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Categories >> Engineering >> Electrical Engineering        Suggest New Category      Question  Asked @ Answers Views     select   Recently we had experienced following problem All RCCB breakers (connected to the load as well as spares) connected to various UPS systems at various floors at a high rise building tripped during a power break down and upon starting up of generator.This Generator is recently inducted into the installation. Can any one explain the reason behind this tripping. Regards Viswanathan  1  262 What is the method for testing the differential protection stabilty in generator? When the time of starting What will happen if differentail protection connection wrong means?  0  109 what are the methods of speed control of dc motor???  3  758 If the rotor pf of a 3 phase induction motor is .866, then what is the phase displacement between stator and rotor magnetic field 1)30,2)120,3)150,4)90 please justify.... GATE  2  445 what happens if number of poles in stator and rotor windins of slip ring induction motor are not same. Will it rotate near to the synchronus speed defined by stator? GATE  1  739 why CT output is always raetd 5.regardsof primery curre. ABB   2  1192 How phase displacement change in the over current relay coils.  0  208 why CT ratio stand for 50/5, 100/5, 25/5. ABB   7  3525 How the oil level of the Buchholz Relay come down.  3  1008 can you show me the components inside a air circuit breaker with connection diagram?  1  636 in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?  0  82 why we are using the 2 slope in differential relay?but in busbar differential we are using only one slope. what is the reason.  0  94 how i decrease the neutral to ground voltage , thats i read 7v on my digital meter.i dont know about my earth pit.  2  558 How Arc Produced in Circuit Breaker When the contacts of the circuit breaker open.  1  570 How Arc Extinguish in Minimum oil circuit breaker and What is the function of Radial and axial vents of turbulator in Minimum oil circuit Breaker Where these vents are exists.  0  205 E-Mail New Answers        Answer Selected Questions        Post New Electrical Engineering Question Prev    1   ... 57   ... 113   ... 169   ... 225   ... 281   ... 337   ... 393    459   [460]    461  ... 561   ... 617   ... 673   ... 729   ... 785    Next         Civil Engineering Interview Questions     Mechanical Engineering Interview Questions     Electrical Engineering Interview Questions     Electronics Communications Interview Questions     Chemical Engineering Interview Questions     Aeronautical Engineering Interview Questions     Bio Engineering Interview Questions     Metallurgy Interview Questions     Industrial Engineering Interview Questions     Instrumentation Interview Questions     Automobile Engineering Interview Questions     Mechatronics Engineering Interview Questions     Marine Engineering Interview Questions     Power Plant Engineering Interview Questions     Engineering AllOther Interview Questions       Un-Answered Questions    Question Views Asked at   Select   is it possible to start a motor in felid connected to a remote mcc 74   if we install two earth pits with a clear space of 5m without any interconnection,by checking the digital multimeter will it show continuity between earth pits? If so what would be the approx. value 30   why noise occurn when transformer is working ? 106 Honda in cvt,there are two windings,1a,1n and 2a,2n.in my one project i use only one winding i.e.1a,1n. the other winding is not in use, so i connect it in open delta and want to close it by ibsertibg thermal resistor. the output of cvt is 132kv/115/sqrt3. plesae tell me exact value of resistor, so i may close it to avoid the resonance phenomenin. send me answer on this email adress please. aetcon-po@aetcon.com 177   PLZ EXPLIN ABOUT CLASS PS CLASS CT .WHY THEY R DESINED AND FOR WHAT PURPOSE?WHY OTHER CT CANT BE USED AS PS CLASS CT? EXPLAIN IN SIMPLE LAUNGAGE IF POSSIBLE PLZ GIVE CIRCIT DIAGRAM?EMAIL-RAJ_SINGH_0376@SIFY.COM 124 ABB why current flow to the opposite direction of flow of electrons??????????? 95 Bhel what is the setting of locked rotor in HT motor ? (answer expecting in percentage) 140   what is the preventive maintence for ht panels and busbars and vcb abd acb's. 228 Future-Group why the electrolyte level in lead acid battery is maintained 2.5 cms above electrodes? 100   i want to know that how the height of Ct ,cvt ,LA calculated on the basis of creepage distance 108 Vedanta How to calculate no of EARTH PIT? Describe the formula as per IS standard? 116   How to measure the earth resistance value in a concrete pavement(flood light area)? 64 ANZ E-Mail New Answers        Answer Selected Questions

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