Motor Testing Equipment
Motor Testing Equipment
(OP)
Anyone had used motor testing tool like "ALL TEST Pro 31"? How this tool take advantage over Surge Comparison Test?
Thanks,
bill
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
Motor Testing Equipment
|
Motor Testing EquipmentMotor Testing Equipment(OP)
Anyone had used motor testing tool like "ALL TEST Pro 31"? How this tool take advantage over Surge Comparison Test? Thanks, bill Red Flag SubmittedThank you for helping keep Eng-Tips Forums free from inappropriate posts. Reply To This ThreadPosting in the Eng-Tips forums is a member-only feature.Click Here to join Eng-Tips and talk with other members! |
ResourcesWhat is rapid injection molding? For engineers working with tight product design timelines, rapid injection molding can be a critical tool for prototyping and testing functional models. Download Now
The world has changed considerably since the 1980s, when CAD first started displacing drafting tables. Download Now
Prototyping has always been a critical part of product development. Download Now
As the cloud is increasingly adopted for product development, questions remain as to just how cloud software tools compare to on-premise solutions. Download Now
|
RE: Motor Testing Equipment
The test approach is totally different.
Surge test will develop a high voltage-ringing wave through the winding impedance (signature) and will compare it to a known good sample. The test surge could destroy weak insulation.
Pro-31 will measure winding parameters like; resistance, capacitance, reactance, Insulation resistance and PI, then these parameters are evaluated and compared to those when the motor was original or new.
I should use Surge Test for production test and Pro-31 for maintenance evaluation purposes.
RE: Motor Testing Equipment
How about there feature such we say user friendly interms of usability, reliabilty, result interpretation, and testing set up?
In Pro 31, parameter like angle, I/F, etc can you define what these stuff?
RE: Motor Testing Equipment
Impedance
Phase Angle
Current/Frequency Response (user-controlled)
Insulation Resistance
Automated Rotor Test
You may download a detailed data sheet on the instrument as well as the complete operations manual at:
ht
Dave G.
www.ReliabilityDirect.com
RE: Motor Testing Equipment
The tool you are asking about incorporates several measurement techniques into one box.
I'd like to mention that there are many additional motor test capabilities integrated into modern surge testers.
Newer surge tester boxes often incorporate: Kelvin Resistance Bridge, Meg-Ohm, Dielectric Absorption, PI, DC Step test, Continuous ramp test, and DC-High Potential test. There are big improvements in Surge test sensitivity. I guess what I'm saying is that there is a lot more capability in newer equipment.
Generally speaking, I believe comparing a battery of 4-5 other measurement techniques against a single other test (such as surge comparison) could be limiting your options.
George
RE: Motor Testing Equipment
Certainlly a hugh difference is the initial capital investment. A surge tester is much more expensive.
RE: Motor Testing Equipment
Thanks guys, aolalde is right! it's about capital investment. Eventually, i agree to use it (pro 31) in troubleshooting and maintenance especially predictive while surge comparison for newly rewound machine.
Thanks.
RE: Motor Testing Equipment
I already have 12 KV, 15 KV & 30 KV Baker surge testers with DC Hipot function. All 1994-2000 vintage. No major problems with them so far except local support is zero. I need to contact Germany for any issues.
I am on the lookout for a new surge tester with added test facilities like ac & dc hipot, resistance , IR & PI measurement.
Can you recommend some reliable and reputed manufacturers ?
Thanks.
RE: Motor Testing Equipment
=====================================
Eng-tips forums: The best place on the web for engineering discussions.
RE: Motor Testing Equipment
I only know as Epete described PJ and Baker. We have used both mainly for surge test of new coils and windings according to IEEE STD 522, I don’t know the quality of their international support.
h
http://www.pjelectronics.com/
RE: Motor Testing Equipment
RE: Motor Testing Equipment
I just visited PJ site.
"PJ Testers are precisely engineered and hand crafted...
with quality commensurate to that of a Rolls Royce and
with performance commensurate to that of a Lamborghini.
"
"The best Surge Tester on the Market... just got better!"
Are their claims true or is it just hype ?
RE: Motor Testing Equipment
ElectricPete is missing something, "Baker and PJ Electronics are the only ones that make surge testers"
Aside from Baker, I've been using "Electrom surge tester" particularly in field services,troubleshooting, condition monitoring and testing primarily due to its portability and diverse test capability.
http
RE: Motor Testing Equipment
Thx for the tip.
RE: Motor Testing Equipment
It appears quite a bit of data regarding on-line monitoring and other new diagnostic techniques is posted as well.
http://www.bakerinst.com/
RE: Motor Testing Equipment
I'm interested with ALL TEST PRO 31, perhaps when considering
its cost?
Any one could furhter elaborate the pros and cons against Surge Tester, the fact i never tried ALL TEST PRO.
RE: Motor Testing Equipment
Back to the original thread, regarding advantages of AT31:
A gentleman I know works for a large Aluminum mill.
In his job there are 1000s of motors to be tested on a regular basis. He is very skilled, and well equipped with most (if not all) the brands mentioned in this thread.
He used the AT31 at length (for years) and was not impressed. Only found he was able to confirm shorted motors after they had tripped the breakers. He said he never once predicted a motor problem using the 31.
He gave up using it and went back to using various testers that could impress more than 500-1000V. These testers cost more money, but his finding was that he was getting value by being able to reduce down-time, his wasted time, and discovering motor and cable faults before they had progressed to short circuits.
I believe the AT tool is for you - if interested in reducing your time spent trouble shooting after a motor trips it's breaker to confirm failure. (Though all of the various 'expensive' testers work too) This can be a significant time saver, but being reactive, likely would not improve over-all plant productivity in any way.
If interested in pro-actively detecting weakness before process interruptions, (predictive maintenance) it may have serious limitations (i.e. 'don’t work as expected') in your environment.
My previous comment about modern surge testers (and other types of more pricey boxes) is they incorporate several added techniques, (instead of only one test) that allow greater sensitivity to impending motor problems/failures.
His opinion of the 31 was enough. Others may report different experiences.
George
RE: Motor Testing Equipment
Surge testing requires the application of high voltages and currents, and can be a destructive test, actually generating faults. This aspect, combined with the size of surge testing equipment makes it inappropriate for troubleshooting and predictive maintenance testing, especially on larger motors.
In a healthy 3-phase motor, the windings are electrically “balanced”. These balanced electrical characteristics include passive properties, such as resistance, and active properties, such as inductive reactance and impedance. As faults develop, one or more of these electrical properties will change, depending on the type and magnitude of the fault.
ALL-TEST instruments are unique in that they perform a series of impedance-based tests (inductance, phase angle, impedance, and a current / frequency ratio) on each winding. These measurements and their balance across the three phases provide a clear picture of the condition of the motor circuit. This test and analysis method will quickly indicate the presence of a fault, even at its earliest stages. The tests are preformed at low AC voltages, so there is no stress to the windings.
ALL-TEST methods are static measurements, meaning that they are made on un-energized motors. In this regard, they are useful not only for predictive maintenance activities, but also for checking new, recently repaired, or failed motors.
RE: Motor Testing Equipment
Now, to consolidate all your views;
All Test PRO:
less expensive, handy, easy to set up, less winding stress, easy to interpret, good for troubleshooting, but less reliable for predictive maintance.
Surge Tester:
expensive(comes with different testing functions), bulky, easy to set up, high winding stress, difficulty data interpretation (for less experience oprator), good for newly rewind, but less reliable for predictive maintenance.
Any comments to add?
thanks,
billy