66kV Junction Boxes & Electrical Enclosures
66kv junction box | junction box & enclosure
Product Reference Range: 6SJB883 0-2
The 66kV High Voltage Enclosure is designed for harsh offshore and marine environments, supporting applications such as wind farms and offshore platforms. It houses compact, highly insulated tee connectors rated up to 72.5kV and provides full protection against partial discharge, with 100% AC withstand fault testing for proven reliability.
Built from 2mm 316L stainless steel with 3mm gland plates and a silicone gasket, the enclosure meets IP66/67 and DTS-01 deluge standards. For more options in robust electrical protection, see our range of HV enclosures and junction boxes.
GO TO DOWNLOADS66kv junction box & enclosures Overview
The 66kV high-voltage enclosure is engineered for demanding offshore and hazardous environments, supporting increased voltage requirements such as those found in wind farms and offshore platforms. Designed for compact, highly insulated tee connectors up to 72.5kV, it accommodates multiple conductors and ensures full protection against partial discharge, with proven reliability through 100% AC withstand testing.
Contact our experienced team to discuss your requirements or request a quotation for the 66kV Junction Boxes & Enclosures. Thorne & Derrick International, based in the UK, are trusted suppliers providing expert technical advice and worldwide delivery.
 Technical Specifications
Key junction box & enclosure Benefits
✔ Heavy-duty 2mm 316L stainless-steel enclosure with 3mm stainless-steel gland plates
✔ Rated up to 66kV (72.5kV maximum) with compact, highly insulated tee connectors
✔ Fully tested for 100% AC withstand and complete protection against partial discharge
✔ DTS-01 deluge tested / IP66–IP67 environmental protection
✔ Suitable for offshore hazardous locations with Ex-rated version available
✔ Supports cable sizes up to 1200mm² with up to four conductors per phase in and out
✔ Features separate, lockable compartments for independent subsea and topside terminations
✔ Designed for demanding offshore wind, marine, and platform applications requiring high-voltage distribution
junction box — Part References & Dimensions
abtech
Thorne & Derrick are a specialist distributor of ABTECH hazardous area enclosures and HV junction boxes, providing expert technical support, competitive pricing and fast worldwide delivery across the full ABTECH product portfolio.
The ABTECH HVJB, ABJB and 4TJB product ranges include specialist 11kV and 33kV high-voltage junction boxes, designed for safe power distribution in Zone 1 and Zone 21 hazardous areas. These stainless-steel enclosures support applications such as power transmission, umbilical systems, pumps, instrumentation and control circuits. All products are certified to ATEX, IECEx and UKCA standards to ensure compliant installation in potentially explosive atmospheres.
Each product range supports specific use cases, from 11kV and 33kV industrial distribution through to 66kV grid infrastructure, high-current busbar systems up to 3000A and submersible or fibre-integrated enclosures for offshore and specialist applications. Direct links are provided to detailed product pages for full technical specifications and compliance information.
| Voltage Range | Typical Applications | Enclosure Type | Product Range |
|---|---|---|---|
| 11kV – 33kV | Power generation, industrial distribution, utilities, hazardous areas | 11kV & 33kV HV Junction Boxes |  |
| These high-voltage electrical enclosures provide secure termination and interconnection of medium-to-high voltage cables while maintaining electrical safety, ingress protection and long-term durability in harsh operating environments. | |||
| 11kV | Modular power distribution & busbar segregation | HV High-Voltage Busbar Box |  |
| Designed for high-current power distribution where multiple feeders or connections are required within a compact enclosure. These solutions support controlled power routing, fault containment and efficient maintenance access in substations and industrial facilities. | |||
| Up to 45kV | High-current distribution, heavy industrial processes, power plants | High-Power 3kA HV Junction Boxes |  |
| Designed for extreme electrical loads, high-power HV junction boxes support currents up to 3000A (3kA). These enclosures are typically specified for heavy industrial processes, power generation plants and specialist distribution systems where thermal management and fault rating are critical. |
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| Subsea / Submersible | Offshore energy, marine systems, subsea cable termination | Submersible HV Electrical Enclosures |  |
| Submersible electrical enclosures are designed for underwater and subsea cable termination, offering long-term sealing, corrosion resistance and pressure tolerance. These solutions are ideal for offshore energy, marine infrastructure and subsea power distribution systems. |
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| Fibre Optic Integration | Data transmission, monitoring, control & communications | Fibre Optic Termination Enclosures |  |
| Fibre optic termination enclosures provide secure housing for optical fibre connections within HV and industrial networks. These enclosures protect sensitive fibre systems while supporting data, monitoring and communication integration alongside power infrastructure. |
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66kV Junction Boxes & Electrical Enclosures – DatasheetDownload
