Answer / raviteja

220V/50HZ - indian standard of supply
120v/60HZ - american standard of supply

Answer / umar

220V/50Hz system is used in india and Pakistan while
120V/60Hz is used in KSA and USA.

The advantage of 120V over 220V is human safety factor i.e.
less insulation required and less danger of electric shock
but it has the disadvantage that the initial cost increases.

Also size of electric equipment reduces with increase in
frequency such transformers etc.

Answer / rk

both are /incorrect standard there is british and american
stanadard india is following british std.

Answer / mohit

WHEN WE USED 220 50 HZ SUPPLY WE CAN USE THIN ELECTRICAL
WIRES BUT FOR 120V 60 HZ SUPPLY WE NEED THICK WIRES.RICH
COUNTRU CAN PAY FOR 120V 60HZ AND SHOCK RATE IN CASE OF
120V IS LESS THAN 220V .HENCE FOR PERSONAL SAFETY REASONS
AND RICH , US. ETC ARE USING 220C 50HZ SUPPLY.

Answer / ali raza

220v/50 Hz is economic as thin conductor is required
usually pakistan and india use this as it is a British standard however it is more dangerous than 120v/60 Hz which is american standard and expensive as thick conductor is required
by ali raza electrical engineer(power)lahore pakistan

Answer / bilal ahmad

Basicaly Pakistan, Uk, Europ are using 50hz and have
advantage less losses in reactive and easy transmission on
high voltage and disadvantade is large size of machine and
USA,KSA have 60 hz have advantage of smal size of machine
mean low coast and disadvantage is more losses in reactve
lose and low level of transmition
but both system have some advantage and disadvantage and
both area are try to improve their disadvantage to suite
the system for future

Answer / saravana kumar s

Ok 220v 50hz supply is economical then why americans are going for 120 60hz.

Answer / prasad joshianwikar

220V/50HZ - less frequency of sine wave propogation has
large distacve between alternation of current between Phase
& Neutral and gives 220V at Phase to Neutral on 50Hz
Frequency. simply lenthy propogation with higher voltage.
(Depends upon the LT Power transformer output)

120v/60HZ - High frequency of sine wave propogation has
less distacve between alternation of current between Phase
& Neutral and gives 120V at Phase to Neutral on 60Hz
Frequency.simply fast propogation with lower voltage.
(Depends upon the LT Power transformer output)

What do you meant by soft start?

1 Answers  

Ceiling fan motor wiring Hi, I have 2 ceiling fans broken. The receiver/control units burned out due to lightening. One Harbor Breeze and one Hunter's I took them apart (remove receiver units). Now on both of the motor I see 4 wires coming out from each motor I really want to know the function of each wire. Are there anyway I can test to see which is which? After searching forums I know these 4 wires are from 2 sets of coils inside the motor, one is Start winding and the other is Runing winding I could not find the receiver/control unit any where, so I am planing to buy Capacitors and universal remote controls to make the fans run again. Anyone has any idea how to do the wiring, please help Thnks

1 Answers  

will the introduction of capacitor bank parallel with the induction load reduce power consumption

4 Answers   Nokia, WAPDA Water and Power Development Authority,

why so voltage is same in parallel circuits and current is same in series ckt?

3 Answers  

DOES A MAGNETIC CIRCUIT CONSUMES ENERGY? IF YES, WHY?

6 Answers  

what is the diff. b/w restricted earth fault relay & standby earthfault relay and where they are used?

4 Answers   KSK Energy, Reliance,

kindly tell me how the load on generator increase by just increasing the fuel of prime mover, as if for exampple 20 MW gen set is synchronized the load ramps from zero to 20 MW gradully and during this procress only fuel of prime mover increases. Which thing determines the load on generator with respect to fuel

4 Answers   Birla,

What is auto transformer?

7 Answers   L&T,

Why reactors use before incoming of ac vvfd drive?

0 Answers  

What is SFU ?

4 Answers  

In pakistan appliances work on 220v at 50hz and in us appliances work on 110v at 60hz what is basic theory to explain it

1 Answers   SNGPL,

How to apply 'c' license and also explain what is difference between 'c' and 'b'license.i am also working in one of the private company.i have finished my diploma in 2014 .i have already finished in ITI electrician course.....

0 Answers