Answer / kj

They are the ratings of the contactor.

AC1 is for resistive loads and AC3 is for normal motor
loads. AC2 is for special conditions of motors.

Answer / pani

Relay types
Ac1-Noninductive loads (pf 0.95).
Ac2-Slip Ring Induction Motor.
Ac3-Squirrel Cage Induction Motor.

Answer / muttappa

AC1,is for resistive load and
AC2, is special conditions of motor
AC3,is for normal motor loads

Answer / nitin tyagi

AC-1 - This category applies to all AC loads where the power factor is more than 0.95. These are primarily non-inductive or slightly inductive loads, such as heating. Breaking the arc remains easy with minimal arcing and contact wear.

AC-3 - This category applies to squirrel cage motors with breaking during normal running of the motor.
On closing, the contactor makes the inrush current, which is about 5 to 7 times the rated full load current of the motor.
On opening, the contactor breaks the rated full load current of the motor.

Answer / abdul rehman khalid

This applies to all AC devices (loads) with a power factor of at least 0.95 (cos phi greater than or equal to 0.95). 
Example of use: resistive load, heating, distribution.
This applies to squirrel cage motors where breaking occurs while the motor is running. 
Example of use: all squirrel cage motors, lifts, escalators, conveyors, bucket elevators, compressors, pumps, mixers, air conditioning units, etc.

Answer / abdul rehman khalid

AC1..This applies to all AC devices (loads) with a power factor of at least 0.95 (cos phi greater than or equal to 0.95). 
Example of use: resistive load, heating, distribution.
AC2..This applies to squirrel cage motors where breaking occurs while the motor is running. 
Example of use: all squirrel cage motors, lifts, escalators, conveyors, bucket elevators, compressors, pumps, mixers, air conditioning units, etc.

Answer / vimal dobal

AC1, AC2, AC3..are like a normally auxallery contector. Use
to indirect operation of High reated power contractor.

how to identify the cable quality and what is flame proof cable

0 Answers  

How many input terminal of single phase transformer.which is use for rural power distribution.

1 Answers   RMSI,

What are the components of feedback control system?

0 Answers  

WHAT IS THE REASON FOR LOW VOLTAGE IN HOUSES?*

1 Answers  

diffrence between abcb and mocb

1 Answers   UltraTech,

How do you select a cable size(Cu&Al) for a particular load

10 Answers   Adhunik, BPCL Bharat Petroleum, Hiecon, TATA,

What are the transformer losses?

0 Answers  

Pls explain about full theory of salient pole generator?

1 Answers   Kirloskar,

what is megar healthy value for ht &lt cables

2 Answers  

my diploma certificate in my higher education college

0 Answers   Aastha Spintex,

IF I KNOW THE AREA OF CROSS SECTION OFTHE WIRE , WATTAGE OF THE LOAD ,VOLTAGE SUPPLY WHAT IM GIVING TO THE LOAD AND ALSO POWER FACTOR OF LOAD ....... SO GIVE ME FOR WHAT AMOUNT OF CURRENT I SHOULD USE WHICH TYPE OF CABLE?

0 Answers  

7. Why AC motors, AC bulbs etc... are donot operated by DC signals? and Why DC motors, DC bulbs etc... are donot operated by AC signals?

2 Answers   Bhel,