what is phase angle ? and also tells me why my phase-phase voltages are 390 rather then my single phase voltages are 221 and 223 respectivly?

2 Answers  

---

what is the function of cooling tubes in transformer

4 Answers  

---

how was your last weekend.

0 Answers   HCL,

---

What is BKW of Motor. And what its significance

1 Answers   CGL, PK, Thermax,

---

how we can select a transformer based on a particular load. suppose we have 4 motors of rating 40 h.p , 50 h.p, 80 h.p & 100 h.p. then what rating of transformer we can select. urgent. pls reply

6 Answers  

---

What is the requirement of grounding the neutral of single phase generators on load? If the neutral is not grounded, what will be the effect?

0 Answers   HAL,

---

How much amperes needed for starting of 4HP motor?

1 Answers   CM Smith Sons,

---

when the motor was star position that is running ok but when the motor was delta it was tripped? why?

5 Answers   Nimbus, SEL Manufacturing,

---

What is EMC filter in VVVF Drive ?

0 Answers   Bengal Energy,

---

During Starter Panel Com missing I Found The Main Incomer 40Amp MCB 10KA Trip When Motor Change Star To Delta Motor Rating 20HP BUT When We Use Same MCB To Other Motor It Does Not trip Or What Is Necessaries for Star Delta Starter MCB SFU MPCB OR MCCB And What are The Breaking Capacity of MCCB in the Motor above 15HP

0 Answers  

---

How the size of transformer decreases if we increases the frequency?

2 Answers  

---

What is the role of power pack in substation protection system?

0 Answers   Facor,

---