Hello. I have a Siemens 3RK1315-6LS41-3AA-5 motor starter with reversing contactor. Is it possible to use the digital inputs to reverse this device? If not, is it possible to use ASI to accomplish reversing. The reversing would only need to be done in a jog fashion momentarily upon occasion.
I am somewhat new to Step 7, but not to PLC's. I seem to have a problem grasping the concept here when it comes to the inputs and outputs of what Siemens calls the "Variable Declaration Table". Are these I/O real physical inputs and outputs?
I have a bad resolver on an Allen Bradley servomotor. It is an AB 1326AB-E3E-11-TJB. There are no numbers on the resolver. I can get no information from the manufacturer. How can I go about sizing up a suitable replacement? Any help is appreciated.
I have a Reliance GV3000 which trips on "OC". I have a 30hp, 480v motor with a 60hp drive. The LRC goes up to 78 amps in about 4.5 seconds. Then the drive trips on overcurrent. I have tried to adjust the acceleration slope having numerous values from 5 seconds to 20 seconds. The drive still...
Can anyone explain the difference between code letter and design letter date found on motor nameplates? It apperas though both are related to locked rotor current. What is the difference between the two?
Has anyone worked on a Brown Boveri AAD 6001 dc drive? I have one on a Gleason machine that controls a Reliance 60HP dc motor. The drive trips frequently. There are leds on the regulator board and I do not know what they indicate. I have no manual. Can any steer me in the right direction?
I have an ac generator I am trying to evaluate. It is Made by O'Keefe & Merritt. When I hold in on the start switch, the unit starts. But when I let go of the start switch, I lose my output. It is as though the start relay is not being latched. Can anyone help me with this problem?
Thanks
Is there a procedure for determining how to properly identify the leads on a 6 wire 3 phase motor? The motor leads are unidentifiable. The nameplate only shows T1, T2 and T3 connections. This is a 460v, 150hp motor. Any direction would be greatly appreciated.
Forgive my ignorance, but can anyone give a simplified explanation of how PWM works? I understand this is the fundamental concept behind most VFDs and that the duty cycle of the pulses at a certain frequency is proportional to maximum motor speed. Is this partally correct?
What are the recommended guidelines for sizing the equipment grounding conductor to put on the drives PE connector? Shall it be sized in accordance with NEC table 250.122? Or are there other requirements or considerations regarding this conductor? This is on an extruder control panel. The drive...
I have a 1404-M605 powermonitor 3000. I have RSPower32 software and have been given a project to see if it is useful for monitoring purposes. Has anyone used this device before? Any help using the oscilligraph and configuring logs would be greatly appreciated.
I have a 1404-M605 powermonitor 3000. I have RSPower32 software and have been given a project to see if it is useful for monitoring purposes. Has anyone used this device before? Any help using the oscilligraph would be greatly appreciated.
I have probably 10 or so communication cables. I use them to communicate with plcs and drives. I recently saw a technician work on a GE 90/30 plc and then go to an AB SLC500, then a Control Techniques QuantumIII digital dc drive all with the same cable. He said it was a kind of universal cable...
I have a Square D Nema size 1 contactor I would like to use. It is missing heaters. I want to control a 3 phase 480 ac motor whose F.L.A. is 4.6amps. Is there a website I can go to where I can have access to heater table data?
Thanks
I have a transformer with a 460v delta primary and a 460v y secondary. It is an isolation transformer. It is 220kva 3 phase, winding rise 150 deg c, 5.20% impedance @ 170deg c.
What does the winding rise mean?
Thanks.
This may fall under the category of NFPA 79 which is
"Electrical Standard for Industrial Machinery". If so, can anyone reference it or tell me if there is a problem with the following scenario? A thermoforming, injection molding or any other industrial machine which is fed from a 480v busway...
We have a Sencorp a.k.a. DT Industries machine where all of our winders are telescoping. Anyone ever experience these kinds of problems? If so, I sure would appreciate some advise.
Thanks
