Search results for query: *

Tripping is the result of undervoltage. I guess. Any other reasons to foresee?

Yes, it is the motor current what I read on ABB display. So,it is possible that load on the motor could be bigger and that leads to overcurrent, as the PLC Quantum tries to keep the flow constant as more and more valves are opening. Correct? Maybe is like I power a normal motor to 60Hz power...

Hi, I am involved with cooling industry and I saw something that I cannot understand: - one water pump motor, 480V,60Hz, 265kW, 383A, cos 0,87, T=50 degrees. - one frequency drive ABB ACS550-02-486A-4 What I do not understand is that: at 81,6%load current is 393A, at around 50Hz. That means more...

To make it more difficult :generator breaker have nominal 250A setting but STR22GE settings are: Io=0.63*In Ir=0.98*Io=154.4A Im(Isd)=3*Ir Iinst=11*In So real setting of the breaker is 154.4A

To be more explicit: I am young designer for electric installation for tugs (asd, stan tugs) with lenght below 50 meters. The main breaker is the generator breaker (NS250N with STR22GE). The 40A automatic fuse is a group fuse neccesary because of limited space in the main switchboard (it is a...

Hy, I am involved in a project which requires plan approval for electric diagrams. I am using cascade low voltage distribution which contains Merlin Gerin NS250N, C60N-C40 and C60N-C10. I am received the following comment: "outstanding point selectivity c32- c10 selectivity is till 240A. and...

Making a discharge test is out of discussion. Lloyd's will never accept that kind of test made by me. I will try to contact a battery manufacturer but I thing I will get no aswer due to the fact that the batteries are yard delivery.

Hy. I am involved in electric design for naval industry. For Lloyd's Register of Shipping I have to show discharge courbes for a specific curent in a determined time. I have searched the net but I cannot find anything. For example I have I=60A, U=24VDC, t=6h. The voltage must not drop below 88%...

I have try it. With mtext I can write text from right to left. But as I don't know arabic language, I can only copy and paste from Excel. And the same problem. Text is displayed reversed. ???

Hy. I have a problem with arabic text in Autocad LT 2000. I am trying to copy text from Excel into Autocad and it seems that is written from left to right. I need it to appear from right to left. I have tryied different types of arabic fonts but no solution. Can somebody help me?

Thank a lot for your answers. It's all clear now. The contactors price is not a problem for the moment and I will keep in mind your advises.

For Mercedes Benz Sprinter 316 cdi: 1. Max. working pressure: 120KPa 2. Min. working pressure: around 30KPa, about 800 rev/s This is all I can help.

As i know, testing common-rail injectors is done with diagnosis computer, which indicates values between -5...5 mg/cycle. I might be wrong about mg/cycle, don't know exactly. The meaning of the values are: if is below 0 means that engine computer is trying to reduce fuel injection on that...

What means partwinding 50/50% start on an electric engine? I receive an electric diagram for one electric-driven A/C compressor, i need to insert a soft-starter ATS48D47Q Telemecanique and I don't know what partwinding is.

For a turbine to make boost pressure it is necessary a flow of exhaust gases to pass through it. It is the only way that the exhaust gases on a turbine-equipped engine can go out. So, exhaust gases goes out and the turbine rotates. If it rotates then it generates pressure in the intake manifold...