Interested to Buy Any Domain ? << Click Here >> for more details...
I want to know what must the CT ratio be on a load of 300A
is a 3PH nutral to earh installation?
- 4 Answers
- 6139 Views
- I also Faced
- E-Mail Answers
Answer Posted / a.p.nanjappa
The neutral is a point in power transformer or in motor
connection where all phases are connected.In this point
voltage is zero. when you connect thisoint to earth, the
fault current or capacitance circulating current flows to
earth.
when a fault occurs , current is high.Therefore,CT ratio
should be 1000-1200/5 or 1A.
It is usually upto designer or protection device supplier.
| Is This Answer Correct ? | 0 Yes | 1 No |
Post New Answer View All Answers
How does the phase sequence controller works, how it identifies the phases? confirm working principle
What is the function of interposing current transformer?
what is the use of Auto re-closer?
Define super node?
How do you compute voltage drop and cable size over distance?
While performing stability test of differintial cts how to know the voltage and current on both side of the transformer?
1.how many earth pits are required for 1000 k.w plant include substion , transformer ? 2. how many earth pits are required for 500kva generator.what is formula to calcute?
how we select ac fuse rating of an power inverter???
Difference between a pilot wire and a normal conductor?
what is the defination of Cable database? What are the points are considered while preparing cable database? Is there any sample available for cable database?
Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?
what is the eight bit unit?
what kind of quetions will ask in BHEL in interview? Plz help me?
What is a differential amplifier?
why the starting voltage drop in a cable needs to be limited?what is percentage of the voltage drop allowed during starting?
