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How to select circuit breakers rating eg. if i select a circuit breakers of capacity 40 amps DC with operating voltage 28 volts and if i what to use same circuit breakers for 300 Volts DC application what is the current rating of this circuit breakers.
1736what is the defination of Cable database? What are the points are considered while preparing cable database? Is there any sample available for cable database?
1907WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.
2077why the three phase transformer's star point does not sparks or seperated? while we often see that two phases touches each other it sparks and ocationaly conductor breakes out.
4 8620Can we parallel two grid with different incoming voltage. Ex.let say one grid is 132kv and another is 220kv.
2 4849Post New Electrical Engineering Questions
what is magnetizing current test in power transformer
how ups works ? various parts of ups and working principle
Why frame of the motor is specified?. If we mention KW and voltage level,automatically frame is decided or separately frame is compulsory to mention?.
can indirect loading be called as phantom loading?
What is the reason of polyphase induction motor tripping suddenly on high current during running at 70% laod? Motor IR , winding resistance & inductance balance. Motor no load current is balance and ok as per mgfr. data.
how to find three phase complex power in per unit and MVA?
How to calculate Temp from Resister from PT100 equation,
why 5kW motor becomes unbalance if its relay trip 1st time and its set value is 7.0 A
What happens if the Capacitive Voltage Transformer Primary neutral is not earthed. There is a CVT between Transformer and source, and the CVT neutral of the transformer is not earthed, does it effect the transformer while charging or does it effect the transformer charging process.
Please clarify 1. Icw: rated short circuit working withstand capacity 2. Icu: Rated ultimate breaking capacity 3. Ics: Rated service short circut withstand capacity 4. other specification of ACB
Electromagnetic torque developed by the motor is compared to shaft torque. A less B same C depends on motor design D more
draw the block diagram of fire alarm?
will 1050kva DG set withstand for back charge of 16MVA transformer
Give details on how you intend to handle a challenging position you are posted to manage unexpectedly as a company staff?
What kind of maintenance is conducted for Transformer
