tag:blogger.com,1999:blog-42276637525335483852024-03-13T16:36:02.185-07:00CURRENT INFOElectrical Engineering |Current Information|Electric Current | Current Info | Ebooks DownloadUnknownnoreply@blogger.comBlogger14125tag:blogger.com,1999:blog-4227663752533548385.post-53863327779997669502010-01-18T19:22:00.000-08:002010-01-18T19:36:28.166-08:0020 Electrical Ebooks Free DownloadToday I was very lucky maybe. At that moment I was confused to find the download link books relating Electricity, I accidentally found a site that provides free services. There are even other books are available on this site. Truly free is not it?<br />In order to maintain and protect the rights, I suggest you to go directly to the site via the link provided at the bottom of this paper.<br /><br />Some of the books offered on this site are:<br /> 1. Electrical Facilities Safety (PDF)<br /> 2. Electronics Tutorials (HTML)<br /> 3. Op Amp Circuit Collection (PDF)<br /> 4. Digital Logic basics (HTML)<br /> 5. 555 timer circuits (HTML)<br /> 6. Handbook of operational amplifier applications (PDF)<br /> 7. Electromagnetic Fields and Energy (free college textbook online) (HTML)<br /> 8. Classical Electromagnetism by Richard Fitzpatrick (HTML)<br /> 9. Directory of Ebooks by Pacontrol.com - 54 ebooks (PDF)<br /> 10. Electrical Science (PDF)<br /> * Electrical Science Volume 1<br /> * Electrical Science Volume 2<br /> * Electrical Science Volume 3<br /> * Electrical Science Volume 4<br /> 11. Lazar's power electronics guide (HTML & PDF)<br /> 12. Electric Motor Controls Tutorials (PDF)<br /> 13. gerbv - A Free / Open Source Gerber Viewer (Software)<br /> 14. PCB - printed circuit board interactive editor for the X11 window system (Software)<br /> 15. Programmable Controllers Theory and Implementation (PDF)<br /> 16. Automating Manufacturing Systems with PLCs (PDF) - 11Mb<br /> 17. More PLC stuffs - Basics, Glossary, Laws (PDF)<br /> 18. Process Control Fundamentals (PDF)<br /> 19. Ebooks from Texas Instruments (Source: SMPS.US)<br /> * Introduction and Basic Magnetics (PDF)<br /> * Magnetic Core Characteristics (PDF)<br /> * Windings data (PDF)<br /> * Power supply transformer design (PDF)<br /> * Inductor and Flyback Transformer Design (PDF)<br /> * For the remaining 7 ebooks (click here and scroll down under "Unitrode seminar handbook magnetics"<br /> 20. Lessons In Electric Circuits (Posted before, but worth re-mentioning) - HTML & PDF<br /> * Volume I - DC<br /> * Volume II - AC<br /> * Volume III - semiconductors<br /> * Volume IV - Digital<br /> * Volume V - Reference<br /> * Volume VI - Experiments<br />----------------------------------------------------------------------------------------<br /><br />Thank you and may be useful.<br /><br /><br />Information from: http://www.getfreeebooks.com/?cat=18Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-83065030403820746402009-12-18T23:58:00.000-08:002009-12-19T00:18:59.492-08:00Selecting automatic with PLC control system.According to you, Brand is the best plc for now?<br />Every individual must have an opinion different about what we put PLC to control a machine to work with automated systems.<br /><br />In this year, many companies that issued their PLC products. Although it was basically all have the same function. Only the difference may be the way of programming, or code, of each brand has its own characteristic symbols. But believe that all it has a purpose and uses the same although different Brand.<br /><br />Probably from every company has different habits in using the device. As an example, in the past where I work, the engine was operating when many use the Brand Omron and Mitsubishi. Although in fact there are also some products from the European machines that use Siemen brands Plc.<br /><br />And what is the difference?<br />Everything is pretty much the same. And it also can function well if the device is in the berries are also good programs. Now you are confused to choose?<br /><br />hehehehe ....<br />No confusion ... because, Products currently has a good and full Quality.<br />You just have to make choices to fit your machine will do. Consideration is that a cheaper price, input and output of the PLC must be in accordance with the needs of the machine. For what if the small-capacity engine, but you buy Plc with a large capacity? would be detrimental in terms of funds or can seem wasteful. <br />But I suggest, to give an empty place at the Output / Input PLC. Because of this if you do, if you are at a certain time to make changes or additions to the engine capacity, then it would be very easy to do.