Answer Posted / rvg

These are the effets produced when a DC motor connected
with AC supply:

1.Rotor speed will be less than the rated speed.
2. Rotor produced less torque and max. will be very less.
3.Core and copper loss will be more.
4.high sparking at brush, there by reduced life.
5.Motor gets heated up easily.

What is the formula for calculating impedance of transformers connected parallel at fault level 50KA?

2095

---

Define filter?

1130

---

In siemens PLC, why do we want to move the data ?

2329

---

we have 3 single phase transformers. how will we generate 6 supply from 3 phase supply input

2128

---

A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?

2324

---

WHAT IS THE MEANING OF BALANCED / UNBALANCED IN STABILIZER TYPES.

2669

---

In Plumbing services What are accessories we consider for a bathroom?

2001

---

is it possible to say motor horsepower number without seeing name plate(when name plate damaged)

5370

---

How to configure the drives in PLC, through Profibus commnication. And to how to address it?

2846

---

What does the letter CTNM in negative phase sequence relay means?

1823

---

Define the three phase formula fuse.

1876

---

WHAT IS THE CURRENT CARRYING CAPACITY OF 2.5/3 CORE HI TUFF CABLE,WILL IT SAFLEY CARRY 8.6 AMPS OVER 120 METRES,CAN YOU ALSO ANSWER WITH FORMULA FOR WORKINGS OUT ,THANK YOU 3RDYR APPRENTICE.

3573

---

what is the ATS .And how it works.

1633

---

Why do you have to use Protecion relay with the function MTB ( Mechanical Trip Button ) for electrical system.

2212

---

diff. between tension mode & speed mode

2348

---