Contactor Rating Per Pole

A general purpose motor control contactor may be suitable for heavy starting duty on large motors.

Contactor rating per pole. Nema and discussed the basics of a motor starter today we re going to talk about selecting a contactor for your application requirements. In previous blog posts we talked about the differences between iec vs. You will notice that the res resistive load rating is higher than the fla full load amperage rating and much lower than the lra locked rotor amperage rating. 7 5kw 10hp three phase squirrel cage induction motor 415 volts 50hz 1450rpm the efficiency of the motor.

Home about us news how to select and size an iec contactor. Replace underscore in catalog number with coil suffix letter from the table above. Mechanically linked per iec three pole contactors 9 to 150a iec ac3 duty 5 to 75hp 480v 7 5 to 100hp 600v ul csa four pole contactors 25 to 165a in ac1 duty power factor correction contactors 7 5 to 100kvar at 400v iec 9 to 110kvar at 480v ul csa types with 2no 2nc or 4nc main power poles. So called definite purpose contactors are carefully adapted to such.

3 bulk pack quantities are available in quantities of 50 contact local sales office. Datasheet in the datasheet it says that for ac 3 loads 1 the rated operational current ie is 32 a and 2 the motor power rating is 7 5 kw at 220 230 v. Posted october 23 2017 by springercontrols. Are three phase contactors rated per pole or in total.

Contactors are tested by underwriters laboratory ul using test procedure ul508 which specifies a maximum horsepower rating for which a contactor can be used. 15 360a contactor ratings. How to select and size an iec contactor. Let us calculate the contactor and overload rating for dol starter of the following motor.

Example dol starter calculation. 1 rating per pole. For example have a look at this datasheet for a random three phase contactor. Coil line contact rating per pole part style voltage volts fla lra resistive number contactor cross reference 1 95 catalog 057102200 page 13 220 240 40 200 220 480 25 150 350a224h09 13 a 220 600 18 90 2 75 3 31 13 a four pole contactors.

Some carry multiple ratings. A general purpose motor control contactor may be suitable for heavy starting duty on large motors. So called definite purpose contactors are carefully adapted to such applications as air. All siemens contactors are rated in accordance with at least one of the previous organizations test procedures.

For example siemens nema starters meet or. Contactors are rated by designed load current per contact pole maximum fault withstand current duty cycle design life expectancy voltage and coil voltage. 2 incomplete catalog number.