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ZiadAlwr If the load is resistive then measurement proposed above is adequate. But if the load is inductive then current will be less! I suggest you measure temperature of the coil! Regards, Phil Corso

@Djab... Thank you for the information. The motor manufacturer may have proprietary information related to a patent! How much money is in question? Phil Corso

@gps82... The high resistance indicates to me that perhaps its used for heating concrete slabs for plazas or the like! I used something like it in 1962 for the Pay-Plaza of the Verrazzano Bridge in New York City! Phil Corso

@Djaba What do you mean by "Exploded view of motor"? Regards, Phil Corso (PE, Semi-Retired) [email protected]

@Kavitha... Welcome to Control Automation! !. When you say "Jumper" to you mean both 5 Vdc sources are connected together? 2. Or are the two 5 Vdc connected via diodes? Regards, Phil Corso (PE, Sem-retired) [email protected]

@ajb8787... Were u able to retrieve the "87" and "87N" Test procedures, despite the Forum's Refusal to accept my files because they were too large? Regards, to all! Phil Corso (PE, somewhat retired) PS: there are Sensitivity and Stability checks as well, if needed!

Generator tripping on differential protection relay Reply THREAD STARTERajb8787 START DATEYesterday at 1:48 PM Mark Forums Read Search Forums Watched Forums Watched Threads New Posts Unwatch Thread Starter ajb8787 Yesterday at 1:48 PM #1 Hey was hoping some may be able to provide some...

@ajb8787... '87' Test attached!

@ajb8787... Welcome to Control Automation There a relatively simple way to set an "87", and "87N", but it depends on experience of those doing it! If you, or others in your facility, are confident that working around a live, rotating machine but separated from the load bus, I will post the...

@Ali A. Ismail I believe ControlsGuy25 is asking for a Single-Line-Diagram (SLD) of system you want help with! Regards, Phil Corso

@aqib... Which Honeywell office are you in? Regards, Phil Corso [email protected]

@aqib... Another "PRETECT" Statistic: It was installed in a Nuclear plant, BG&E in Maryland. No, not the reactor, but its Ancillary units consisting of 6 BFW pumps, and 2 Steam Turbine Generators! After a run of about a year, EPRI Study NP-5416s, concluded "PRETECT" could increase the On-Line...

@aqib... Another "PRETECT" Statistic: about 4,000 Input Sensors and Output Actions! The idea began after having been assigned a 3-month start-up of the 1st LNG (Liquid Natural Gas) plant, in La Spezia, Italy. I left 7 years later, having literally "exploded" the old belief that a "false trip...

@asghar... Please provide the Single-Line-Diagram (SLD) of your plant's existing facility! If there been an substantial increase in plant kVA or MVA capacity, I can also suggest cost saving arrangements, as well! Regards, Phil Corso (PE, Semi-Retired) [email protected] (Boca Raton, FL, USA)

@aqib... Calculate Overt Failure-Rate (False-operation, i.e., before required) and Covert Failure-Rate (Not Operating, i.e., when required) of each element? Regards, Phil Corso (Inventor of C-MOS Based "PRETECT" Safety System, 13,000,000 Hrs w/o Failure)

@sonacontrol... Measure and record the current-flow at every Control fuse-block! It was something I insisted be done at every Start-Up I was a member of! Another was that the Control-Panel be served by redundant, but separate power sources! I was called to a plant that said my CMOS-Based Safety...

@dhvinay 3) I should have said "Plug-in the UPS (with a Load) into that receptacle!" Then, repeat for next receptacle and so-on, until you find the cause! Regards, Phil

@ahmedsaad85 The stator winding failed to earth (ground)! That is why I always recommend very large LV or your 11kV Motor, protection from such events. In what country did this happen. I can recommend a proper solution! Regards, Phil Corso (PE, Semi Retired) [email protected]

@ahmedsaad85 Have you done any test measurements at all? Regards, Phil Corso (PE, Semi-retired) [email protected]

@dhvinay I pray that your non-reply stance doesn't mean you've been electrocuted! The following instruction will help reveal the problem! 1) Open all breakers in power-panel. 2) Close one powering the closest receptacle to the panel. 3) Plug-in the UPS (and Load)! Repeat for next receptacle and...