EDS - EDC. Vacuum Insulating Oil Treatment Plants

Transcription

1 EDS - EDC Vacuum Insulating Oil Treatment Plants

2 EDS - EDC Vacuum Insulating Oil Treatment Plants For more than 0 years, TELSTAR has manufactured and distributed vacuum insulating oil treatment plants all over the world. Our range EDS/EDC, remove the moisture, dissolved gas and solid particles to provide the best insulating properties. Thanks to the experience gained over 200 projects and the continuous R & D process, TELSTAR degassers offer innovative solutions and advanced technology to ensure the highest quality and to fulfill customer satisfaction. The insulating oil In electrical transformers, the three main components sensitive to deterioration and pollution are: The cellulose paper: used for insulating the conductors. The cardboard form: used for main support and insulating the winding. The insulating oil: used as coolant and insulating fluid in electrical transformers. Between these three components, the insulating oil is more accessible for taking samples and, with it, you can obtain valuable information about the operation conditions of the transformer. Insulating oil must ensure the following properties: High dielectric strength. Excellent chemical stability. Low electric losses due to the low value of its tangent delta. Good heat distribution through the proper viscosity. There are several factors contributing to deterioration of insulating oil, such as moisture, overload, overheating and the lack of maintenance. Water content in the paper % C 0 C 40 C 50 C 0 C 80 C 100 C Water content in the oil ppm It is very important to heat the dielectric oil to increase the water content capacity. If the oil temperature is too low, it is far more difficult to extract the moisture inside the cardboard and the paper. Because of this, our EDC plants incorporate an additional feature that only heats and filters the oil in a higher flow than the treatment capacity. News of the Vacuum Treatment Equipment The foaming effect: When the oil temperature is too low, the vacuum pressure too high or the distribution pattern inside the column is not the appropriate, foam begins to raise and can damage the vacuum pump. Our equipment has the AFP (Anti-Foaming Protocol) to eliminate the foam during the degasification under vacuum. TELSTAR's plants offer the following advantages: Suitable designed to transport by forklift. Ability to be carried inside a van thanks to the position of the items and the reduced measures (version EDS / C4). Double inlet and outlet ends. Quick couplings KAMLOK type. LCD touch screen to control the whole plant. Two operating modes: - Automatic: the computer adapts the oil flow and vacuum depending on the properties of the oil. - Manual: where the user can adjust the parameters at will.

3 Design features Vacuum pump: reliable design with big oil carter. The anti suck back valve prevents oil pump from being sucked into the system when it switches off. Electric cabinet: The LCD touchscreen make it easy to operate with the machine: temperature, oil pressure, vacuum, foam level... All could be monitored from the LCD. Oil trap: the internal design prevents vacuum pump sucking oil drops and the level alarm alerts when it must be drained. Oil filter: The two manometers before and after the filters indicates when should be replaced. In addition, with the double option filter it is possible to replace them during operation. Double inlet and outlet ends: To fill with new oil from a tank/barrel or to drain it without unplugging the existing hoses. Just plug the new ones in the second port and regulate it with the valves. Furthermore, the quick link KAMLOK type oversimplifies the operation. Oil pump: the low NPSH and the positive suction head guarantees an optimal prime of the pump and no cavitation. Technical data Type Treatment capacity Capacity during transformer heating process Maximum oil temperature rise at rated capacity Vacuum pump capacity Heating power Total input power Quantity of oil filter cartridges Column dimensions Inlet/Outlet pipes dimensions Total weight Dimensions Units m /h m /h C m /h kw kva mm kg Lenght (mm) Widht (mm) Height (mm) EDS L=1200 Ø=500 DN EDS L=1200 Ø=500 DN EDC L=1200 Ø=500 DN EDC L=1400 Ø=00 DN EDC L=100 Ø=00 DN

