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).

What do the numbers on a contactor mean?

These auxiliary contacts (also called control contacts) each have an order number and a function number. The first number is used consecutively (order number) and the second number specifies the type of contact (function number).

How do I choose a contactor?

When selecting a contactor, please make sure that the contactor’s rated current is specified for the AC-3 load type. Ensure that you are looking at the right table. You can see the rated current for the AC-3 load is lower than the rated current for the AC-1 load.

How is star delta starter contactor rating calculated?

Main & Star-delta contactor calculation

Main contactor rating = 58%X Full Load Line Current = 7.96A.
Delta contactor rating = 58%X Full Load Line Current = 7.96A.
Star contactor rating = 33%X Full Load Line Current = 4.53A.

How is motor current rating calculated?

“Now the formula,which you know, KWH = Line Current * Line Voltage * Power factor can be applied. The only unknown value ‘current’ can be calculated.” You must not use de time, as P= dW/dt, the correct is kW = Line Current * 1,73*Line Voltage * Power factor * efficiency.

What is 13 and 14 on a contactor?

Many contactor manufacturers use the designations A1 and A2 for the terminals that connect power to the magnetic coil. Likewise, many manufacturers use the designations 13 and 14 for the terminals of normally open auxiliary contacts. Auxiliary contacts are operated by the magnetic coil just like the main contacts.

What is AC2 contactor?

AC-2: These are used in slip-ring motors starters such as Switching on and switching off the motor. AC-3: These types of contactors are generally preferred for the starting of Squirrel-cage motors, and switches off motor during the running time which means the contactor can withstand high current continuously. Example.

What are the amperage ratings for a contactor?

The switching devices handling current rating more than 15 amps are called contactors.

Where can I buy reliable L contactors?

Industrybuying.com brings to you a wide range of reliable L contactor at affordable prices. If you are looking to avail best prices on your order]

Why choose L switchgear contactors?

The comprehensive range of contactors from L Switchgear is your key to meet every demand and suit every requirement across diverse applications.

How are contactors and motor starters rated?

Contactor and Starter Ratings Contactors and motor starters are rated according to size andtype of load they are designed to handle.

What are the motor protection relays offered by L?

L also offers range of microcontroller based Motor protection relays to cater to various customer requirements. MPR300 – a Mini Motor protection relay with inbuilt CT’s is an economical solution for protection of Motors up to 50kW.