Button elements KN-BKV

Purpose

The button element is intended for remote control of electric drives of machines and mechanisms in mobile and stationary plants, as well as for signaling associated with the specified electric drives or other electrical devices for the domestic market and for export.

Buttons are intended for integration into group I and II explosionproof electrical equipment

Features

• Buttons KN-BKV are instantaneous switching elements, whose proper actuation time is not more than 0.04 s.
• The possibility to manufacture with various groups of contacts: 1NO+1NC or 2NO or 2NC.

Design

Blocks BKV-1 and BKV-2 are used as a switching device. The block is made with explosion protection type “explosionproof enclosure” and protection type “е” and has single explosion protection marking ExdeIU/ExdeIICU.

Buttons used in electrical equipment and groups are used in electric circuits of alternating current with frequency 50–60 Hz, voltage up to 660 V and in direct current circuits with voltage of 110 V with nominal current of 16 A.

Buttons used in group II electrical equipment are used in alternating current circuits with frequency of 50–60 Hz and voltage up to 660 V for area 1 and up to 380 V for area 2, direct current circuits with voltage up to 440 V for area 1 and up to 220 V for area 2 with nominal current of 16 A.

KN-BKV – Х1 Х2 – Х3 Х4 Х5 – V2 Х6

KN-BKV – push button on the basis of explosionproof contact block BKV

Х1 – number of BKV overall dimension:

     1 – block of the first overall dimension (2 bridges): 1NC+1NO, 2NC and 2NO

     2 – block of the second overall dimension (1 bridge): 1NO+1NC

Х2 – version of used BKV:

     1 – without bushing. Index must not be indicated

     2 – with bushing ensuring explosion protection when arranged on the wall or cover of the product

Х3 – functional purpose:

     Ts – cylindrical button “Start”

     G – mushroom button “Stop”

Х4 – colour of button:

   for “Stop” button:

       Bl – black

       B – blue

       G – green

       Y – yellow

       R – red

   for “Stop” button:

       R – red

       G – green

       B – blue

       Bl – black

Х5 – availability of locking:

     0 – without locking;

     1 – with forced locking (only for “Stop” button).

В2 – climatic version and arrangement category according to GOST 15150.

Х6 – additional conditions* for BKV-1 according to method of contact operation:

     1 – for 2NO (two normally open contacts)

     2 – for 2NC (two normally closed contacts)

*Note: for basic versions of blocks (1NC+1NO) – figures are not indicated.

Example of order forming:

KN-BKV-2-TsS0-V2

That corresponds to:

Button element (“Start” button) based on the blue-coloured explosionproof contact block of type BKV-21 V2, without self-locking, with climatic version and arrangement category V2.

Explosion protection marking: ExdeIU/ExdeIICU

Nominal voltage:

     alternating current (50 or 60 Hz) up to 660 V

     direct current up to 440 V

Nominal current: up to 16 A

Cross-section of connected cable cores:

     with simultaneous connection of two wires up to 2.5 mm²

     with simultaneous connection of one wire up to 4.0 mm²

Climatic version and arrangement category: V2

Operation temperature: from -60 °C to +55 °C

Level of dust and moisture protection: IР00 (the product is intended for integration into the enclosure of another product)

Overall and connection dimensions