<br /><br />Good luck hopefully SuccessUnknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-18826452959600519172009-07-27T07:19:00.000-07:002009-07-27T07:22:38.308-07:00MAINTENANCE of VACUUM CIRCUIT BREAKERS- Vacuum circuit breakers maintenance should be based on the manufacturer’s instruction , generally at least once a year or every 2,000 operations, whichever occurs first<br />- Breakers should be inspected every time after a severe fault interruption<br />- Remove breaker from its enclosure<br /><br />- Use a clean, dry cloth to remove all dirt and moisture from the surface of vacuum interrupters and all insulating parts<br />- Check the contact erosion by measuring the spring plate over-travel<br />- Modern vacuum interrupter has an indicator or marking to show that the level that the interrupter need to be replaced<br /><br />- Check the condition of vacuum by performing an A.C. high-potential test at 70% of final factory test value for 1 minute. If the test fails, replace a new vacuum interrupter<br />- If no factory test value, use the formula :<br />70% x (2 x rated voltage + 1 Kv) a.c. at power frequency ; or<br />(2 x rated voltage + 1Kv) d.c. if no a.c. test set is available<br /><br />- Check other operating mechanism similary as with ACBs mentioned earlier<br />- Operate the breaker manually and electrically several times to make sure the breaker is operating properlyUnknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-22550180573762793482009-07-27T06:55:00.000-07:002009-07-27T07:04:51.084-07:00MAINTENANCE of AIR CIRCUIT BREAKERS- Ensure the breaker is in the open position<br />- Record the number of operations<br />- Perform general inspection of the breaker and note any unusual signs or problems<br />- Put breaker in test position and use a test coupler to operate breaker electrically<br />- Check the operation of all relays, solenoid switches, charging motor, control switches<br /><br />- Remove breaker from switchgear enclosure<br />- Wipe away carbon or grease deposit and dust from all insulating parts by using clean, dry lint-free cloth and vacuum cleaner<br />- Inspect condition of bushings, finger clamps, arc chutes, operating mechanism<br />- Inspect and test under voltage coils, shunt trip coils etc.<br /><br />- Sand throat area of arc chutes with non-conductive and abrasive paper<br />- Ensure that arc chutes are clear of contamination and have no significant damage on grids or ceramics. Replace the arc chutes if ceramics are broken<br />- Ensure all Brazed, soldered or bolted electrical connections are tight<br /><br />- Inspect the breaker contacts for uneven wear or damage.<br />- Smoothen contacts with a crocus cloth or sand light. Replace badly pitted or damaged contacts.<br />- Grease contacts lightly with an approved contact grease.<br />- Measure contact resistance.<br /><br />- Inspect all moving mechanism to ensure that the cams, rollers, latches, bearings, etc.are in good condition<br />- Replace bearings and worn parts if required<br />- Apply light lubrication with SAE 20 or 30 machine oil on metal moving joints<br />- Check for proper operation function by closing & opening breakers a few times<br /><br />- Oil circuit breakers should be maintained on a periodic basis similar to the ACBs<br />- Clean oil tank, barriers and tank linings to remove carbon deposit<br />- Analyse the dielectric strength of an oil sample. If visible carbon particles are evident in the oil, replace it with new transformer oil (mineral oil) and fill up to the indicated oil level.