VCB Interrupter Housing
Epoxy interrupter pole housings for vacuum circuit breakers cast to the original profile, so a replacement is fit-for-purpose in the breaker already installed.
Voltage class
Up to 36 kV
Resin
Hydrophobic epoxy
Process
APG cast
Overview
Engineered Epoxy Housings for Modern & Legacy Switchgear
INDULF manufactures epoxy VCB housings for vacuum circuit breakers and medium-voltage switchgear, engineered to provide the structural support, electrical insulation, and dimensional accuracy required for reliable breaker operation. Every housing is manufactured to match the required mounting interface, pole spacing, and interrupter geometry for dependable fitment within the assembly.
Using Automatic Pressure Gelation (APG) casting, housings are produced from high-performance hydrophobic epoxy resin that offers excellent dielectric strength, dimensional stability, and resistance to moisture, surface tracking, and thermal ageing. Precision-cast metal inserts ensure secure alignment with vacuum interrupters, terminals, and associated breaker components.
Alongside standard designs, INDULF manufactures custom and replacement VCB housings from engineering drawings, technical specifications, or existing samples. In-house tooling and reverse engineering capabilities enable discontinued and non-standard profiles to be reproduced with consistent quality, helping extend the service life of existing switchgear while maintaining compatibility with the original equipment.
Specification basis
Voltage class
Up to 36 kV
Resin system
Hydrophobic cast epoxy
Pole geometry
To the OEM profile
Design basis
Your breaker, or the housing being replaced
Why INDULF
Engineered for precise breaker integration, dependable insulation, and long-term performance.
VCB housings are critical to the alignment, insulation, and structural integrity of a vacuum circuit breaker. INDULF manufactures epoxy VCB housings using controlled APG casting, precision tooling, and engineering-led manufacturing to ensure reliable fitment across standard, custom, and replacement applications.
- 01
Precision Breaker Fitment
Manufactured to match pole spacing, mounting interfaces, terminal locations, and interrupter geometry for accurate integration with VCB assemblies.
- 02
APG Manufacturing
Automatic Pressure Gelation (APG) casting produces dense, void-free housings with excellent dielectric strength, mechanical stability, and dimensional consistency.
- 03
Precision-Cast Metal Inserts
Threaded inserts, terminal interfaces, and mounting points are accurately positioned during casting to ensure secure assembly and reliable electrical performance.
- 04
Custom Profiles & Reverse Engineering
Standard, custom, and discontinued VCB housings are manufactured from engineering drawings, technical specifications, or existing samples to support both modern and legacy switchgear.
- 05
Mechanical Strength
Manufactured to withstand operational stresses while maintaining structural stability and long-term performance inside vacuum circuit breakers.
- 06
In-House Tooling & Quality Assurance
Tooling, mold development, manufacturing, and inspection are managed in-house, enabling faster development, consistent quality, and dependable production timelines.
Applications
Where VCB Housings Are Used
Manufactured for vacuum circuit breakers, medium-voltage switchgear, and industrial power systems, INDULF epoxy VCB housings provide reliable insulation, structural support, and precise interrupter mounting across new installations, retrofit projects, and equipment upgrades.
Obsolete breaker support
Housings for vacuum circuit breakers whose manufacturer no longer supplies spares, cast from the failed part.
Breaker overhaul & refurbishment
Replacement pole housings fitted during scheduled overhaul, alongside interrupter and mechanism work.
OEM & Panel Manufacturing
Manufactured to engineering drawings for OEMs, panel builders, and EPC contractors developing new switchgear panels and breaker assemblies.
Discontinued Breaker Components
Custom-manufactured from engineering drawings or existing samples to replace damaged, discontinued, or non-standard VCB housings without modifying the original breaker assembly.
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Discuss your Epoxy Housing requirement
Whether you need a standard VCB housing or a replacement for a discontinued breaker, INDULF manufactures epoxy VCB housings engineered for precise fitment, reliable insulation, and long-term switchgear performance.
01
Share Your Requirement
Send your engineering drawing, technical specification, or an existing VCB housing. Our team reviews the dimensions, mounting interface, and interrupter configuration.
02
Technical Review & Quotation
We evaluate the manufacturing requirements, recommend the appropriate solution, and provide a detailed quotation with realistic production timelines.
03
Manufactured, Inspected & Delivered
Your VCB housings are manufactured using controlled APG casting, quality inspected, and dispatched with applicable inspection and test documentation.