Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Single phase transformer

Status
Not open for further replies.

emperror123

Member level 5
Joined
Dec 11, 2010
Messages
86
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
1,880
to all,
i were facing a problem on single phase transformer on calculation part.
i been sketches out the single phase transformer equivalent circuit.
and some information given
f = 60hz
s = 20kVA
V1 = 2400v
V2 = 240v
R1 = 3Ω
R2 = 0.03Ω
X1 = 6.5Ω
X2 = 0.07Ω
Xm = 15kΩ
Rc = 100kΩ
lagging P.F. = 0.8

and here the problem come. i were trying to solve the problem.
which is
i got Xeq1 = R1 + a^2R2 = 13.5Ω, and Req1 = X1 +a^2X2 = 6Ω
i got primary voltage is V1 = 2400V and V2' = aV2 = 2400V
how do i calculate the primary current and secondary current?
and also the source voltage.

thank you and much appreciate with your help to solve the problem
 

srizbf

Advanced Member level 5
Joined
Apr 3, 2010
Messages
1,995
Helped
417
Reputation
840
Reaction score
328
Trophy points
1,363
Activity points
10,985
...i got Xeq1 = R1 + a^2R2 = 13.5Ω, and Req1 = X1 +a^2X2 = 6Ω...

should be as?

Req1 = R1 + a^2R2 = 13.5Ω, and Xeq1 = X1 +a^2X2 = 6Ω

is it ?
 

emperror123

Member level 5
Joined
Dec 11, 2010
Messages
86
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
1,880
SRIZBF:
sorry, is a typo error. shud be the same as u say

atripathi:
shall i need to include Xm and Rc into the formula to calculate the Ip or Is?
the source voltage got any formula?
 

atripathi

Advanced Member level 1
Joined
Dec 2, 2009
Messages
452
Helped
91
Reputation
182
Reaction score
88
Trophy points
1,318
Location
INDIA
Activity points
3,818
I would assume Source Voltage as 2400V (equal to V1, in specifications mentioned by you)
Yes, you need to include Xm & Rc into current calculations Ip. Ip=Io + Secondary (or load ) current reflected in primary; here Ip is current drawn from source
 

emperror123

Member level 5
Joined
Dec 11, 2010
Messages
86
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
1,880
how could i get voltage load, it do not gave any resistance load in circuits
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
47,455
Helped
14,040
Reputation
28,333
Reaction score
12,691
Trophy points
1,393
Location
Bochum, Germany
Activity points
275,990
how could i get voltage load, it do not gave any resistance load in circuits
You didn't tell the exact exercise text, but you're asking for a secondary current, so there should be a load, isn't it? The only hint for the load I found is the P.F. number, but I think you'll need more information about the load, I think.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top