The R Series Transformer Breathers that, we here at Protection Experts Australia offer, are manufactured from UV stabilised poly-carbonate and are available in three different sizes. The clear polycarbonate body allows for clear visibility of the desiccant charge and enables users to check desiccant condition with ease. The unit is mounted from a ¾” female pipe thread connection at the top of the breather. This connection point is also used for filling and emptying the desiccant within the breather. Two-way, low pressure valves are fitted in the base of the breather to ensure that the atmospheric air enters the desiccant when a negative pressure differential occurs within the equipment being protected.
The following data should be used for the basic selection of a transformer breather. In order to assess the size of the breather, the air volume above the oil in the conservator tank is the most important factor to consider. The quantity of oil and the transformer rating is of secondary importance. The daily breathing rate is based on the assumption that there are two temperature drops of 8°C per 24 hours. The breathing volume change which occurs during the pump start-up is not taken into consideration.