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tioga

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  1. I would like to add the following websites: http://www.edrawsoft.com http://software.imformer.com tioga-USS hornet
  2. For starters there are two places you can look. Google "Electrical Ladder Diagrams Software". There are many websites that have such software. You can also check Amazon (www.amazon.com) under books and type in "Electrical Ladder Diagrams". Tioga- USS Hornet
  3. What you need is a "cyclic" timer that you can set and program your own schedule. An SSAC (www.ssac.com) timer would be perfect for you application. I use SSAC timers all the time in my control work. And, the timer contact does need to be wired in series with the contactor coil. Before you do anything you must determine the following: 1. If the starter provides "low voltage" protection then you must change the momentary master switches to a maintaining master switch. 2. If the starter provides "low voltage effect" protection then you do nothing. 3. If the starter provides "low voltage release effect" then you must add a 3-pole contactor for the timer to control. Tioga USS Hornet
  4. Try KB Electronics (www.kbelectronics.com). They have an excellent line of AC and DC motor controls and drives.
  5. If you want the motor to turn on and off when you want then you need a cyclic timer which can be set or programmed to your schedule. I suggest an SSAC (www.ssac.com) timer. I use them all the time in my control work. The timer contacts need to be connected in series with the starter contactor coil. If the motor starter provides "low voltage" protection then you must change the momentary master switches with a maintaining master switch. If the motor starter provides ''low voltage release" protection then you don't need to change anything. If the motor starter provides "low voltage release effect" protection then you will have to add a 3-pole contactor with the timer contacts wired in series with the contactor coil. Tioga USS Hornet
  6. The neutral reactances are used to prevent circulating currents in the neutrals of generators operating in parallel. Circulating currents are caused basically by different winding pitches.The best answers you can get is to "Google" "Neutral Reactor". You will find an entire education on neutral reactors with excellent "White Papers". Tioga "USS Hornet"
  7. A compond tansformer used for generator excictation is basically a 3-phase transformer fed off the generator output, rectified and fed into the generators field. This provides excitation but not regulation. A second winding (current winding) carries load current which increases with load. This winding acts as a boost having a "field forcing" effect on the geneator field and provides regulation. Power generating plants in the US used this concept for many years but used a special wound tansformer/magnetic amplifier type that provided full excitaion but was contolled by a static voltage regulator. The US Navy used this version on small destroyers replacing mechanial/electrical and rotary exciers. They proved to provide excellent excitaion and regulation for the time period. They were eventually replaced with solid state systems that provided faster response. Anyway, go to "Google" and type in "Compoound Transformer". You'll be amazed at the info available. Tioga "USS Hornet"
  8. The best way to find this out is go to Google and type in "induction regulator" You will find many website that address this issue in great detail. One of my favorites is www.wikiaedia.com. your answer is out there. Tioga
  9. It sound like you lack sufficient information to accomplish anything. You can contact Basler Electric (www.basler.com). They provide a large range of generator controls including solid state exciters and regulators. They are very expert in these things and I'm sure they will be happy to help. USS Hornet.
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