Answer / vishnu

The controller is located within the drive itself,
communication delays are eliminated therefore improving
performance in automation and motion applications and
removing the need for external controllers, saving panel
space. Also Drives protects the motor from overcurrent and
other electrical hazards

why in some cases the receiving end voltage is higher than the sending end voltage in transmission line (called 'Ferranti effect') ????? whts the reason behind tht???

3 Answers  

---

HT/LT PANEL TEST?ALL TEST

0 Answers  

---

How to select the ratio of neutral ct? Is there any relation in between percentage impedance and neutral ct ratio ?

1 Answers  

---

how can 3phase motor speed can be controlled without vvf drive?

1 Answers  

---

What is the difference between earthed and unearthed power cable.

1 Answers  

---

in a delta-star with neutral grounding on star side what will happen if one star limb  got opened at star point

1 Answers   NTPC,

---

During Millivolt drop test current leads are applied in the extreme ends and voltage leads are given just before the current leads.. what will be the difference if voltage leads are given in the extreme ends? and why?

1 Answers  

---

Now I inject 1kv DC supply r&y=??? R&Y=?? Y&B=?? B&R=???? RYB&N=??? RYBN&E=????? Minimum value====???????

1 Answers   Integra,

---

What is the types of HT motor testing

0 Answers   ABB,

---

True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)

0 Answers  

---

In general bus riser follows the bus section in SWGR. What are impacts if bus section follows bus riser?

0 Answers  

---

What is the avergae difference between OTI and WTI for EHV Power transformer?

7 Answers  

---