Project Description

3TF ac contactor

Introduction

AC contactor is widely used in power transmission system. Applicable to long-distance frequent switching on and switching end DC main circuit and large capacity control circuit in, it main control object is all motor, and can also be used for electric welder control, capacitor banks, and the electric heating device, lighting equipment and other loads. For example, power industry, industrial and mining enterprises, iron and steel plants, and some large power will use it. Can also cooperate with the fuse, the dynamic air circuit breaker, thermal relay and other electrical use, in order to better protect the line current.

An air conditioning unit is a complex system of electronic components that must work together so that your AC system can run at the right times.

Why do we need to use AC contactor?

We live around a lot of large equipment to start the knife gate will have a spark, arc, will have a security risk, if it is safe to contact the remote control is much more safe.

AC contactor is widely used in power transmission system. Applicable to long-distance frequent switching on and switching end DC main circuit and large capacity control circuit in, it main control object is all motor, and can also be used for electric welder control, capacitor banks, and the electric heating device, lighting equipment and other loads. For example, power industry, industrial and mining enterprises, iron and steel plants, and some large power will use it. Can also cooperate with the fuse, the dynamic air circuit breaker, thermal relay and other electrical use, in order to better protect the line current.

Its advantages: it has a large number of control, the action is rapid, safe and easy operation, etc., and has the function of under voltage release, the application is very extensive in industrial and agricultural production. Simple wiring. The contact point of the AC contactor is made of silver tungsten alloy, which has good electrical conductivity and high temperature resistance. Can prolong the service life of the switch, protect the electric equipment.

Type Rated thermal current(A) rated operation
current(A)
Controllable power of motor(KW) Type of
Auxiliary
contact
AC-3 AC-4
380V 660V 380V 660V 380V 660V
3TF30 20 9 7 4 5.5 1.4 2.4 NO
NC
1NO+1NC
2NO+2NC
3TF31 20 12 8.5 5.5 7.5 1.9 3.3
3TF32 30 196 12.5 7.5 11 3.5 6
3TF33 30 22 16.5 10 15 4 6.6
3TF34 55 32 24 15 22 7.5 13
3TF35 55 38 30 18.5 22 9 15.5
3TF40 20 9 7 4 5.5 11.4 2.4
3TF41 20 12 8.5 5.5 7.5 1.9 3.3
3TF42 30 16 12.5 7.5 11 3.5 6
3TF43 30 22 16.5 10 15 4 6.6
3TF44 55 32 24 15 22 7.5 13
3TF45 55 38 30 18.5 22 9 15.5
3TF46 800 45 40 22 37 12 20.8 2NC+2NO
2NC+4NO
3TF47 80 63 60 30 55 14 24.3
3TF48 100 75 60 37 55 17 29.5
3TF49 100 85 80 45 75 21 36
3TF50 160 110 95 55 90 27 46.9
3TF51 160 140 120 75 110 35 60
3TF52 300 170 160 90 150 38 66
3TF53 210 205 165 110 160 50 86
3TF54 300 250 230 132 220 58 100
3TF55 300 300 260 160 250 66 114
3TF56 400 400 380 200 350 81 140
3TF68 630 630 600 335 560 160 278

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contactor AC Contactor Catalogue
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