Answer Posted / hin sothea(ctl)

OLTC On Load Tap Changer in Tr. Is mean that the changing
Tap of Transformer is according to the changing of loads
at low voltage side. Any way chang Tap mean chang the turn
winding of Primary side of Tr.
Eg: VL=VHx(NL/NH)
V=P/I

If current at lower side is increased, the voltage at lower
side will be decreased and also for the voltage at higher
side.To make the voltage at lower side stable, the turn
winding at higher side must be higher than it befor. When
the turn is chang it is mean the Tap is chang.

By Ohm Law:

P : Stable
I :→∞
V :→0
VL :constant,Low side Voltage(We need it be constang)
VH :constant,High side Voltage
NL :constant,Low side turn winding
NH :High side turn winding

we have an energy meter in a capacitor bank panel, So should we consider it's readings as energy consumption on daily basis. (when capacitor bank doesn't have any energy losses)

1922

---

can anybody tell me that for p.f. Improvment we use capacitor banks but how to decide its capacitance. As we all know how to calculate kvar but what abt capacitance value

1401

---

we are small scale industry in production of rice & rice bran. Pls let me know how to take contract demand for our industry.. (for information we have total 600.hp)

3471

---

How to Design green buildings services? What is the advantage to design green building?

1369

---

How we can change the direction of rotation of Induction motor? Prove it using graphical

1624

---

---

what are the components in electrical control panel (for example: 415V, 3-ph, panel to operate utility and 3-ph DG set).

1563

---

all details of DG UPS HVAC

1540

---

Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???

1556

---

HOW can i REuse the fused MLL LAMPS & GLS LAMPS at our factory

1428

---

We need to current density & short circuit calculation at 65kA for aluminium & copper busbar.

1256

---

why magnetising curve not start with zero voltage?

1845

---

WHICH SIZE A.B.CABLE IS USED FOR 11KV.

1759

---

How many capacitors using in LT panel as per Govt rules?

1510

---

Differentiate between Zero and Negative sequence current

1452

---

In HVDC LINE RECTIFIER CONTROL ON CONSTANT CURRENT AND INVERTER CONTROL CONSTANT EXITATION ANGLE CONTROL BUT HOW INVERTER CONTROL CONSTANT CURRENT?

1519

---