Answer Posted / sagar

There is AVR i.e Automatic Voltage Regulator in Alternator. You need to check its settings. There are two knobs provided V+ to increase voltage & V- to decrease voltage of alternator.

If after increasing V+ there is no change in voltage at alternator terminal then check excitaion system.

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

2101

---

I am going to appear RRB Sr. Section Engineer Exam, Electrical. Can you send me previous year questions of RRB Electrical engineer. specially Section Engineer questions. my email id is likerahulworld@gmail.com

1783

---

how unidirectional torque is produced in DC motor?

6779

---

The capacitive reactance of a capacitor of 1/(2(PI)) F at 10^3 H is

1826

---

the site measured knee point voltage of protection class CTs should be greater than rated knee point voltage? what about meetering class CTs. Should it be below the rated knee point voltage?

2241

---

What are the common sources of energy?

1069

---

Is it posible to instal one more SMDB from the existing SMDB and is it practical.

2069

---

how to check regenerative load in drived motor

2210

---

Explain about retrofitting of machine tool.

1876

---

what is the size of cable for 15kw motor and 85 meter cable length using with vfd

2341

---

What is the difference between diesel generator engine with and without turbo charger with the same capacity?

1668

---

Tell me in detail about c.t. And p.t. ?

1135

---

As a electrical engineer.. what are the basic norms should follow in transformer oil testing.. 1.What is the Electrode type? 2.How long time you will give for oil testing?

3621

---

how test transfomer(3 phase75kva) by megger

2093

---

wat is d diffr btw shunt coil and trip coil in VCB?

2815

---