Answer / melwyn

to prevent load(motor)of 3 phase from failing of any one
phase.it is connected to 3phase load,when one of phase is
gets failed(due to burned fuse or contactor problem)this
device senses and it will turn of the system

Answer / rakesh kumar c attingal

single phase preventer used to stop the working of 3 phase
motor in the absence of supply in one phase.

Answer / anupam

In 3 phase system..if motor miss one phase..then motor will burn..so spp is used for the safety for motor..if one phase is missed..then the system will tripped or disconnected.. So motor will not burn..

what happend if the protection ct is by mistake put instead of measuring ct & vice versa?

2 Answers  

---

1.main parts of generator? what is used A-check,B-check,C- check? 2.what is FM200 system in data centers? 3.difference between pac,ahu?

0 Answers   TATA,

---

Star & delta kis principale pa hai.

3 Answers   ME,

---

what happens when power factor leads or lags to electical or home appliances

2 Answers  

---

why do we not use equivalent voltage source in negative sequence equivalent ckt.

0 Answers   TATA,

---

---

Why the colour of insulator is always is chocolate in colour?

1 Answers   MRF,

---

a 650 KVA diesel generator is 1500 rpm, voltage is 415V n full load amps is 805 something,when are applied load more than 400 amps it's voltage is dropping, what is the reasons...?

4 Answers  

---

What is ac and dc drive.

1 Answers  

---

why do we prefer a 3-phase delta connected load rather than star connected?

4 Answers  

---

why we have to do tan delta test of the transformer oil???

5 Answers  

---

Why Transformer in KVA?

41 Answers   APCPDCL, Apollo Power, College School Exams Tests, Electrical Tech, Hitech, HP, L&T, MDL, Oil and Gas Jobs, TATA,

---

why 3 phase motors are preferable over single phase motors ?

4 Answers  

---