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!
- 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!