PO Box 370 Phone: Swansea NSW 2281 Fax: AUSTRALIA Mobile: Web:

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1 EZI-DRY Pty Limited ABN: PO Box 370 Phone: Swansea NSW 2281 Fax: AUSTRALIA Mobile: Web: INSTRUCTION MANUAL Silica Gel Disposable Breathers Part #: TMS-1, TMS-2, 6

2 WARNING The EZI-DRY Silica Gel breathers are designed to be installed on electrical transformers. This work environment is hazardous and correct safety procedures should be in place and adhered to before attempting to install or remove these breathers. These instructions should be read in conjunction with any local safety regulations and work procedures. These instructions are only to be used for the correct installation, dismantling and assembly of the EZI-DRY breather. The silica gel in these breathers requires specific personal protective equipment to be used when dismantling and handling the contents. Consult the appropriate MSDS before dismantling. EZI-DRY Pty Ltd can recoend a suitable breather size for the required oil content but the purchaser should make their own determination for correct sizing. The use of these breathers outside these instruction guidelines may cause injury to personnel and/or damage to the equipment it is attached too. Please consult EZI-DRY Pty Ltd if these breathers are to be used in a manner outside these guidelines. 1

3 TABLE OF CONTENTS WARNING... 1 INSTALLING and REMOVAL INSTRUCTIONS... 3 Installing... 3 Removal... 3 DISMANTLING and ASSEMBLY... 4 SPECIFICATIONS... 6 Table 1. Disposable Breather Specifications... 6 Table 2. Adaptor... 7 DESIGN INFORMATION... 7 Table 3. Air Flow Pressure Tests... 7 SIZING

4 INSTALLING AND REMOVAL INSTRUCTIONS CAUTION. These units are designed to mount onto electrical transformers. Dangerous voltages may be present in the vicinity of the mounting point. Ensure all local safety procedures and statutory regulations are carried out, prior to mounting and/or removal of breather and parts. These instructions are suitable for all of these models, TMS-1, TMS-2 1KG disposable units. Both models are the same, the TMS-1 part number is for the combined adaptor (TMS001) and the disposable 1KG bottle (TMS-2) There are two separation discs in unit. The breathers have been designed to mount into the adaptor (quick connect fitting Picture 1 & 2 Part # TMS001)) which is initially supplied with each unit when ordering a TMS-1. The adaptor may be manufactured from acetyl plastic (standard on all units) or stainless steel depending on requirements. These fittings are manufactured to fit a ¾ BSP breather pipe. (1 BSP are available) The adaptor should be fitted onto the correct breather pipe on the transformer. Thread tape or sealer may be required to ensure no leakage occurs. Tighten adaptor until it is seated (approx 16 onto thread) Do not over tighten as this may damage the adaptor. Picture 1 Acetyl Adaptor Picture 2 Stainless Steel Adaptor Installing The breather unit is now ready to mount. The adaptor has a seating washer inside for correct sealing. Screw the breather into the adaptor and rotate anti-clockwise approx 1 ¼ turns until you can feel the breather male fitting meet the sealing washer. The breather is now installed. No further installation procedures are required. Removal The removal of the breather only requires the clockwise rotation of the breather in the adaptor. When removing, be sure to hold the weight of the breather by placing a hand under the base when rotating clockwise to ensure the secure removal without dropping. 3

5 DISMANTLING AND ASSEMBLY Dismantling The 1kg bottle (Part # TMS-2) is not rebuildable and is designed to be disposed into land fill or where the local regulations allow for it to be disposed. The breather has a small filter installed into the neck of the breather to prevent contact with the contents. It prevents the likely hood of any dust particles escaping from the unit and Personal Protective Equipment is not required when handling in the sealed state. If the unit was to be dismantled, personnel should wear the appropriate Personal Protective Equipment as stated in the Material Safety Data Sheet (MSDS) for the silica gel contents ( Mask, eye protection and gloves) 4

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7 SPECIFICATIONS Table 1. Disposable Breather Specifications Part # Silica Gel Content kg A B C Separators D # Separator Spacing TMS The bottle is manufactured from PET ( Polyethylene Terephthalate) and the other parts are ABS plastic ( Acrylonitrile-Butadiene-Styrene) which can be recycled if required or can be disposed in landfill. 6

8 SPECIFICATIONS Table 2. Adaptor Part # A B TMS ¾ Thread Size C inch DESIGN INFORMATION These disposable breathers have been designed with a reed valve system in place of the typical oil bath system. The reeds are designed to operate under normal air flow conditions generated by the expansion and contraction of the transformer oil within the transformer. Typical operation of the reed valve is <2 kpa. Each breather is pressurised to 10 kpa and tested for leakage prior to dispatch. (See Table 1 for typical airflow and pressure) TABLE 3. AIR FLOW PRESSURE TESTS Product Flow Rate Pressure ID L/min kpa TMS-10 TMS-15 TMS-20 TMS <1 50 <3 20 < <3 20 <2 50 <4 20 <2 50 <5 These test results may not be indicative of the breather that is purchased as settling of the silica gel in transport can cause further compaction which may alter these results. This testing was carried out in a workshop environment with a Key Instruments Flow meter & pressure gauge at 21 C. 7

9 SIZING There is no standard for the selection of silica gel quantity to oil quantity. Most manufacturers use approximately 1kg /3000 litres of oil. The design of the EZI-DRY breathers and in field testing combined with evidence has shown that the size of the EZI-DRY breather (silica gel quantity) can be reduced by up to 50% when compared to the standard oil bath breather with the same silica gel quantity. There are many factors which can affect the size selection for a transformer, some being: Maintenance inspection intervals. Local environmental conditions.(temperature range, rainfall, humidity) Transformer loading characteristics (oil temperature range/duration). Oil content (in relation to expansion and contraction quantities with temperature changes). When selecting the Silica gel breather size for your transformer, all of these factors should be considered and combined with any other relevant site conditions. EZI-DRY Pty Ltd can suggest a particular size breather, but the purchaser and installer must take the responsibility for correctly sizing the breather. 8