4 Diagrams EDS plants TIC V1 5 2 TIC FS PS PIC TS V PS V V4 EDC plants TIC 4 V TIC FS PS TS V PIC 22 V5 20 PS V V V Oil inlet valve Temperature indicator Mesh filter Manometer Flow switch Heat exchanger Safety thermostat Safety valve Temperature regulator/indicator Oil isolation electrovalve Flow rate regulating valve Degassing column 1. Pressure indicator control 14. Airing valve with filter 15. Vacuum isolation electrovalve 1. Oil trap 1. Vacuum gauges 18. Vacuum pump 19. Oil outlet pump 20. Check valve 21. Oil filter 22. Oil outlet valve 2. Max. oil and foam level alarm 24. Sampling valve 25. Vacuum pump safety valve 2. Oil inlet pump 2. Pressure switch 28. Electric cabinet Options and Accesories V1. Transmiter for moisture content V2. Henrymeter V. Roots vacuum blower V4. Double oil filter V5. Flow-through meter V. Auxiliary vacuum pump

5 Main features of EDS/EDC range Our plants perform three main functions: Filtration The presence of solid impurities reduces the oil's dielectric strength and clogs the equipment components. In our machines are two different systems to achieve the manufacturer's requirements: the mesh filter removes larger impurities and then, thanks to special filters for insulating oil, 1, and 5 microns levels are reached. In order not to interrupt the process if it is necessary to change the cartridge, it is possible to install two filters in parallel. In addition, this configuration allows to operate with two filtration levels according to oil's condition. Heating Due to the fact that water's dissolution in insulating oil depends on the temperature, it is important to have oil as hot as possible so that it can absorb the maximum amount of water placed inside the cardboard and paper. With electric heaters and control loop, the heater can increase oil temperature 0 C every cycle. The electrical resistors have a large surface, so that heat transfer is limited to 2 2W/cm. Security against overheating the oil is ensured by four separate devices that control different variables such as: temperature, pressure and flow. It is important no to exceed 80 C, which is the maximum temperature recommended by the main insulating oil producers. Degassing Column The column does the most important process: the degassing under vacuum. To ensure the succeed of process, it incorporates a distributor and a random packing that ensures an optimal spread having the largest area exposed to vacuum. Once oil leaves the packing section, it is collected at the bottom of the column to return back to the transformer thanks to the oil pump. The column features an illuminated observation glass, a control system for liquid level and a control system of foam. Optionally, you can incorporate a Henrymeter. Treated oil characteristics 1 The obtainable oil quality coming out of a Telstar unit is as follows: Water content Gas content Vacuum inside column After one cycle < 10 ppm < 0,5% < 10 mbar In event of adding a roots pump, the obtainable oil quality will be: After three cycles < 5 ppm < 0,2% < 0,8 mbar Water content Gas content Vacuum inside column After one cycle < 5 ppm < 0,2% < 2 mbar 1. Provided that oil does not exceed 50 ppm and 12% gas content at entry. After three cycles < ppm < 0,1% < 0,8 mbar

6 Options and accessories Roots vacuum blower, 1. Transmitter for moisture content in oil (ppm), 2. Dielectric strength tester,. Henrymetrer to measure the residual gas content, 4. Outdoor version: canvas or metal cover, 5 and. Water cooler circuit, : - Cooling jacket for column. - Cooler for electric cabinet. - Steam condenser. Auxiliary vacuum pump (external o incorporated). Double stage column. Auxiliary oil pump. Double oil filter. Auxiliary autotransformer. or 1 microns additional cartridge filters. Mobile version: light tow or trailer. Electronic multichannel recorder. Oil and vacuum hoses kit. Recommended spare parts. Cooler for electric cabinet for tropical climates. Pirani type electronic vacuum gauge. Air dryer system ISO 9001: Certified Company BR-EDS-EDC-EN-0409 Telstar reserves the right to improvements and specification changes without notice. SPAIN Josep Tapiolas, Terrassa (Spain) T F Santibáñez de Béjar, Madrid T F NORTH AMERICA 1504 Grundy's Lane Bristol PA 1900 T +1 (215) F +1 (215) JAPAN Azbil Corporation Tokyo Building, 2-- Marunouchi, Chiyoda-ku, Tokyo , T F CHINA No. 0 Jin Wen Road, Zu Qiao Airport Industrial Park, Pudong District 2012 Shangai T F sales.laboratory@telstar.com