CATEGORIES SU CONTACTORS CONTACT Cart (0) CZECH

Contactors

A contactor is a device for switching or disconnecting an electrical connection. Contactors are used in      control circuits, eg as control contactors for medium power. Higher power equipment,      such as motors, are powered via power contactors.

Principle of contactors

Contactors and relays have a similar design, principle and characteristic parameters. When we bring it      voltage on the coil terminals, a magnetic field arises. The anchor with movable contacts is attracted.      The movable contacts are connected to the fixed contacts or interrupt the existing connections. For contactors      the main current contacts are switching. The auxiliary contacts are switching or expanding.      By changing the individual parts, such as a set of contacts or a coil, the contactor can be adjusted      for other voltages or equip other types of contacts. Contactors are divided into categories      by type of current and use. The relevant category must be indicated on the contactor.

Distribution of contactors

Depending on the application, we distinguish the contactors into power and auxiliary, depending on the type of switching current on      AC contactors and DC contactors. Inclusion in      use category makes it easy to choose the right contactor. The DC contactor is different      in a coil which is wound onto the magnetic core (hence does not have the electrical plates) which it has      north and south pole. The AC contactor has windings wound on the el. Sheets of the shape E and I.      When describing the contactor, the schematics and the actual contactors are called: A1, A2 -      control coil terminals; NO (Normaly Open) auxiliary switching contacts; NC (Normaly Closed)      auxiliary contacts.

DC contactors SU

The SU contactor is manufactured by Apen (now part of General Electric), which is a universal contactor for      jog AC and DC networks.

SU contactors are open contactors equipped with electromagnetic drive with Lp-5 forging coupling and electromagnetic discharge cavity. The SU contactor is equipped with an ŁP-4 auxiliary switch. The reciprocal positioning of the drive and contact systems allows for a minimum mounting surface, and the position of the jumper connection point in the axis of the main contact opening provides overall symmetry of the contact kinematics so that a combination of a normally open and normally closed contact is achieved.

Size Current Main configuration of contacts
  [A] 1z 2z 3z 4z 1r 1z+1r 2z+1r 2z+2r 3z+1r

0

40

SU-010

SU-020

SU-030

SU-040

SU-001

SU-011

SU-021

SU-022

SU-031

1

63

SU-110

SU-120

SU-130

SU-140

SU-101

SU-111

SU-121

SU-122

SU-131

2

100

SU-210

SU-220

SU-230

SU-240

SU-201

SU-211

SU-221

SU-222

SU-231

3

160

SU-310

SU-320

SU-330

SU-340

SU-301

SU-311

SU-321

SU-322

SU-331

4

250

SU-410

SU-420

SU-430

SU-440

SU-401

SU-411

SU-421

SU-422 

SU-431

5

400

SU-510

SU-520

SU-530

 

SU-501

SU-511

 

 

 

6

630

SU-610

SU-620

 

 

SU-601

SU-611

 

 

 

Designation of contactors SU

  • first digit - current size
  • second digit - number of main contacts
  • third digit - number of main contacts
  • the letter Tr (if given) - traction