11kv/0.433kv, 2 mva , transformer , for protection and
metering how many CT/PT are required?
Answer Posted / vishal
3 CT's and 3 PT's wil; be required for each phase of transformer
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
how we can calculate chiller required ampear?
The gauge indicates the number of amps, but what about voltage? How voltage rating (for wire or fuse) determined?
what is the difference b/w ATS and HTS?
What is the drawback of class b amplifier? How is this minimized?
I want definition for ABT Meter (Availability Based tariff) ?
What is the current carrying capacity of 0SWG,3SWG,10 & 12 SWG solid bare overhead copper conductors?
what is the need of starter in tube light and what type of starter is used in that?
The simple way of finding the leakage quantity and % in compressed air distribution system
what is upper impedance and lower impedance of a distance relay
why surge protectetor work explain with the help of circut diagram?
How many devices can be connected in one zone of FACP
Define demand factor?
We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?
what are the maximum available current, voltage ratings and switching speeds of the power electronic devices thyristor, power mosfet, igbt, and mct?
what is control supply rating of a machine