in 3phase 50kva dg what is the full load current for single
phase laod
Answer Posted / sks
50*1000*.8/1.732/415/.8=69 A Per Phase
| Is This Answer Correct ? | 10 Yes | 0 No |
Post New Answer View All Answers
following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
UG cable sizes were specified in sqmm. But practically its not coming to mesure. What's the reason for that? And how they specify the size of the cable?
comparision between ACB and VCB
What are the disadvantages of autotransformer?
what is meant by the phrase 'static load' in case of shorting in a generator excitation system?
There are different classes of protections in power plants.class a,b,c are clear..is there any class d and e r there..and elaborate class b protection.
how ups works ? various parts of ups and working principle
What happened ,If 3 phase clearance not maintained in 33KV Line,11KV LIne etc?
What do you mean by power transformer?
we use 400/5A ct and 35/roor3KV,/0.1/root3KV,0.1/root3KV pt ratio. What is the multiple factor of this meter.
How does a television work?
How time response of the system is divided?
State ohm’s law?
what is the effect of higher value of GD???