extremely urgent please, why a fuse is used before voltmeter but not with a ammeter connected to a CT(current transformer),thanks in anticipation.
4 7935We 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?
1448watt meter have 4 terminals what there name??? and what theses 4 terminals indicates ?? and why 2 terminals are short circuited??
1 5235what is the difference between single ratio, multiple core and multiple ratio, multiple core ? please explain.
NTPC,
1570why the 4 terminal are named as main, line, common, voltage (M, L, C, v) of a wattmeter?? why not its nameed as A,B,C,D??
6 36313Hi,, Just I want ask, if the power factor decrease what happen in voltage regulation? Thanks..
1 2707Post New Electrical Engineering Questions
direction of tarbine& genrator
why 15 kw motor winding resistance is low then 5 kw motor winding resistance?
What are the two basic types of transformers?
Where can i get practical knowledge of solar system?
What is the role of power pack in substation protection system?
please give me all the Alarm .Trip ,Safety Relays & Conditions of UPS Systems mail me on ashokbabunhce@gmail.com
how does ELR works? explain
What are the different types of LT Cables?
Write masons gain formula.
Explain the laying procedure and laying depth of submarine/subsea power cable for 220/400KV system? Also available cable diameter?
how to apply b license to c license in tneb
ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]
technically, what is the reason behind starting the motor star the delta connection .. and what other ways to do this rather than using " star-delta transformer"
send me all basic electrical question and answers
what is the voltages using in movie theaters??? why ??why not other??
