Transformer Breathers Protection against: ♦ High humidity ♦ Water condensation ♦ Pressure variations ♦ Dielectric loss ♦ Mould growth ♦ Outgassing Innovative Products and Services for the Modern Power Industry

High performance plastic or metal construction Simple installation ISO9001/2008 design approved Suitable for 1250 kVA to 750 mVA Transformers Low dusting beaded ENVIROGEL adsorbent Up to 25% adsorption capacity Definitive colour change saturation indication IP 65 rating Operating temperature range –50°C to +70°C Vandal proof Weather resistant All round visual saturation indicator Size R Transformer Breather Typical Electrical Breakdown in Transformers The insulation value of oil can deteriorate dramatically as it becomes contaminated with water. Water content of oil increases as it is exposed...

TRANSFORMER BREATHERS Rechargeable Transformer Breathers BROWNELL Transformer Breathers provide clear visibility of the ENVIROGEL through a shatter-proof, UV stabilised polycarbonate cylinder or window. Two-way, low pressure valves are fitted in the base of the breather, to ensure that atmospheric air enters the desiccant charge when a negative pressure differential occurs within the transformer being protected. Robust construction Transformer Breathers BROWNELL Transformer Breathers are filled with ENVIROGEL, self-indicating desiccant. The ENVIROGEL is orange in colour when active, turning green...

The top pipe connector (3/4" Female Pipe Thread) is also the filling and emptying point. The beaded, self-indicating ENVIROGEL should be replaced once the colour has changed from orange to green, as indicated on the label attached to the breather. All threads conform to BS21 and IS07-1. Full installation and maintenance instructions are supplied with each BROWNELL Transformer Breather. INWARD * OUTWARD RELIEF VALVES INWARD & OUTWARD RELIEF VALVES BROWNELL LIMITED

TRANSFORMER BREATHERS These Transformer Breathers are connected either by a flange or pipe thread connection. Mounting brackets on the top plate provide additional support for the Transformer Breather. Two-way, low pressure valves are fitted in the base plate of the breather to ensure that the atmospheric air enters the desiccant when a negative pressure differential occurs within the Transformer being protected. Size ‘V, W & X’ Transformer Breather has a 3/4” Female Pipe Thread. Size ‘Y & Z’ has 1” Female Pipe Thread. All threads conform to BS21 and ISO7-1. BROWNELL Transformer Breathers are...

Mark 7 Transformer Breathers Mark 7 Transformer Breathers were introduced to meet the additional robustness necessary for the efficient protection of equipment operating under high mechanical stress. Fabricated from welded mild steel which is phosphate conversion and powder coated. Mark 7 Transformer Breathers will withstand the bump, vibration and shock parameters found in electric traction and similar vehicles. The BROWNELL Mark 7 Transformer Breathers are fitted with oil -seal bowls and are filled with Envirogel desiccant. The only maintenance action required is periodic inspection of the...

Quick Change ENVIROGEL cartridges can be refilled, replaced or reactivated Rapid cartridge replacement No special tools required Minimum downtime and maintenance Ideal for planned maintenance cycles FAQs Q: Can I fit a Transformer Breather, which has a larger ENVIROGEL capacity than my existing Transformer Breather? A: Yes, for example you can use a Size R1 Transformer Breather to replace an R type which will significantly increase the time between ENVIROGEL maintenance. Q: Are there any specific safety considerations when handling Transformer Breathers and ENVIROGEL? A: We recommend when handling...

BROWNELL LIMITED Approximate Transformer Rating (MVA) Max. Air Space Volume (Litres) Information for guidance use only. Data to be used in selection of Transformer Breather Units Approximate Daily Breathing Rate (Litres) Max. Air Volume Before Recharge (Litres) Estimated Effective Cycle Time (Days) TRANSFORMER BREATHERS

ENVIROGEL Reactivation TOGGLE CATCH DESICCANT BASKET CONTROL PANEL Reactivation Unit Model No. BL/E 1005/04 One of the principal reasons for the use of indicating ENVIROGEL is its ability to release adsorbed moisture when heated to a temperature of 95°C. This means it The Reactivation Unit is a purpose designed equipment to do that. It is operated from a standard mains electricity outlet to power (240V 50Hz) the three kilo-watt heaters. A forced air circulation ensures the evaporating moisture is transported from the Precise reactivation management Removable desiccant holder Temperature monitor...

Size Matters Doubling your desiccant life coupled with reduced maintenance DOESN'T MEAN TWICE THE COST! Size R can be replaced Size S can be replaced Size V can be replaced with Size Rl with Size T with Size W BROWNELL LIMITED

TRANSFORMER BREATHERS Tank Vent Dryers for Oil Storage MODEL For the protection of oil stored in bulk containers, BROWNELL offers a range of Tank Vent Dryers with an oil storage capacity of up to 500,000 litres. Tank Vent Dryers provide constant protection against water and humidity contamination of stored oil. Filled with self indicating silica gel Tank Vent Dryers maintain the oil in a dry and safe condition. Maximum Filling or Emptying Rate Maximum Fluid Capacity Related to Desiccant Content Replacement Desiccant Charge Data

TRANSFORMER BREATHERS ENVIROGEL DESICCANT BROWNELL Transformer Breathers are filled with Envirogel Desiccant, which changes colour from orange to green as it becomes saturated with water vapour. Brownell Transformer Breathers are designed to enable the easy and quick replacement of the desiccant charge. When the colour change from orange to green has reached the level showed on the label, charge should be replaced. Now that old type oil-seal has been replaced by inward and outward relief valves, the replacement of the desiccant charge is the only maintenance activity necessary. Brownell supply...