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-28490426939490116752009-07-27T05:54:00.000-07:002009-07-27T06:05:27.367-07:00CIRCUIT BREAKERS PROTECTIVE RELAY<span style="font-weight:bold;">Components of a Switchgear</span><br />- Circuit Breakers <br />- Fuses & MCBs<br />- Voltage and current transformers <br />- Protective relays <br />- Measuring instruments<br />- Busbars , insulators & other small parts<br />- Metal enclosure<br /><br /><span style="font-weight:bold;">Types of Circuit Breakers </span> <br />- Air Circuit Breakers<br />**Main Incoming & Outgoing ACBs<br />**Moulded case circuit breakers (MCCBs)<br />**Miniature circuit breakers (MCBs)<br />- Oil Circuit Breaker<br />- Vacuum Circuit Breaker<br />- SF6 (Hexafluoride) Circuit Breaker<br /><br /><span style="font-weight:bold;">Ring main distribution system</span><br />- Oil or SF6 RMU <br />- Relative simple and economical<br />- Consist of circuit breaker or fuse taps with load-break isolator on either side<br /><br /><span style="font-weight:bold;">Function of a Circuit Breaker</span><br />- To isolate or connect the equipment or power supply from/to the power source<br />- To ensure the unimpeded flow of current in the network under normal operating conditions<br />- To interrupt the flow of excessive current in a faulty network through the protective relays<br />- Maintenance should be carried out every 2,000 operations or once a year whichever occurs firstUnknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-21660495177515878392009-04-01T05:31:00.000-07:002010-01-19T23:50:47.641-08:00Example Circuit Breaker and Cable SizeIn the Breaker sometimes we forget to specify the size of the cable capacity in accordance with the cable. And the following are some examples of which may be can you make a guide for your work.<br />
<br />
<span style="font-weight:bold;"> <br />
•Circuit Breaker size=6 A >>> •Cable size (mm2)=1,5<br />
<br />
•Circuit Breaker size=10 A >>> •Cable size (mm2)=2,5<br />
<br />
•Circuit Breaker size=15 A >>> •Cable size (mm2)=2,5<br />
<br />
•Circuit Breaker size=20 A >>> •Cable size (mm2)= 4 <br />
<br />
•Circuit Breaker size=30 A >>> •Cable size (mm2)=10<br />
<br />
•Circuit Breaker size=40 A >>> •Cable size (mm2)=16<br />
<br />
•Circuit Breaker size=60 A >>> •Cable size (mm2)=25<br />
<br />
•Circuit Breaker size=75 A >>> •Cable size (mm2)=35<br />
<br />
•Circuit Breaker size=100 A >>> •Cable size (mm2)=35 / 50<br />
<br />
•Circuit Breaker size=125 A >>> •Cable size (mm2)=50<br />
<br />
•Circuit Breaker size=150 A >>> •Cable size (mm2)=70<br />
<br />
•Circuit Breaker size=200 A >>> •Cable size (mm2)=95<br />
<br />
•Circuit Breaker size=300 A >>> •Cable size (mm2)=185<br />
<br />
•Circuit Breaker size=400 A >>> •Cable size (mm2)=185 / 2 x 95<br />
<br />
•Circuit Breaker size=500 A >>> •Cable size (mm2)=300<br />
<br />
•Circuit Breaker size=600 A >>> •Cable size (mm2)=2 x 185<br />
<br />
•Circuit Breaker size=800 A >>> •Cable size (mm2)=2 x 300 OR 630<br />
<br />
•Circuit Breaker size=1000 A >>> •Cable size (mm2)=2 x 400<br />
<br />
•Circuit Breaker size=1200 A >>> •Cable size (mm2)=2 x 500<br />
<br />
•Circuit Breaker size=1600 A >>> •Cable size (mm2)=2 x 630<br />
<br />
•Circuit Breaker size=2000 A >>> •Cable size (mm2)=3 x 630<br />
<br />
•Circuit Breaker size=3000 A >>> •Cable size (mm2)=4 x 630<br />
<br />
</span>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-15223467955681670922009-03-03T03:49:00.000-08:002009-03-03T04:49:05.325-08:00Automation control<span style="font-weight:bold;">Automation Control with PLC System</span><br />Why in the Control Panel series engines we recommend for use in the PLC?<br />I honestly have not correctly understand the real meaning of PLC.<br />But I know that with the PLC that you attach to the Control panel is very easy for a machine and really help you work as carpenters electricity.<br /><br />Try to imagine if you create a series of machines to control the output with 10 units consisting of Motor and Valve and the input unit 10 consisting of a sensor, and also Limit Switch Push button, certainly a lot of cable you must install on the Control panel you.<br />especially if your machine is designed to use automatic and manual systems.<br /><br />Here are some of the benefits (Personal opinion)<br />if you use the machine PLC SYSTEM for your machine:<br /><br />1. Treatment more easily if we compare with the normal system.<br />2. Detection a more rapid and accurate if a problem occurs when.<br />3. If the engine is working the system changes, you will more easily and freely to make changes to your system control panel.<br />4. Cost calculations more easily and accurately.<br />5. Procurement of spare parts which are relatively easier.<br /><br />interested you?<br />many products that have been circulating in the market. Overall good product but also has all the characteristics and also the benefits and weaknesses.<br />But basically all of the products have remained the same. Namely to control a machine with a systematic, easy to control, secure, powerful, and have a high capacity.