Answer / simpal

squirrel cage induction motor with relatively low resistence
is used 4 fans,most machinary tools,centrifugal pumps,wood
working tool,cage induction motor relatively high resistence
is used 4 crusher,compressor,reciprocating pump, and cage
motor with high resistence is 4 punching presses, shears,
hoists n elevator.wound rotor im is used load requiring
severe starting condition or for load requiring speed
control they r also used 4 hoists,copresser n elevator

Answer / gaurav patidar

Induction motors are used in thermal power plants in
ID,FD,PA fans.Also in the boiler feed water pump and for
coal mills.

Answer / patel ronak r

INDUCTION MOTOR IS USED FOR HEAVY RESISTANCE MACHINERY.
LIKE CENTRIFUGAL PUMP,HIGH GEAR PUMP, CRUSHER
PULVERISER,AND SOME HEAVY ROTATING PARTS LIKES IN CHEMICAL
COMPANY MANY OF THE BIG RACTOR SO IT'S AGITATOR ROTATING
THIS TYPE OF INDUCTION MOTOR USED. BECAUSE IT'S EFFIENCY IS
VERY HIGH.AND IT'S LOSSES LOW.RESISTANCE OF INDUCTION MOTOR
IS VERY HIGH.

Answer / navneet phogat

Three phase induction motors are used wherever the application depends on AC power from the national grid. Because they don't need commutators they are particularly suitable for high power applications.
They are available with power handling capacities ranging from a few Watts to more than 10 MegaWatts.
They are mainly used for heavy industrial applications and for machine tools.
The availability of solid state inverters in recent years means that induction motors can now be run from a DC source. They are now finding use in automotive applications for electric and hybrid electric vehicles. Induction motors are seen as more rugged for these applications than permanent magnet motors which are vulnerable to possible degradation or demagnetization of the magnets due to over-temperature or accidental over-current at power levels over about 5 kW. Nevertheless, the induction motor can be ill-suited for some automotive applications because of the difficulties associated with extracting heat from the rotor, efficiency problems over wide speed and power ranges, and a more expensive manufacturing process due to distributed windings. Permanent magnet and reluctance motors may offer better solutions for these applications.

Answer / kumaravel

its can be used below rated speed

Answer / vinod

1)maintanenece free
2)four quadrant operatoin in possible
3)reduced losses

how can I check HT cable ?

2 Answers  

how moving coil indicator works?

1 Answers  

may anybody tell me the names of institute where plc programing course are conducted

1 Answers  

How do you maintain the batteries for generators, what is the daily maintenance of a generator?

2 Answers   Jindal,

What is SF6 Circuit Breaker?

2 Answers   Amdocs,

The company is wiling to buy you 5 pcs of equipments in your electrical tool kit. Plz tell what are the 5 things you want?

3 Answers  

what is mean by kneepoint voltage? when it will happen? ( my doubt is, if CT secondary is open means ct get saturation or blas? what are factors are required for calculations? plz give currect anws:

0 Answers  

IP55 protection stands for

1 Answers   Hofincons,

Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example?

0 Answers  

What is the normal phase difference between the voltage and the no-load current in a transformer?

0 Answers  

On load tap changer (OLTC) explode? Transformer Vector group: Ynd11 Rated Power: 353MVA Rated Current: 693A Voltage:294/20KV OLTC Type: T III Y1000 110/c 12193w Max Operation Current: 295A Step Voltage: 550V Arrangement in Tx windings: Y Connection Problem: Damage of Unit 1 Generator Transformer On Load Tap Changer (OLTC) Description of Incident: 9.00 a.m. :- Generator No Load test on excitation system started 10.30 a.m :- Carried out AVR change over test 11.30 a.m :- Preparation for Generator Manual Synchronizing test 12.00 a.m :- Manual Synshronizing test started. Observed incoming generator voltage higher than running voltage. CECR operator operated Generator Transformer OLTC to bring down the incoming generator voltage 12.03 a.m :-Generator Transformer abnormal alarm operated at Gen.Control Desk (CECR) CECR operater at Generator transformer bay informed that the transformer oil splashed out from OLTC. CECR operater informed that he heard explosion inside OLTC. Observed Oil level & Oil Flow alaram operated at Tranformer local annunciator. 12.05 am :- CECR operator 'Open Gen Field Breaker” 12.10 a.m. :- Elec1 team inspected the OLTC and found the OLTC rupture disk was broken and oil spilled at OLTC area. - Elec1 found the OLTC top cover bulging. Do anyone know why and possibility cause happen in this OLTC.

9 Answers  

What is the stander resistance value between the neutral and earth?

10 Answers   Crossdomain, Sepco,