11kV 33kV Junction Boxes & Electrical Enclosures

11kV 33kV Junction Boxes & Electrical Enclosures

Product Codes: ABTECH HVJB, HVJB125, ABJB, ABJB125, 4TJB & 4TJB125

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ABTECH’s high voltage junction boxes and electrical enclosures, including the HVJB, ABJB, HVJB 125, ABJB 125, 4TJB, and 4TJB/125, offer reliable solutions for high-voltage installations up to 45kV. These 11kV junction boxes and 33kV junction boxes are suitable for Zone 1/21 hazardous areas, combining compact, corrosion-resistant designs with versatile mounting options.

Ideal for power generation, distribution, and process facilities, each 11kV junction box and 33kV junction box ensures safe, efficient connection and protection of high-voltage networks. Fully type-tested to meet stringent safety standards, the range delivers long-term performance for indoor and outdoor high-voltage applications.

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Product Overview
Technical Specifications
Key Benefits
Part References
Manufacturer

Junction Boxes 11kV 33kV Overview

ABTECH’s high-voltage junction boxes provide safe and certified termination of 11kV and 33kV power cables in Zone 1 and Zone 21 hazardous areas. Covering the HVJB, ABJB and 4TJB ranges, these stainless-steel enclosures offer reliable high-voltage connection and distribution for both onshore and offshore installations.

Designed for flexibility, the range supports bottom-entry or through-box configurations and can accommodate multiple phase connections. The –125 dual-compartment variants allow separate termination of power, fibre optic and control cables, making them ideal for multi-use and umbilical systems. With IP66 and DTS-01 deluge testing, plus ATEX and IECEx certification, ABTECH’s 11kV junction box and 33kV junction box solutions deliver long-term durability in demanding hazardous area environments.

Contact our experienced team to discuss your requirements or request a quotation for ABTECH 11kV and 33kV junction boxes. Thorne & Derrick International, based in the UK, are trusted suppliers of high-voltage junction boxes and electrical enclosures, providing expert technical advice, competitive pricing, and fast worldwide delivery for both onshore and offshore projects.

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High Voltage Junction Box Specifications

HVJB & HVJB 125 Junction Box Specifications
Enclosure Type	High Voltage
Ingress Protection	IP66/67 to EN60529, Type 4X, DTS-01
Material	2mm 316L Stainless Steel enclosure, silicone gasket, captive 316 stainless steel fasteners, 3mm 316L gland plates
Ambient Temperature Rating	-20°C to +40°C or -50°C to +55°C (other options available, refer to certificate)
Maximum Terminations	3 conductors per phase in & 3 conductors per phase out
Crimp Lugs	16sqmm to 1000sqmm (HVJB / HVJB 125)
Earthing	Via studs on enclosure, door and gland plates
Mounting	Via 3mm thick external mounting straps / external mounting feet
Hazardous Area Certifications
Area Classification	Zone 1 & 21, Gas and Dust
Type of Protection	Ex eb (Increased Safety), Ex tb (Dust Protected) – (HVJB) / Ex e, Ex tb, Ex op is – (HVJB 125)
Apparatus Coding	Ex e IIC T4 Gb, Ex tb IIIC T70°C Db / Ex e IIC T150°C Gb, Ex tb IIIC T110°C Db
Certificate Number	CML 22UKEX3134X, CML 16ATEX3324X & IECEx CML16.0100X – (HVJB) / CML21UKEX31093X, CML14ATEX3123X & IECEx CML14.0047X – (HVJB 125)

ABJB & ABJB 125 Junction Box Specifications
Enclosure Type	High Voltage
Ingress Protection	IP66/67 to EN60529, Type 4X, DTS-01
Material	2mm 316L Stainless Steel, orbital finish, silicone gasket, captive 316 fasteners, 3mm gland plates
Ambient Temperature Rating	-20°C to +40°C or -50°C to +55°C
Maximum Terminations	3 conductors per phase in & 3 conductors per phase out
Crimp Lugs	16sqmm to 1000sqmm
Earthing	Via studs on enclosure, door and gland plates
Mounting	Via 3mm thick external mounting straps
Hazardous Area Certifications
Area Classification	Zone 1 & 21, Gas and Dust / Class 1 Div 2
Type of Protection	Ex sb, Ex tb, Ex op is / Ex op pr (ABJB 125)
Apparatus Coding	Ex sb IIC 2 GD T4 Gb, Ex tb IIIC T70°C / T80°C Db (ABJB) / Ex op is IIC T4 Gb / Ex op pr IIIC T70°C / T80°C Db (ABJB 125)
Certificate Number	CML16ATEX7322X, IECEx CML 16.0099X

