity of not more than 80%.
  • Do not store anything heavy on the transformer.
  • Keep the shrink wrap plastic packaging on during storage.

Installation, operation & maintenance

  • It is recommended to keep the transformer free from humidity, dust, and other materials which may be conductive.
  • Keep the transformer out of the rain and similar conditions unless the transformer is IP rated.
  • Do not use welding equipment, grinders, or similar equipment close to the transformer unless they are shielded by protective wrapping.
  • Do not sit, stand or walk on the transformer itself.
  • Neither store any heavy equipment on top of the transformer nor cover it with any kind of material.

A correctly installed transformer will be a lifetime worth of investment!

Need Custom Magnetics?

We work with you to build a component that fits your need perfectly.

Subscribe Newsletter

Stay up to date with industry news, new product highlights, upcoming exhibitions, webinars and other alerts from Shreejee.

This field is for validation purposes and should be left unchanged.