Ex db Electrical Choke Panels for Hazardous Area Applications

Power line communication systems inject and transmit high frequency communication signals over high voltage power lines. Within the system, each panel combines a choke and coupling capacitor in a single Ex db enclosure. The capacitor couples the communication equipment to the high voltage line while isolating it from the power frequency voltage, and the choke manages the high frequency signal path, allowing the two to operate together on the same conductor.

Manufactured to strict project and certification requirements, the assemblies combine robust flameproof protection with high voltage capability and offshore-ready construction, reflecting JCE’s ongoing partnership with the client

The client required panels that could house specialist high voltage equipment while meeting the requirements of their hazardous area installations. Integrating both the choke and coupling capacitor within a single flameproof enclosure meant maintaining the necessary electrical clearances and creepage distances while achieving the T6 temperature class and IP66 ingress protection.

As order quantities grew across successive projects, the client also needed every unit built, tested and certified to the same consistent specification.

JCE provided a complete manufacturing and engineering scope covering the machining, assembly, wiring, testing and certification of the Ex db electrical choke panels, ultimately delivering over 50 units across the various projects.

The combined project scope included:

• 50 x Ex db IIB T6 Gb IP66 assemblies delivered across multiple projects
• High voltage testing and certification
• Custom machining, assembly and wiring
• Stainless steel barrier glands and Ex db accessories
• Conduit, high voltage cable and installation hardware supply
• ECAS certification support

Rated Ex db IIB T6 Gb with IP66 ingress protection, the units combine hazardous area certification with construction designed to withstand offshore and production environments throughout their service life.

Each assembly was finished in BS 4800 10A03 grey to the client’s coating specification, ensuring a consistent finish across the full fleet.

From fabrication and assembly through to testing and QA/QC, JCE delivered over 50 Choke Panels to a consistent standard across multiple projects. The work demonstrates JCE’s ability to integrate specialist high voltage equipment within certified Ex assemblies, and to apply the same engineering, manufacturing and quality principles at scale.