Recent content by sunrays

I need to use a VFD on a crane application with the ambient around 55 Deg. C. I would be using a Panel Cooler, but in the eventuality of the failure of the Panel Cooler for any reason I need to continue to use the crane till the cooler is put back in circuit. The manual for the drive selected...

The equipment is to power an anemometer which works on a 230 V 1 Phase, 50 Hz. supply, but the Rubber Tyre Grantry on which I propose to install supplies a 60 Hz. supply.

I am looking out for a 230 V 1 Ph 60 Hz to 230 V 1 Ph 50 Hz conveter with a current rating of around 5 Amps. My supply source is 60 Hz and the equipment that I need to power is 50 Hz. Can any one suggest a suitable converter. Thanks in advance

I did explore the wireless solution. The two systems are not in line of sight. As per the wireless solution providers non line of sight would mean use of lower band width which and multiple repearters. This adds to the cost and will end up in an unreliable solution with signal loss to compound...

I need to send the speed reference from Drive A to Drive B over a distance of 800 Meters. Application is not very critical from the speed accuracy point of view. A +/- 10 RPM is good enough. Option A: Use a field bus option but length is an issue. I am given to understand that I need to use...

Thank you every one for your time. I guess I have to go for a different design. Will think of flex leads as suggested by Shogsgurra.

I am in the process of retrofitting a 600 Amps Four Quadrant Thyristor Stack. During this process I noticed that I have to increase the spacing between the two halves of the heat sink to accommodate the bus bars which pass at the center of the heat sink. One idea that had come up during...

The Drive Panel as well as the motors are on the moving equipment. Drive to Motor connection is by cables only. The incoming power to the equipment is by means of flexible cables wound / unwound on a reeling drum as the machine moves forward / reverse on rails.

Thanks Controlsdude & itsmoked for your time. Controlsdude: The voltage measurement was more of an inqusitiveness to check the effect of non grounding of drive and motor and was not done to kill some one! The machine is used to stack iron ore in piles along the lenght of the track. The drive...

I intend to connect a 45 kW VFD to 4x7.5kW Motors for Long Travel of a Yard Machine. As per the VFD Manual the Drive output earth terminal has to be connected to the motor earth to ensure perfect grounding. In the present application the motors as well as the VFD panels are installed on metal...

The speed reference was stable. No doubt about that. Secondly the behavior was the same when run from the key pad of the drive also. The drive has a rotating auto-tune that was done successfully with the motor decoupled. This is the advice in the manual. I fine tuned the Current Loop as wells...

I was commissioning a 90 kW 415 V Constant Torque Drive in Open Loop Vector Mode connected to a 75 kW 415 V Motor for Line Shaft Application in a Paper Machine. The no load running of the motor in decoupled state was perfect up to its full speed. The problem surfaced when the load was coupled...

The following would be the selection criteria for a Drive: I would not suggest you to look at the kW Rating of the drive and motor but select the drive based on the FLC (Full Load Current) of the motor. The Drive continuous output current should be greater than the FLC of the motor. Drives...

The brake chopper is integral to the VFD. Any way I have decided to change the location of the DBR. I will revert back with the outcome shortly.

Thanks sed2developer! I have considered armoured cable and well segregated from other cables. I have no choice but to run this cable as the DBR temperature raise could not only affect the VFD but the room ventilation system as well. I will also reduce the resistance value in the DBR marginally...