generally the resistance of armature is very small i.e in
term of .05ohm or like this.this is due to reduce the
losses.if the motor is connected direct supply high current
will flow and it may burn the armature winding.thats why
starter is connected between supply and motor which reduces
the starting current and provided smooth operation
Please Help Members By Posting Answers For Below Questions
calculate external resistance values to add to the rotor of
a slip ring induction motor. STATOR- 415 V, 3 phase delta,
1100 A, 50 Hz, 1490 rpm, pf 0,86 ROTOR - 660 V, 590 A, 50
Hz. STATOR current at each steps STEP1-600A,STEP2-
What should be setting for alarm,tripping and cooling fan
on for power transformer's oil temp. and winding temp.
what is relation between vector group of transformer and
its load hormonics?
ratings of lightning arrester
An ISP is granted a block of addresses starting with 188.8.131.52/16. The ISP wants to distribute these blocks to 2600 customers as follows.
a) 200 medium size businesses; each needs 16 addresses
b) 400 small businesses; each needs 8 addresses
c) 2000 households; each needs 4 addresses
Design the subblocks and give the slash notation for each subblock. Find out how many addresses are still available after these allocations.
How can get elongation of 2 k.G aluminium, if elongated aluminium dia is 2.5 mm?
Sir,In our company there are 3 caterpillar make(capacity:(1)
3.3KV,2.5MW(2)3.3KV,2.5MW & (3)3.3KV,1.9MW) & 1 deutz make
(capacity:11KV,3.8MW)gas engines utilised,all are running
There are three transformer utilised,(1)
6.25MVA,3.3KV/22KV,Impedence voltage:6.7% used for two
generator,both are 2.5MW(2)5.5MVA,3.3KV/22KV,Impedence
voltage:7.2% used for one generator of 2.5MW & (3)
5.5MVA,11KV/22KV,Impedence voltage:7.8% used for one
generator of 2.5MW.all generator breakers capacity of
Sir,I want the details of fault level calculation of
generator,transformer individually & for whole system.
If you require any information from me.feel free for
contact me sir.pl.send the answer of my question as the
earliest as possible.
what is servo motor and how it works?
What is online and offline ups? how does it works?
Iin ESP why positive is grounded ? why not negative ?
what is current check gurd relay?
WHY THREE PHESE SYSTEM VOLTAGE APPLIED IN 440 VOLT
why Current is lead 90 degree and voltage is lag 90 degree
in a capacitor.?
why Current is lag 90 degree and voltage is lead 90 degree
in an inductor.?
Why squirrel cage motor can only use with low starting loads ?
Actuality I have at home electrical panel with 220v 50hz, and I want to converter from there to 110v 60hz, to wiring on the half of my house. Also I like to keep another half of my house with the original 220v 50hz. What is the best and safety way to do?