Search results for query: *

Hi. I have a problem with one of these ABB alternator protection units. I am looking for a web site where I may be able to find technical information or a troubleshooting guide. I have googled ABB SYNPOL D but I am not finding any down loadable technical information. I am wondering if any of...

The electrical system you are describing sounds like what we refer to as a hull return system. The generators would be connected in a Y or star pattern and the neutral point would be connected to the ships hull. The phase to phase voltage would be as you state 415V. The phase to hull voltage...

There is a thermostat which is used on dairy farms to control the barn ventilation fans. These controllers are used to control the motor speed of a single phase exhaust fan motors based on the ambient temperature verses the desired temperature. I can not give you the manufacturers URL right now...

Hello Mechd07 Why not contact the manufacturer and ask them what would happen if you were to supply an overfrequency to their SSR.

Bigdog As and example, if you were to look inside a residential clothes dryer. The electrical code requires you to install a 30 amp circuit breaker in your electrical panel and to use a 3 conductor # 10 awg cable to bring the power to the dryer. Once the power is delivered inside the dryer it...

hi bigdog what exactly is your electrical engineer saying that you do not agree with?

Is there a down side to going with the larger motor and vsd such as cost, availability or installation concerns? If not why take a chance on the smaller motor?

I agree with waross, some consideration should be given to the ventilation requirements of the motor. If air flow is restricted the motor will most likly over heat. Also, depending where you live or where this unit will be used, there may be some electrical code requirements which need to be...

Hello insideman what is your voltage supply? 230, 460 etc.

Hello sed2developer There is a ground detection system attached to each buss bar at the main switchboard. The ship's electrical system is 3 phase delta with no grounded conductors. The ground detection is accomplished by putting 3 pilot lights in series and a normally closed push button between...

Thanks for all the replies. Jraef do you have an opinion on which manufacturers drive would be more suitable for this application and why?

Hi guys The motor starter does have contactors. The Original timers were changed to Omron timers, the romote control switches are now Allen Bradley. These modifications, as well as others have been carried out on as needed basis. One of the problems which we have now is that the contactors will...

Hi Guys I have a 1960s 15 hp 230 volt 3 ph wound rotor motor. It is presently connected to a motor starter and resistor bank. The motor is reversable and can be operated at either of three speeds selected by remote control switches. This motor is the power unit which operates a capstan on the...

I am not aware of any actual code requirement where you have to use a specific type of cable splice for motor lead to supply line connections. I do not like to use wire nuts, but if I have to because of motor location or space restrictions etc. I always tape them. I prefer to use split bolt and...

mercurous I agree with dcp, it smoked and DaveKillens power bars and GFIC circuit breakers do not seem to work well together. As the guys pointed out the surge protector internal circuitry tricks the GFIC circuit breaker into thinking that a ground fault has occured and it trips off. You may not...

Hi Barry 1492 You will have a hard time finding 17 gauge wire here in North America, I have never heard of such a size in AWG. I was wondering how close you could get to 17 gauge if you were to try a metric wire size from Europe.

Hi stuuk78 What type of fuses are you using? When a transformer initally powers up there is an inrush current which could be blowing your fuse, if they are of the fast acting type. You should try some time delay or slow blow fuses.

hi jbartos I tried to get some information from the thomas register site but did not have much sucess. Do you have any other suggestions? Thanks

Hi I need to replace a 300 hp 60 hz 440 vac wound rotor motor. Does anybody know where i may find a supplier who has used or reconditioned wound rotor motors? Preferably a canadian or usa source. Thanks

gigahertz No, there are no vfac drives. This ship is about 20 years old and was built before solid state ac control devices became popular. electricpete There were more than 20 motor starters affected simultaneously. Only the control transformers were damaged. No contactor coils had to be...