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Brent77 Q4. Is the Stop-Start Station located in the block adjacent to the motor? Phil Corso

Aha, a D.I.Y.S.G. or "Do It Your Self Guy" Brent, I can't wait forever, but I'm close to it! Phil, (Floorida, Former New Yawker)

Brent77... Welcome to Control.com! The delay between 'start' and 'trip' is understandable, because only 'C phase was at or near the motor's rated capacity! Q1. How old is system? Q2. Are you sure that Overload"s" (plural) tripped? Q3. What are/were Voltage-Ampere-Power readings, with motor...

Rajat... Welcome to Control.Com! Please furnish recorded measurements for each phase, i.e., V, A, P, for each Phase! Phil Corso

Rajat... Can you reveal the name of the Furnace Mfg? Regards, Phil Corso

nzfarmer My "BSEE" degree was "Electronics"! Unfortunately, the company I started with needed "BSEE" Power. The Chief Engineer suggested I become an Electrician's-Helper, for 6 months! I got 2 "MSEE" degrees some 8 years later in, one in "Power"! The other in "Protective Relaying! " Being an...

cl302i Increased frequency means increased speed means greater cooling effect! Phil Corso

@khalidgee1986, @ WTF? The error was mine. I thought you wanted the best. I failed to realize you wanted "An" NGR. Taken literally, that means "One" Resistor. Thus, WTF?'s answers, Af=100 Amperes, NGR=63.5 Ohms, Fault-DurationTime Ft=10 seconds, can be used. I apologize, for having...

@khalidgee1986 & WTF? 1. You have not accounted for various component-capacitance! 2. You have not provided time-coordination with downstream earth-fault devices! 3. 100-A earth-fault current for 10 sec will damage stator-iron! Regards, Phil Corso

khalidgee1986 Do you no longer want to continue your original request for an Generator NGR? Phil Corso

@cl302i 5. Are you sure that Line-currents and Ph-Ph voltages are equal? 6. Are you able to read Ph-Ph Voltage and Line-Current Harmonics? 7. What is Vibration-Level? 8. Is this same oil-field we talked about in 2020? 9. Have you measured temperature of SPOC equipment? Phil

cl302i 1. What are depths? 2. What are drop-cable parameters, 3 conductor 3-foil, or 4 conductor Flat? 3. Are source voltage phases and currents balanced? 4. Have you tried to elevate source voltage to say 490V? Regards, Phil Corso

khalidgee1986 The data shown in the attachment you provided is that of a Low-Voltage 380/460-V, 50/60-Hz, Stanford PM Generator! There is NO information that can extracted for your goal of providing an NGR!!! Regards, Phil

khalidgee1986 1) Are the generators Wye or Delta connected? 2) Assuming Wye, I'm suggesting you familiarize yourself with what is called in the USA, the Distribution-Transformer & Resistor Grounding (Europeans call it the Earthing-Transformer & Resistor Earthing). Unfortunately, other important...

]khalidgee Welcome to Control.com! I understand the economic and operational advantages of Single and Multiple NGR schemes! But you should chose one that produces 2 major goals: a) stator-winding damage, not stator-iron damage! b) operator simplicity. Thus, I recommend you consider...

gubavac111 Stop doing what you say you're doing! Following is an excerpt of USA Std, IEEE Std. 43-2000: "New limitations on the use and evaluation of PI were issued. This test is no longer as easy and straightforward as it once was because most new insulation systems start with test results in...

jfenwick Welcome to Control.Com! 1. Do you know the panel's S.C.C.R.? 2. Are all components in the panel UL listed, including the wires and/or cables? 3. Are you the only one that has access to the panel's interior? 4. Are wire terminals access able? Even if you answer the above properly you...

Rohansartape Welcome to control.com! While it is fairly easy to "Brake" a BLDC motor, VFD/VSD control is extremely difficult! I, like James Ingraham, can't understand why you want to mess with the most efficient motor in service! Regards, Phil Corso

ICStudent Welcome to Controlcom. At the top of the page there is a Magnifying-Glass. Center your cursor directly over it and the word "SEARCH" will appear! Then move your curser over "SEARCH" and ask the question, "Can Thermal-Mass Measure Air-Flow"! A number of previously submitted answers will...

challaturuteam Welcome to Control.Com. Adding to your advice! One must be aware that cable length and size between single-phase source and VFD location could affect operation! Regards, Phil Corso