Answer / k.prakashchandra

1.0 class is for measurement 1%- error at full load.Other
two are for protection. 5% error at 10 times the rated load
and 10% ---

Answer / k.prakashchandra

Wrt my reply ,please correct as '5% error in measurement and
capable of taking current 10 times the rated and so on'

Answer / harish kumar

actually cl is acuracy , means in what percent accuracy, cl 1, 0.5 is for metring purpose , and cl 5p 10 , ps , 10p10 is all for protection means for relay out put , means 5 % accuracy and 10 % accuracy

need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.

0 Answers  

---

If I want to lift the water at a height 50m from ground level through two inch(diameter) metal pipe then what is the capacity of motor pump is required? is it possible in single phase supply or not?

0 Answers  

---

What is the meter used to check the DG sound level.and pollution check

2 Answers  

---

why we are using in reverse power relay in generator singranizing

1 Answers   Dalkia,

---

how do you find making current and breaking current of the circuit breaker

1 Answers  

---

what are the types of cables?

3 Answers  

---

In Panels Main Incomer considered should be TPN or FP?

2 Answers  

---

why transmission voltage is 230kv and not 220kv which is a multiple of 11

1 Answers   Mettur Thermal Power Station, Siemens,

---

why there is a phase difference between line voltage & phase voltage ?

4 Answers  

---

how much flux density of CRNO core

0 Answers  

---

what is the magnitude of earthing and neutral voltage

2 Answers  

---

what is the difference b/w ground & virtual ground?

0 Answers   Accenture,

---