Answer / sharad

A soft starter is a solid state motor starter that is used
to start or stop a motor by notching the voltage waveform,
thereby, reducing the voltage to each phase of a motor and
gradually increasing the voltage until the motor gets up to
full voltage/speed all at a fixed frequency. The profile of
the increase of voltage depends on the application. The
voltage is reduced and controlled by 3 pairs of back-to-back
silicon-controlled rectifiers (SCRs), which are a type of
high speed thyristor. A soft starter takes the place of a
contactor and can also take the place of an overload relay
in a standard motor starting application.

What is the actual calculation for transformer short circuit test?.

0 Answers  

---

What are the types of earthing? Explain dagramatically.

3 Answers   Siemens,

---

how i sync. the different size of generator.

4 Answers   ISB,

---

what is the difference between electrical and electronic choke?

0 Answers   TCS,

---

HOW TO CALCULATE EHV CABLE SIZING?

2 Answers   L&T,

---

We have two parts in generator, electrical & mechanical. how it works?

0 Answers   TATA,

---

what is 3rd Harmonics? how it is generated in alternator

2 Answers   Aditya Birla,

---

ho w to make Incident and accident reporting

1 Answers  

---

how can you prove that in CE configuration a transistor has 180 degree phase shifted output

5 Answers   Bhel,

---

what are the tests comes under the type test, what tests comes under routine tests.

0 Answers  

---

what is EIB lighting control system? what is the advantages of this system?

0 Answers  

---

how to test YNyn0 vector group in transformer?

0 Answers  

---