## Why we don’t use 2-20mA, 1-20mA, 3-20mA or 10-50mA signal instead of 4-20mA ?

Answer : Generally, in a transistor some amount of voltage is required for turning it on…

## How to calculate the flow rate in Vortex flow meter ? What is K factor ? Can you give me an example calculation to understand the same as better ?

Answer : Vortex flow meters are flow sensors that detect the frequency of vortices…

## Can we connect two or more energy meters/Amp meters on one CT set (Three phases) ?

Answer : Yes we can connect two or more energy meters…

## How to calculate the slowness and fastness of energy meter if we have different kw load for example (0.746 kw and meter rev constant 400 and we calculate the 2 rev in 30 sec) and explain the formula ?

Answer : Meter rev constant means…

## Will the introduction of capacitor bank parallel with the induction load reduce power consumption ?

Answer : Yes,it surely does. Actually capacitor bank feeds…

## What is stepper motor ?

Answer : Stepper motors are DC motors that move in discrete steps…

## What are the types of transmission line ?

Answer : There are 3 types of transmission line…

## What is name of Transformer Oil ?

Answer : Transformer oil is called as mineral oil which is free from FATTY acids…

## What is the full form of cable type – AYWY, AYWAY, YWY ?

Answer : A = Appearing as a first letter denotes Aluminium…

## What is meant by AYFY Cable ?

Answer : AYFY Means Alluminum PVC Insulated Flat strip armour and PVC outer sheeth cable…

## Selection Charts for DOL Starters (L&T Switchgear)

Answer : Fuseless Protection for DOL Starter Feeders with…

## For 415v, 3phase, 22kw rating of motor how to calculate MCCB rating ?

Answer : Convert KW to HP (KW/0.75)…

## Why we are used APFC Panel in industrial area. When P.F. low then what will be the effect in our system ?

Answer : When the power factor is unity, then industries receive active power…

## The transformer which is smallest in size is and how to calculate that ? The options are 100 KVA, 50 Hz; 100 KVa, 100 Hz; 100 KVA, 25 Hz; 50KVA, 25 HZ ?

Answer : 100 KVA, 100 Hz…

## What is meant by IP55 motor ?

Answer : IP55 does not indicate sealing…

## What is PTZ Camera ?

Answer : PTZ stands for Pan, Tilt, and Zoom….

## Explain the functions of main isolation switches ?

Answer : The isolator is a mechanical switch which isolates….

## What is the use of conservator, buchholz relay, breather in a transformer ?

Answer : Buchholz relay is to protect the winding from over heat…

## What is the difference between KV, KVAR, KVA, KW ?

Answer : Kv is called as Kilo Volts or 1000Volts…