The control bracket adjustable Cam type CA, CA, CA, CA, CAA and CAA

The control bracket adjustable Cam type CA, CA, CA, CA, CAA and CAA
1. The purpose

The command devices are designed for automatic remote control of actuators as a travel limit switches that require particular accuracy and reliability management.

The structure and operation


The command devices consist of a case, the construction of which corresponds to a particular series controller, inside of which are gear, the Cam drum, the contact pad and the contact rail.
The operating position of the control bracket space: series KA, KA and CAA - horizontal mount horizontal base;
series KA vertical mount vertical;
series CA and CAA - vertical, mounted on a horizontal base;

The input conductors (cables) in the control bracket with protective cover, through the holes, and the waterproof performance - through seals (see Annex 1).

Mounting control bracket clamps allow attaching one copper or aluminum conductor cross-sections from 1.5 to 4 mm2 or two conductors with cross-section up to 2.5 mm2.

Drum Cam (Fig. 1) is a set of switching washers (4, 5 or 6 washers depending on the performance of the controller) POS. 1, the shaft POS.2. Each washer are off and tripping Cams POS. 3 and 4, respectively, of the contact rails and panels). While spinning the reels may be parallel and serial (see tab. 1).

Normally each washer dryer sets, one including and one which disables the fist. Allows you to install up to 3 including 3 tripping Cams, and the drum speed must be reduced so that the number of cycles "on-off" does not exceed 1800 per hour.

When setting up the chart of contact closures control bracket with non-reversing drive the distance along the chord between vertices enabling and disabling of Cams in the direction of rotation of the shaft of the drum control bracket must be at least 20 mm

Panel pin POS.5 is an insulating base, which strengthened the stationary contacts POS. 6 and 7.

Contact rail consists of a set of contact fingers POS. 8 with the movable contacts POS. 9, tripping levers Ref. 10 and springs POS. 11 and 12.

Including Cam POS. 4 during the rotation of the drum reaches the roller POS. 13, and by clicking on it, rotates the finger contact POS. 8. The movable contact POS. 9 closes the circuit. Tripping lever POS. 10 under the action of the spring POS.12 is cut finger contact POS. 8 and holds the latter in an enabled state.

Upon further rotation of the drum tripping Cam POS. 3 approaches the roller POS. 13 tripping lever POS. 10 and, by clicking on it, disables the past. This tripping lever POS. 10, leaving a cut finger contact POS. 8, frees the latter, which, turning under the action of the spring POS. 11 around its axis, opens the contacts POS. 6 and 7.

Note. Spin the reels in the control bracket series CA, CA, CA, CAA and CAA produced by the drive mechanism, which is controlled by these control bracket, the rotation of the drums in the control bracket series KA is produced from the direct current motor mounted directly on the housing of the controller.

Distinctive design features of each series control bracket shown in table. 1 and Annex 2.

Technical parameters


Technical data control bracket shown in tables 1, 2 and 3.

The symbol structure is given in Annex 1.

Contacts control bracket allow for a continuous load current of 16 a and short-term (up to 10) load current of 75 A.

The reliability of the control bracket is determined by switching the resistance specified in table. 2.

Overall and mounting dimensions control bracket shown in Appendix 2.

The control bracket is designed for use in control circuits DC and AC frequency 50 or 60 Hz, voltage up to 440 C.

The control bracket prednaznacheny to work in the zone of temperate climate ("Y") category 2 according to GOST 15150-69.

Protection of membranes from exposure to environmental control bracket series CA, CA and CA - R, and for CA, CAA and CAA - IR55 according to GOST 14255-69.

Limit of switching capacity of the control bracket is characterized by the ability to commutate 50 times any value of the currents listed in table. 3.

Switching endurance control bracket when the drum rotation speed of 30 rpm and the number of cycles "on-off" no more than 1800 per hour must match the value specified in the table. 2.

Mechanical wear resistance control bracket when working in the modes specified in paragraph 1.2.7, not less than 0,25x106 cycles "on / off", except for the control bracket series CA with gear ratio 1:1 and consecutive reels, for which mechanical wear resistance of not less than 0,16 106 cycles "on / off".

The control bracket is designed for reverse operation with the rotational speed of 30 rpm, when the number of cycles "on-off" no more than 1800 per hour. The mode control bracket long.

May be short-term (up to 5 min) working with drum speed up to 60 rpm when the total number of cycles "on-off" no more than 1800 per hour.

To disable one contact to the shaft of the drum must be applied torque value is not more than 4 Nm, to include not more than 5 Nm.

Porac installation and preparation for work


Before commissioning, each apparatus must