Approved for installation in explosion hazard areas
Boxes JB2221-544-21(60-64) and JB2221-544-2165 allow to connect heating sections based on a three-phase series-resistance heating cable with each other and with a power cable in explosion hazard areas.
The enclosure design ensures moisture and dust ingress protection IP66 and high corrosion stability.
The box can be mounted onto a nearby metal structure or using a bracket directly onto the pipeline. Depending on the purpose, the boxes are classified into power connection boxes (for connecting the heating section to a source of power), maintenance boxes (for connecting two strings of the heating section) and terminal boxes (for connecting the heating section at the heating stretch termination).
The cable gland of the box JB2221-544-21(60-64) is intended for connecting armored cable with a diameter of 23.5 to 33.6 mm. The box allows the connection of one section using the star or loop configuration. For conveniently connecting heating sections and power cables and orienting the box at the connection point, the box has an opening on each side sealed by a plug.
JB2221-544-2165 is intended for connecting armored cable with a diameter from 17 to 26.3 mm. The box allows connection of one section using the star configuration. For conveniently connecting heating sections and power cables and orienting the box at the connection point, the box has an opening on each side sealed by a plug.
The installed terminal blocks allow the connection of multi-core or single-core wires with a cross-section of 2.5 to 35 mm2.
|Dust and moisture protection rating||IP66|
|Explosion protection marking||
Ех еb IIC Т6...Т3 Gb |
Ex tb IIIC T85°C... T165°C Db
|Temperature group of the explosion hazard area||T6|
|Operating ambient temperature range||−60 ... +55 °С|
|Operating voltage||max 750 V|
|Operating current||max 109 A|
|Enclosure dimensions||250×255×120 mm|
|Total weight (maximum): |
|Material box||Glass fiber reinforced polyester|