How is contactor rating calculated?

How is contactor rating calculated?

Making/Breaking Capacity of Contactor=1.5×13= 19 Amp. Size of Star Contactor (Starting Condition) = 33%X Full Load Current (Line). Size of Star Contactor =33%x13 = 4 Amp. Size of Main Contactor (Starting-Transition-Running) = 58%X Full Load Current (Line).

How do I choose a magnetic contactor?

Power contactors have 3 poles or 4 poles versions. You should select the suitable contactor according to the number of phases of the load. For example, if you want to control a 3 phase motor, you should use 3 pole contactor. If you want to disconnect the neutral, your choice should be 4 pole version.

What is contactor rating?

Ratings. Contactors are rated by designed load current per contact (pole), maximum fault withstand current, duty cycle, design life expectancy, voltage, and coil voltage.

Can you oversize a contactor?

A contactor is a glorified switch and the ratings are for its own function. You want to avoid under-sizing a contactor, but you can oversize.

What is AC1 and AC3 rating of contactor?

The difference between AC1 and AC3 contactors is AC1 contactors are used for general purpose resistive loads but AC3 contactors are used for high inductive, squirrel cage motor switching. The rating of AC3 is lower than AC1.

What are the amperage ratings for a contactor?

Devices switching more than 15 amperes or in circuits rated more than a few kilowatts are usually called contactors.

What does res mean on a contactor?

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. So, the contactor above would be sufficient to control/switch a 40 amp full load INDUCTIVE load and a 50 amp RESISTIVE load.

How many ohms should a contactor have?

The meter should read from 10 to 100 ohms. If the meter does not, the coil is bad and must be replaced.

How many metasol contactor suppliers are there?

A wide variety of metasol contactor options are available to you, There are 13 metasol contactor suppliers, mainly located in Asia. The top supplying country or region is China, which supply 100% of metasol contactor respectively. Metasol contactor products are most popular in United States, India, and Philippines.

Why choose metasol LS MC series?

In order to emphasize its durability as an industrial device, Metasol LS MC series adopt simple design form and sophisticated shape applying diamond cut concepts on product surface.

What is the rated voltage of the mc-100a 3-pole contactor?

LS Metasol MC-100a 3-pole contactor rated for 40 H.P. @ 230 volt, 75 H.P. @ 460 volt 3 phase and has an AC rated coil ( specify coil voltage above ).

What is the AC3 rating of the LS MEC mini contactors?

LS MEC Mini Contactors and Overloads Part no. 415kw at 415V at 415V contacts Rating AC3 rating AC1 rating Auxiliary GMC-6M-10 2.2 6 20 1 N/O GMC-6M-01 2.2 6 20 1 N/C GMC-9M-10 4 9 20 1 N/O GMC-9M-01 4 9 20 1 N/C GMC-12M-10 5.5 12 20 1 N/O GMC-12M-01 5.5 12 20 1 N/C GMC-16M-10 7.5 16 20 1 N/O