4TJB & 4TJB 125 Junction Box Specifications
Enclosure Type	High Voltage
Ingress Protection	IP66 to EN60529, DTS-01
Material	2mm 316L Stainless Steel enclosure, silicone gasket, captive 316 fasteners, 3mm 316L gland plates
Ambient Temperature Rating	-50°C to +55°C (other options available)
Maximum Terminations	Up to 3 connections per phase
Crimp Lugs	6sqmm to 1000sqmm
Earthing	Via studs on enclosure, door and gland plates
Mounting	Via heavy duty 3mm thick external flanges
Hazardous Area Certifications
Area Classification	Zone 1 & 21, Gas and Dust
Type of Protection	Ex eb, Ex tb – (HVJB) / Ex e, Ex tb, Ex op is – (HVJB 125)
Apparatus Coding	High Voltage Enclosure: Ex sb IIC T4 Gb / Optical Signal Enclosure: Ex * op is IIC T4 Gb &/or Ex op is IIIC T70°C/ T80°C Db
Certificate Number	CML 14ATEX3025X, IECEx CML 16.0111X

Key HV Junction Box Benefits

✔ Stainless Steel : 316L (1.404)

✔ Fault rated 50kA 1.0 sec

✔ IP66 to EN60529

✔ DTA-01 deluge tested

✔ Zone 1 & 21, Gas & Dust

✔ Up to 45kV

✔ Suited to operation in tough offshore conditions

✔ Suitable for heavy industrial use where high levels of ingress & mechanical protection are required

✔ Applications including umbilical connection, water injection and downhole pumps, fire suppression systems and temporary power connections

11kV & 33kV Junction Box Ranges

HVJB Junction Box Dimensions & Ratings
Part Reference	Width (mm)	Height (mm)	Depth (mm)	Max Voltage (kV)	Max Current (A)	Power Rating @ T4 (W)	Max Ways	Weight (Kg)
HVJB73(x-x)	650	950	300	11kV	980	259 / 129.5	3	70
HVJB83(x-x)	800	1250	300	11kV	980	346 / 173	3	97
HVJB84(x-x)	800	1250	300	11kV	980	346 / 173	4	97

HVJB 125 Junction Box Dimensions & Ratings
Part Reference	Width (mm)	Height (mm)	Depth (mm)	Max Voltage (kV)	Max Current (A)	Power Rating @ T4 (W)	Max Ways	Weight (Kg)
HVJB1253(x-x)LH	1200	1250	314	11kV	980	346 / 173	3	130
HVJB1254(x-x)LH	1200	1250	314	11kV	980	346 / 173	4	130
HVJB1253(x-x)RH	1200	1250	314	11kV	980	346 / 173	3	130
HVJB1254(x-x)RH	1200	1250	314	11kV	980	346 / 173	4	130

ABJB Junction Box Dimensions & Ratings
Part Reference	Width (mm)	Height (mm)	Depth (mm)	Max Voltage (kV)	Max Current (A)	Maximum Power Rating (W)	Max Ways	Weight (Kg)
ABJB-73(x-x)	650	950	300	15kV	980	259	3	75
ABJB-83(x-x)	800	1250	300	15kV	980	346	3	102
ABJB-84(x-x)	800	1250	300	15kV	980	346	4	102

ABJB 125 Junction Box Dimensions & Ratings
Part Reference	Width (mm)	Height (mm)	Depth (mm)	Max Voltage (kV)	Max Current (A)	Power Rating @ T4 (W)	Max Ways	Weight (Kg)
ABJB1253(x-x)LH	1200	1250	300	15kV	980	346	3	120
ABJB1254(x-x)LH	1200	1250	300	15kV	980	346	4	120
ABJB1253(x-x)RH	1200	1250	300	15kV	980	346	3	120
ABJB1254(x-x)RH	1200	1250	300	15kV	980	346	4	120

4TJB Junction Box Dimensions & Ratings
Part Reference	Width (mm)	Height (mm)	Depth (mm)	Max Voltage (kV)	Max Current (A)	Power Rating @ T4 (W)	Weight (Kg)
4TJB(x-x)	1300	1500 to 2000	500	45kV	980	346 / 288	290
4TJB125(x-x)	1630	2000	500	45kV	980	346 / 288	370

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.

ABTECH HV JUNCTION BOXES & ELECTRICAL ENCLOSURES