Answer Posted / elangovan t

Lightning arrester is to protect the system from any high
voltages such as lightning.
If the system voltage is 11kv, then the phase voltage will
be 11/sqrt(3)=6.35kv. It means the RMS voltage of the phase.
The maximum voltage or the peak voltage across the arrester
and earth will be 6.35*sqrt(2)=8.98kv.i.e 9kv.
Therefore, for 11kv line it is rated for 9kv.

what is the calculation involved to design the heater to heat 10KL of water in temperature control unit?

2002

---

How to select a cable size for particular load?

1879

---

Anybody tell me about modbus hex address of l&t trivector meter er300p??I want to read voltage,current,kwh etc via rs485...If anybody have a manual then send on my mail..Brijeshmodi18@gmail.Com

1947

---

can u describe the method used for protection of transmission line.

2256

---

State superposition theorem?

1201

---

How To Convert Apparent Into Real Power Without Knowing Reactive Power?

1834

---

During regenerative breaking= A rotating magnetic field is reversed B slip is positive C torque is positive D slip is negative

2165

---

what is x'mer ,isolation x'mer & yltra-isolation x'mer?????

2558

---

How to select the cable and voltage drop in circuit?

1830

---

what is Insulation monitoring device. where it is used? (in switchgear room or control panel or in field equipment)

2211

---

What are the three major categories of error?

1266

---

1.WHAT IS A SMART CAPABLE DB ( DISTRIBUTION BOX) ? 2. HOW TO DECIDE THE TYPE OF DB TO BE USED ( RECESSED/ PLUG TYPE/ SMART ETC ETC? 3. WHAT IS MILLENEUM BUS BAR USED IN DB? 4.DIFFERENTIATE MCCB AND MCB.

1893

---

why does make gain margin and phase margin on same plot.?

2188

---

What is Negative Potential Bias

2352

---

Is there any abbrevation for STUB in Stub bus protection

1990

---