<br />some product PLC that is quite famous: Mitsubishi, Omron, SiemensUnknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-44388063928112616572009-02-08T03:49:00.000-08:002009-03-01T04:25:31.451-08:00MV CABLE CONSTRUCTION<span style="font-weight:bold;">Medium Voltage Cables ( 2.001 - 35.000V )</span><br />- Majority are constructed as shield construction except those for 5 KV and below.<br />- For underground cable, concentric neutral cable is used.<br />- The concentric neutral cable consist of the conductor, semi conductor insulation, neutral and jacket.<br /><br /><span style="font-weight:bold;">Other Shield Construction of MV Cables</span><br />- Consist of the copper conductor, conductor shield (semi conducting compound), insulation, insulation shield (semi conductor tape), metallic sheath, armour and jacket.<br />- The conductor shield minimizes corona by equalizing the voltage gradients across the air gap between the conductor strands.<br /><br /><span style="font-weight:bold;">The purposes of outer shielding on medium and high voltage cables are to:</span><br />- Prevent damage from corona.<br />- Confine dielectric field to the inside of cables or conductor insulation<br />- Reduce induced voltage<br />- Provide increased safety to personnel.<br /><br /><span style="font-weight:bold;">Cable trench</span><br />- Low voltage and high current.<br />- Lay in the foil formation better than frat formation.<br />- When cable cross will cause high temperature in trench.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-85955723552998068042009-01-16T05:55:00.000-08:002009-02-26T19:02:47.284-08:00REQUIREMENTS OF SWITCH BOARD ROOMThe switch board room drawing shall carry a little block showing name of project, name and address of developer and architect and endorsed by registered Consultant / Contractor responsible for planning, design and supervision of the installation work.<br />Minimum clearance requirements for purpose of safety and effectively operating and adjusting all equipment mounted on the main switch board (MSB) are as follows :-<br /><br />The switch board room shall preferably be provided with an alternative emergency exit door.<br /><br />The door shall be arranged to be opened outwards and shall not obstruct a passageway into which open. All doors shall be fitted with locks to prevent the entry of unauthorized persons, but shall be readily opened from the inside without the use of a key. Sliding door is acceptable.<br /><br />The switch board room shall either be naturally or forced ventilated depending on location. Forced ventilation shall be required if the switch board room is located at basement levels where ducted fresh air and exhaust are to be maintained effectively. The exhaust fan shall be of adequate capacity and shall be controlled by a timer.<br /><br />Trenches, cable trays and cable entry duct/pipes where required for services to and from the switch board room are to be provided <br /><br />To view all Tip and Trick <a href="http://www.ziddu.com/download/3204797/APPENDIXA6DETAILS.rar.html"> Appendix A6</a> <a href="http://www.ziddu.com/download/3204797/APPENDIXA6DETAILS.rar.html">or Requirement switch board Room</a><br /><br />please <a href="http://www.ziddu.com/download/3204797/APPENDIXA6DETAILS.rar.html">Download in Here File Microsoft Power Point 12kb.</a>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-68938315476752193932009-01-03T17:37:00.000-08:002009-01-03T18:36:53.180-08:00Mitsubishi FREQROL - A700<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://1.bp.blogspot.com/_eCruCi9rVoA/SWAbrhm0sMI/AAAAAAAAAAM/VtN01yhSLV8/s1600-h/DSC010045.JPG"><img style="margin: 0pt 10px 10px 0pt; float: left; cursor: pointer; width: 191px; height: 320px;" src="http://1.bp.blogspot.com/_eCruCi9rVoA/SWAbrhm0sMI/AAAAAAAAAAM/VtN01yhSLV8/s320/DSC010045.JPG" alt="" id="BLOGGER_PHOTO_ID_5287256397102493890" border="0" /></a><br />Inverter Mitsubishi FREQROL - A700<br />Model: FR - A740 - 2.2K<br />Best for adjust Motor Slow and hight speed.<br /><br /><br /><br /><br />The capacition 2.2 KW or 3 HP.<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://1.bp.blogspot.com/_eCruCi9rVoA/SWAe_8WTw-I/AAAAAAAAAAU/xZhaXeSRYw4/s1600-h/mitsubishi_inv_f700.jpg"><img style="cursor: pointer; width: 146px; height: 234px;" src="http://1.bp.blogspot.com/_eCruCi9rVoA/SWAe_8WTw-I/AAAAAAAAAAU/xZhaXeSRYw4/s320/mitsubishi_inv_f700.jpg" alt="" id="BLOGGER_PHOTO_ID_5287260046413251554" border="0" /></a><br /><br /><br /><br />Specification:<br /> <br /> Power : 2.2 Kw<br /><br /> Input : 9.9A 3PH AC380 - 480V 50Hz.