Junction Boxes for Three-Phase Series-Resistance Heating Cables Connection

−60°C
+55°C

Features

  • Efficient solution for power supply to three-phase series-resistance heating cable LLS
  • All required component parts included in the scope of supply
  • Wide application range
Product Datasheet

Application Areas

Approved for installation in explosion hazard areas

Approvals

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.

  • Efficient solution for power supply to three-phase series-resistance heating cable LLS
  • All required component parts included in the scope of supply
  • Wide application range
  • Quick and easy installation
  • High thermal stability
  • Non-corrosive
Technical Data
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):
JB2221-544-21(60-64)
JB2221-544-2165
5.7 kg
4.8 kg
Material box Glass fiber reinforced polyester
Color Black