A cable with concentric PE conductor must be used with frequency converter circuits what does its means.?

1575

When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

2155

what is active power & reactive power?

2190

What the main causes of transient interruptions on Over-Head Distribution Lines?

2146

how to test and calculat the head and discharge in borewell compressor

2158

Explain Energy and Power signals?

1769

How many capacitors using in LT panel as per Govt rules?

1972

do any one help me to get "C" license,, i have doubts ,,, if mediators ter pls call me,, my no is 8056640042

1433

how to calculate the earth mat design in 132 kv substation yard ????

6246

If the rated speed of a d.c. Shunt motor is1440 r.p.m, which method of speed control would you suggested to obtain a speed of 1500 r.p.m?

1152

ROC converges if pole and zero lies inside a) origin b) z=1 c) pole d) zero ? Explanation please? if ROC does not converges then?

2951

What is the minimum value of hfe for the oscillations in transistorized rc phase shift oscillator?

1270

How does the slip regulator works as a startor

1969

How to calculate MCB Breaking capacity.

1521

Which device is used for the source of emission of electrons in a crt?

1268