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Sunny... to start and presuming protection was of the type that limited ground-current magnitude, then ask your rewind company to determine the cause of the ground fault? Ask if failure occurred: 1) Within stator winding slot, but at slot floor? 2) Within slot, but at slot wall? 3)...

Ali... Power measurement is a very good way to monitor chiller performance, especially if you have the machine's flow curves! Regards, Phil Corso

Sensorless... it sounds like the ground return path is ineffective. And your measurement indicates, at least to me, the situation could be extremely hazardous. Furthermore, in another post (1297796659) you made a comment that I interpreted as meaning your electrical background is limited! My...

Sensorless... checkout the following Control.com Threads: http://control.com/thread/1281070067 http://control.com/thread/1297926921 If you find they are inadequate for your needs, let us know! Phil Corso (cepsicon[at]aol[dot]com)

Lazzie Dube... Since your question has nothing to do with the original thread, I suggest you post your problem as a new Thread. Regards, Phil Corso (cepsicon[at]aol[dot]com)

CSA... I don't have one! But I recall you apologizing once because YOU didn't first state the conditions of your reply! Regards, Phil

To all Control.Com participants... this thread brought back fond memories of both Sicilian grandmother's and what they taught me as a child: "Quannu Ai Lu Stomacu Chinu Trovi Difitti Cu Lu Mangiari!" The translation is, loosely, "When one's belly is filled, he soon finds fault with the...

CSA... what is your supposition regarding the size of the grid? Regards, Phil Corso

CCTech... I disagree with your premise that it wasn't a breaker "Trip!" Any opening of the breaker, other than manual action, must result from the "Protection" System, hence a "Trip!" I will concede, however, to any argument that "Trip" action(s) can be prioritized/categorized as to...

Ken... Obvioisly I can't comment on your UPS problem because details are missing. However, I suggest you check Control.Com Archives for: http://control.com/Thread/1026160131 Titled "UPS Protection Coordination" Regards, Phi Corso

Masoud... repeating an earlier Caveat, "I won’t accept anonymous requests for information or help... something to do with the fact that anonymity breeds boorishness!" Therefore, anyone seeking advice or help must go the extra mile, i.e., provide me with some personal information. All I ask...

Krush... are you (or anyone else) interested in how a toilet-leak caused failure of a PLC-based BMS "protecting" a 12-story boiler, and initiated an $800,000,000 lawsuit? If so, contact me off-list! Regards, Phil Corso (cepsicon[at]aol[dot]com)

Pitchet... now try: http://control.com/thread/1026238188 It discusses setting up an "Operations Matrix Table" OMT) to find 'coincident' Electrical and Mechanical parameters! Regards, Phil Corso

Pitchet... try: http://control.com/thread/1026226787 If you are unable to retrieve it, then contact me of list for additional detail! Regards, Phil Corso (cepsicon[at]aol[dot]com)

Daniel Uhrin... lightning problems can be exacerbated by something as simple as the connections used to ground or earth electrical equipment. For example, if the groundING or earthING conductor is routed through a piece of magnetic conduit, the conductor MUST be bonded at both the entrance...

Venu... the circuit was used to prevent reclosing a circuit breaker into a fault! Westinghouse referred to it as an "Electrically Trip-Free" Scheme. Some called it the "X-Y Relay Circuit." Others referred to it as the "Anti-Pumping Scheme!" When implemented, it prevents breaker "pumping"...

Chris... to properly answer your question additional information is required: 1) What is the nameplate data for each motor, that is, as Volts, Amps, Speed? 2) Are they Split-Phase Capacitor-Start? 3) Are they Permanent Split-Phase Capacitor-Run? 4) Are they Two Capacitor-value...

Shree... I suggest you perform a simple torque-bar test to determine if there is significant (qualitatively) torque difference between the two machines! Regards, Phil Corso

Mache Ibanescu... I inadvertently left out the suggested course-of action paragraph: As a start, search Control.Com Archives for thread # 1294270272. If information contained therein is inadequate for your purpose let me know! Phil Corso (cepsicon [at] aol [dot] com)

Mache Ibanescue... Please clarify. Do you want a Rule-Of-Thumb formula for Coolant (oil) Flow-rate vs Xfmr Capacity (kVA)? Regards, Phil Corso