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Sometimes this forum get vicious, kinda like salt and pepper.

I must be missing something here. If there are two DC drive motors (one per wheel I assume) then one of the motors leads could be reversed to get them driving in the same direction?

I should have added this in my first post. The reason I would steer away from mechanical switches is the confusion factor to someone who not as knowedgeable. At work we have two main switch gears that are set up to swap around. There is always confusion when different disconnects have to be...

Assuming that you need speed control of the motors, and they have identical data plates, I do not see a problem as long as the contactors are electricaly interlocked and would even consider mechanicaly interlocked contactors to prevent improper operation. I don't think I would try using only...

The motor should sit on a concrete pad. It should be prevented from any movement and provided a stable base for the machine, in most applications. If this is infesable then a steel frame of one inch steel that is solidly mounted to the floor. From the original description I thought that maybe...

This size of motor is out of my range of experience. The idea seems foolish to me but I thought there must be some justification. If there is a rigid coupling then it does not make any sense to me but someone made the decision for the unorthodox installation and must have had a reason. I am sure...

On the surface this seems a bad idea but maybe the installer, from past experience, needed the motor to have movement during operation.

itsmoked, I had in an earlier post but not in my last post included that it was a screw compressor. I only included my experience because these two machines are similar in many ways even though mine are almost a scale factor of 10 larger in size. With my liquid ammonia cooling injection...

If the motor is wired right then at transition to delta there should not be an appreciable increase of current that you can see with your clamp on ammeter as long as the motor is turning fast enough. My problem with the refrigeration compressor was the motor load when the compressor slide valve...

What no feedback?

I had the same problem on one of my compressors. Main CB tripping at transition. The problem was as Marke said in his post, the motor was not turning fast enough in star at transition. This was a refrigeration motor so I will not go in depth of the cure. I am not real good with CB's but most...

This is something else to look at. Make sure the compressor is unloading at start.

Having beens through the wringer with star/delta starters in the not too distant past, do you have closed or open transition starting? What is your transition time?

What causes more harm to the human body. A 100A 15,000 Volt power supply or errant daughter?

Oops, Vodka goes well. Get some now.

AFab, "Violet gives willingly, get some now." Get some now for gold, silver and no tolerance band. Another one we learned was, "Black beer rots our young guts but vodka goes good."

As a kid we used to check the thickness of the ice on a pond by holding a sledge hammer, bottom down, from about six inches, dropping it and listening to the thud. The lower the tone the thicker the ice.

Here Here, You can lead a horse to water but you cannot make it drink, that is what my grandmother used to say. I am one of the few that uses lock out consistantly, even if the disconnect is only three feet away. We have people putting their hands in all kinds of places that, would appear to a...

I did not submmit my real concern with inside the delta with all six motor taps connected to the bottom of the soft starter with the three straight through conductors hidden from the electrician. I transfered to the electral side of the field from the electronic side 15 years ago after working...

I searched the web and found your soft starter. I have never seen a soft starter designed for "inside the delta" with all of the connections made at the bottom of the soft starter. From looking at the wiring diagram, the installer may not be aware that the motor has half of its windings...