Answer Posted / amit gavali

PLC: PLC is solid state device.......it is one type of controller but SCADA is process which is associated with PLC

What is true sine wave or pure sine wave inverter?? Is it sine wave or step wave?? If it is step wave, waves with how much step is considered as pure sine wave? Is it possible to produce pure sinewave using power electronics?

1867

---

Some times to change of DOR of a motor, interchange of R & B is not effected and RYB take same current, but interchange of R&Y is effected ie change the DOR. My doubt is what is the problem in motor and how it is happen.

1991

---

how to calculate the change over time for star delta starter for different KW motor?

4217

---

What is the de rating factor of cable? What is the importance of the de rating factor in cable select

2376

---

What is kirchoff ’s current law (kcl)?

1078

---

Can we convert off line transformer to on line transformer

1978

---

How to identify the start and end of 3phase 12 lead motor if U1, U2, etc numberings are lost or erased.

2140

---

why industry prefer ht motor instead of lt motor.

2110

---

why any centrifugal blower draw more current in starting. consider id fan and fd fan?

1854

---

What is Faraday's law

1500

---

What is power relay?

1240

---

I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?

1865

---

if the load is 80 amp for main fuse and 100 amp for breaker so how can we calculate the cable size (cooper ) .

2069

---

what are the difference between AC lamp and DC lamp

2091

---

what is the differences between microprocessor and general purpose computer

2175

---