<br /> 9.9A 3PH AC380 - 480V 60Hz.<br /><br /> Output : 6A 3PH AC380 - 480V Max.<br /> <br /> Adjust Speed : 0.2 - 400 Hz.<br /><br /><a href="http://www.meau.com/functions/dms/getfile.asp?ID=010000000000000001000001266200000"><em></em><em><a href="http://www.meau.com/functions/dms/getfile.asp?ID=010000000000000001000001266200000">Product Manual .PDF (~17.8MB)</a></em></a><br /><br /><img src="file:///C:/DOCUME%7E1/IMAMS%7E1/LOCALS%7E1/Temp/moz-screenshot.jpg" alt="" />Durongkerehttp://www.blogger.com/profile/04604593375649370413noreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-73374488976650366002008-12-29T18:37:00.000-08:002009-02-26T19:00:08.561-08:00Requirements of Outdoor substations Part - 2Floor opening of 760 mm x 760 mm leading to basement where required, are to be provided with an appropriate galvanized chequer cover. Cat ladders are to be provided at floor openings. Details of these must be shown on drawings.<br /><br />Basement where required must be at least 1.8 m clear height and its floor level must be equal to higher than the surrounding final main road level.<br /><br />Basement door (if applicable) shall be fixed with a panic bolt of the approved type.<br />Positions and details of plant and cable duct opening s as shown on drawing are subject to verification on site.<br /><br />Cable trenches, ramps and cable entry ducts are to be supported by pilling where necessary. Cross sectional views must be shown on drawing.<br /><br />Cable trenches of a minimum depth 900 mm and a minimum width of 600 mm are to be provided. The trenches are to be filled with sand.<br /><br />Cable trenches and switch gear floor openings are to be covered with removable galvanized chequer plate each of 8 mm thickness and 300 mm width.<br /><br />All cable trenches and substation basement (if applicable) must be dry and free of water. Water proof sealing compound shall be used.<br /><br />The value of the minimum bending radius of the various types of cables shall be complied with.<br /><br />The schematic layout of the light fittings, power points, etc shall be shown in the drawing.<br /><br />An illumination level of above 400 lux is required. External lighting for substation building shall be controlled by a time switch.<br /> A minimum of 2 numbers of switched power socket putlets each are required for the transformer and switch gear rooms.<br /><br />All substation wiring shall be run in surfaced G.I. conduits.<br />A rubber mat to B.S. 5912/1952 or equivalent, of minimum thickness of 5 mm and width 600 mm shall be provided in front of the switch gear.<br /><br />Fire fighting requirements shall be approved by the Fire Department as well as SESCO are as follow :-<br />A. For up to 1000 kVA capacity, 1 unit each of CO2 fire extinguisher of the approved type is to be provided and mounted in transformer, switch gear and battery room.<br />B. For greater than 1000 kVA capacity, a CO2 gas fire fighting system of adequate capacity with smoke and heat detectors are to be installed in the transformer and switch gear <br /><br />Switch gear room and transformer room must be designed to provide adequate ventilation. Honeycomb walls or p.c. RC louvers, where applicable, are to be used for transformer capacities up to 1000 kVA.<br /><br />For substation above 1000 kVA capacity, a time controlled exhaust fan of adequate capacity is to be installed separately in both transformer and switch gear rooms.<br /><br />Substation name plate and danger sign are to be mounted at the substation door<br /><br />The substations shall be earth filled to a height of at least 300 mm above the final flood level or above the height of the surrounding area.<br /><br />The substation fencing shall be as follows :-<br />(A) Chain link perimeter fencing of 3 m height shall be galvanized to B.S.729 and B.S.443 inclusive of 3 rows of barbed wire at the fence top.<br />(B) The base of the fencing shall be embedded in a concrete kerb of 150 mm depth and 100 mm width.<br />(C) All metal structures which from the fencing shall be separately earthed.<br />(D) An apron of minimum 600 mm shall be provided surrounding the perimeter fence externally.