Junction Boxes for Series-Resistance Cables

−60°C
+55°C

Features

  • Efficient solution for power supply and input of SNF and TMF series-resistance heating cables
  • Compatible with cable types SNF and TMF
  • Designed for loop, star and delta connection
Product Datasheet

Application Areas

Approved for installation in explosion hazard areas

Approvals

Junction boxes are designed for connecting of series-resistance heating cables, such as SNF and TMF, to power network.

Boxes’ models are supplied in 2 installation variants:

  • complete with a pipe installation support stand (UVK) for direct mounting onto the surface of a pipeline or tank;
  • for installation onto a wall, onto a nearby metal structure or using a bracket directly onto the pipeline (bracket supplied separately).

The enclosure design ensures moisture and dust ingress protection IP66 and high corrosion stability. Cable glands of the box are intended for connecting unarmored power cables with a diameter of 7 to 18 mm or armored power cables with a diameter of 12 to 20 mm.

The installed terminal blocks allow the connection of multi-core or single-core wires with a cross-section of 1.5 to 10 mm2 (JB2221-223 models) or up to 16 mm2 (JB2221-333, JB2221-533 models). Design options with screw or spring terminal straps are available to order.

  • Efficient solution for power supply and input of SNF and TMF series-resistance heating cables
  • Compatible with cable types SNF and TMF
  • Designed for loop, star and delta connection
  • Excludes the risk of damage to the heating cables at the connection points
  • 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:
JB2221-223
JB2221-333, JB2221-533
max 550 V
max 750 V
Operating current:
JB2221-223
JB2221-333, JB2221-533
max 50 A
max 66 A
Enclosure dimensions:
JB2221-223
JB2221-333
JB2221-533
122×120×91.5 mm
160×160×94.5 mm
260×160×90 mm
Total weight (maximum):
JB2221-223
JB2221-333
JB2221-533
1.35 kg
2.26 kg
2.30 kg
Material Box / Color Glass fiber reinforced polyester / Black
Material Pipe installation support / Color Glass fiber reinforced polyester / Black