what is the safe meggar values for motor, transformer HT, LT
and Cables?
Answer Posted / gupta
it is 2 Mohm/kv
| Is This Answer Correct ? | 9 Yes | 13 No |
Post New Answer View All Answers
Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.
why the check zone and main zone are used for Busbar Protn. scheem?
What the difference between ac and dc inductor an capacitor
Why are lt windings placed near the core?
what is meant by impedance & transient protection?
design of IGBT firing circuit for 11KV
from generating station If 400v LT line length is 1000m how much voltage is drop and how do i calculate it? which cable will be use for this line?
grr resistance & contrator malt continuous
why different series of vfds (like allenbradley)are used in industry ?
What is I to C?
is the value of inductance depends upon the value of thitha in doubly excited machine??
is that a problem if i connect a single phase load to a secondry delta connected transformer but i get a neutral from other transformer i the system?
what is smart grid? why we use it? explain in detals bcoz i want give presentatin from it....
Bimetal strip used in overload relay what is that,which types of material used for that & percentage.
what is meant by LCR meter? where its useful ?