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-17860445850895912802008-12-29T18:12:00.000-08:002009-02-26T19:01:12.620-08:00Requirement for Indoor Substation Part - 1The substations drawing shall carry a title block showing name of project, name and address of developer and architect and endorsed by the registered consultant/contractor responsible for the planning, design and supervision of the installation work.<br /><br />All dimensions and figures shown on plans are to be shown in the metric system and are to be taken as checked by Consultant / Contractor.<br /><br />The substation roof shall be of spandek roofing laid to proper falls and with water-proofing materials. Galvanized iron rainwater pipes from roof are to be brought right down to surrounding drains.<br /><br />All internal walls and columns are to be provided with 20 mm cement plastering, and emulsion-painted. The ceiling shall be made of fire-rated materials of the approved type and is to be emulsion painted as well.<br /><br />All wood work, metal work, etc are to be suitably painted; all woodwork shall be anti-termite treated. The external wall shall be painted with weather shielded paint or equivalent.<br /><br />Door shall be made of aluminium roller / sliding doors and provided with bolting requirements for locks. Minimum dimensions are :<br />Switch gear room = 2700mm x 1800mm W (Nett)<br />Transformer room = 2700mm x 2700mm W (Nett)<br /><br />Hasp and staple (125mm x 50mm x 5mm) shall be of the brass type and door hinges (125mm x 90mm x 3mm) shall be of the stainless steel type.<br /><br />Transformer and switch gear are to be housed in separate rooms with brick walling of at least 225mm thickness.<br /><br />Should there be more than one transformer to be installed, the individual transformers are to be separated by either:<br />A minimum distance of at least 1.5 m or,<br />2.5 m high brick walling of at least 225 mm thickness.<br /><br />The battery room, where required, shall be housed in a separate room; the minimum floor area shall be 2 m x 2 m.Adequate ventilation is to be provided.<br /><br />Substation floor are to be of a 50mm thick cement rendering including a 20mm granolithic smooth finish of one part of cement to one part of granite chipping and one part of sand with an addition of 9 kg of ironite to each 45 kg of cement.<br /><br />Switch gear floors are to take a load of 1.000 kg per square meter.<br /><br />The engineer in-charge shall be notified prior to the final rendering of the substation (wherever applicable)<br /><br />Clearance requirements are from sides and rear of switch gear shall be at least 1.0 meter and front clearance shall be either :-<br />The length of the fully with drawn circuit breaker truck plus an additional minimum length of 1.0 m.<br />A minimum length of 2.0 m.<br /> Clearance from the top edge of the switch gear to the ceiling shall be at least 900 mm or greater.<br /><br />Transformer plinth shall be of a minimum area 1.2 m square and shall be able to take a load of 10 tonnes. Side clearances to wall of 1 m are required around the transformer to be installedUnknownnoreply@blogger.com0tag:blogger.com,1999:blog-4227663752533548385.post-31232349446151940162008-12-29T17:17:00.000-08:002009-02-26T19:00:53.482-08:00General Requirements substations1. The substations must be accessible to authorized personnel and vehicles at all time.<br /><br />2. The proposed access road to the substation entrance shall be built to withstand heavy vehicles with a total weight of about 10 tons.<br /><br />3. The substation and access roads shall be located at least 300 mm above the final flood level of surrounding area.<br /><br />4. Proper drainage around the substation is to be provided.Unknownnoreply@blogger.com1tag:blogger.com,1999:blog-4227663752533548385.post-66665689217676540242008-12-29T09:54:00.001-08:002008-12-29T17:02:14.829-08:00Mitsubishi<p class="mobile-photo"><a href="http://3.bp.blogspot.com/_2fhbkF9Kjmk/SVkOxGi7geI/AAAAAAAAAEY/yzbVYlgDWqs/s1600-h/DSC01005-752388.JPG"><img src="http://3.bp.blogspot.com/_2fhbkF9Kjmk/SVkOxGi7geI/AAAAAAAAAEY/yzbVYlgDWqs/s320/DSC01005-752388.JPG" border="0" alt="" id="BLOGGER_PHOTO_ID_5285271874429485538" /></a></p><br /><br />Model: FR-A740-2.2K<br />Power: 2.2Kw<br />Input: 9.9A 3PH AC380-480V 50HZ - 60HZ<br />Output: GA 3PH 380-480V max<br />0.2 - 400 HzUnknownnoreply@blogger.com0