2HP hyd pump motor 230v 1phase. FLA 10A, reported inrush 53-63A. Customer wants a UPS on it - I found a 4kVA inverter rated for 12kVA surge for 20s. The ~14kVA inrush lasts only a second or so. I've been going back and forth with the mfr about it, he thinks it will burn out 'prematurely' and...
I use a simple contact sensor with an RF transmitter to fire a relay output on the receiver up to 40' away. This receiver is enclosed in a steel box with little or no air gaps, usually a NEMA 4. It seems to work ok with an antenna wire run out through a small hole in the box. I've been looking...
Can anyone point me to a succinct explanation of where to begin in choosing a means of commanding a servo drive via fieldbus (with no fieldbus experience), from a PLC or similar?
I understand there is a command protocol used by the drive that may be communicated via fieldbus, which I should be...
I need to control a 1/2HP 115v motor...nothing fancy, just want to accel and decel - repeatably. I'm driving a 1500# load with an actuator (Duff Norton SPA6420). I found the perfect drive, a Leeson 175322. I need it in 3 weeks, I can't get it for 10. After scouring the WWW on and off for 3...
I'm getting no help from the motor mfr...and have not seen this before, so forgive me
if it's common, but I have a customer who has wired a singlephase motor as shown in this diagram using reversing contactors, and has told me that "it works". I'll have to attach the motor wiring from the data...
How does the NEC apply to a standard 120v receptacle in a metal singlegang jbox mounted to the backplane inside of a metal control panel enclosure mounted to a large (1/2"thick x 8"sq metal tube structure) fixture? There is 120vac coming in to run the panel and controlled equipment, and the...
Thought this was shareworthy, as there is no information broadcast from Siemens about it, I had to figure out with the help of a guy in Germany...
If you (use Siemens LOGO, I'm sure there's at least 1 or 2 people besides me) and got the latest 0BA8, it had an unannounced firmware upgrade I think...
Can you guys help me be sure I'm thinking this through correctly?
I have a 208-230v singlephase 60Hz motor running on a 240v 50Hz supply, and want to get it down to 190v. I am not able to touch the motor, add a VFD, or get different power. I may however, be able to add a transformer near the...
I searched for USB port monitor and saw the latest post was from 2007 or 2010 or something...anyways, there's a lot of free and non-free downloads from a google search, but I trust none of them, and was hoping to get a lead here. Years ago I used serial test (RS232), along with a 'T' cable and...
MGM (italian) Motor on Duff Norton Actuator
230v 3phase 50/60Hz
0.66kW (~1HP) @60Hz
Leeson 174276 1HP VFD
3ph 208vac input
Accel 2s (0-60Hz)
Decel 1s (60-30Hz)
Stop 0.1s (30Hz-0)
Been running this actuator in and out for a day & 1/2 w/o a problem. Was getting some data points and increased...
I need to run a 3HP ac motor with 24VDC. I figured inverting the 24VDC to 230vac, which will feed a 1ph - 3ph VFD, then 3phase ac motor. The input current rating of the VFD is 21 amps.
I found a pure sine inverter of 6000W w/ a surge rating of 18000W for 20s. I have not used an inverter this...
I was informed of an installation of a gate operator installation where the installers had run 10AWG wires a little over 1000' to supply a 208-230v singlephase motor. Due to the voltage drop, they installed 500VA buck transformers at the operators to get 30v or so and ran the transformer output...
We use a 3HP gp motor through a VFD to drive a transmission to move a 10,000 pound gate. I've been asked to make this work on batteries. I need to come up with the most cost effective means of doing this. In similiar smaller systems, I've gotten away with a DC motor, but I need 3HP. I'm...
I have the 2008 NEC and cannot find the required wire size for a 1/2HP 24VDC motor, FLA=20A. I've been pinballing around as it tells me to...in a hurry as always...the tables it sends me to are all for ac voltages..
Someone told me that the NEC states that the max distance between a (in this case, a 3HP 230/460v continuous duty) motor and the controls is 6 feet. I am unable to find this mentioned in the 2008 NEC (latest I have), and don't imagine it has changed since then, but don't know. Anyone happen to...
I need to run a 1/2HP 24VDC motor...FLA=20...for about 12 seconds with around a 50% duty cycle. I have it powered from a rectified 500VA transformer, but it needs to work when the power goes out. Unfortunately, there is no place for a couple of car batteries. I've not been able to get any...
I have a Siemens HMI (model KTP1000 Basic PN)and a LOGO 0BA7 using WinCC (V12 SP1) and Comfortsoft LOGO softwares....I've got all the intrfacing parameters set, and put some buttons and lights on the screen. Everything is talking ok, but I'm unable to get the touchscreen pushbuttons to turn on...
I recently installed some (legal, safe) software and afterwards went to open an Autocad file and I got an error saying that the AC1ST16.dll file was missing. Google and soforth resulted in tons of sites that offered to allow me to download this file, or a program that would 'fix' it, but...
I do not fully understand the compatibility issues and how to make older software work with 64bit OS, but when using AutoCAD 2004 with Windows 7, there is a painfully annoying delay between my mouse action and what's going on on the screen. I've played with changing the screen resolution, but...
I've Eng-Tip'd and googled and searched various vendor sites, but am not finding a suitable disconnect solution. I am using a 3HP 3ph 208v motor controlled by an appropriate VFD, and want to put a manual LOTO disconnect on the load side of the drive. I don't see anything manual with an...
