Answer / rajesh

Extra low voltages means reduced voltages that are used for lightings in parks,swimming pool to eliminate risks of electrcal shocks.

AC voltages below 50VAC and dc voltages upto 120V are cosidered as ELV.

Answer / kiran v

Hello mr sir low
voltage means not
upto 250v.... Low volt
means 1000 volts

Answer / k.prakashchandra

Low voltage is up to 250 volts.There is no standard for
extra low voltage.

what is the physical connection of a analog i/p to a analog i/p module (ab plc)and through a analog o/p module(ab plc) to a analog o/p . and how all the process control by scada

0 Answers  

---

WHAT IS MEANT BY vfd(VARIABLE FREQUENCY DRIVE )HOW CAN WE APPLY VFD TO MOTOR ? I WANT FULL DETAIL IF ANYBODY KNOW THE WEBSITE FOR THAT PLZ SEND .THANK U

2 Answers  

---

why 3 phase motors are preferable over single phase motors ?

6 Answers  

---

how to 2 phase supply from 3 phase

1 Answers  

---

what is the max load on a 10 mva transformer & plz define it with its formula

0 Answers  

---

---

what is necessity of using isolation transformer?

4 Answers   NTPC,

---

At site, we have 30Kw motor (3 phase, 400V,50Hz) and FLC 54A as per the nameplate. At the time of starting it draws 840A instead of 390A (7.2%). As per the data sheet also its 390A starting current. it thru a dol starter from the MCC. can anyone tell what is the problem in the motor

5 Answers   ME,

---

In AC Drives How can change & control its output Frequency?

5 Answers   Jindal,

---

what is cutoff voltage?

3 Answers  

---

what is strip power factor?

0 Answers   TATA,

---

Explain Clearly Pahase and Neutral?

7 Answers  

---

What is mean by sink and source in term of PLC and drives,where and how they used in logic

2 Answers  

---