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  1. samanele

    CBCT spurious tripping

    Raghun...We have checked this...the connection is ok...connection is done as shown in figure attachedhttp://files.engineering.com/getfile.aspx?folder=7aa0ef09-3bf7-4328-9cd1-221caab713f4&file=CBCT.pdf
  2. samanele

    CBCT spurious tripping

    yes..scottyuk ur right....3RB12 is a SIRIUS make Solid State Overload Relays. it has earth fault protection feature too...in my case CBCT (CORE Balance CT) is connected to this 3RB12
  3. samanele

    CBCT spurious tripping

    here is the case PCC feeding 1 MCC and 1 VFD MCC. Seq of events 1.MCC motor on DOL running fine. 2.one of the vfd motor start in the VFD mcc. 3.We are facing spurious tripping of few DOL LT motors (conected to MCC )having CBCT wired with 3RB relays. please help me why is this happening and also...
  4. samanele

    Use of EExd cable gland for 6.6 kV XLPE cable termination in motor

    Thanks Zanoter-4. However I couldnt find the information that one may reduce the clearance from terminal to screen end by 150 mm by using boots. The boots are recommended where terminal to terminal (phase to phase) & terminal to ground/TB body are less than specified clearances in air for...
  5. samanele

    Motor Contactors - Line side or load side of VSD?

    I have seen VFD installed with both line side & load side contactors. On the input side of Line side contactor even a SDF is provided. Dont we need similar switch (If safety for VFD damage by motor meggering is must)at the output side considering the output contactor contact welding? Also...
  6. samanele

    Use of EExd cable gland for 6.6 kV XLPE cable termination in motor

    We have almost similar problem in Siemens AG make (type 1MA4 316) Exe 6.6 kV motor. The clearance inside TB, from terminal to gland plate is very less (around 190 mm). As written by Zanoter-4, Raychem kit like EPKT needs minimum 270 mm from the screen end to terminal. Can anyone explain why...
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