RHM International designs and manufactures high-reliability dry-type high-voltage equipment for power grid, utility, OEM, and heavy industrial applications.
Our product families include current transformers, capacitive voltage transformers, transformer bushings, BIIT™ “All-In-One” measurement bushings, wall and special bushings, cable terminators and accessories, IEC 61850 / NCIT solutions, and smart monitoring options.
RHM products are developed around dry-type insulation technologies designed to support safer, cleaner, lower-maintenance high-voltage operation. Our solutions are used in demanding operating environments where reliability, technical performance, and long-term equipment stability are critical.
If you are looking for a standard product family, technical documentation, or a custom solution for a specific project, the sections below can help you find the right starting point.
Submit Your Specs | View Product Specification Sheets
Product Families
Current Transformers
RHM dry-type high-voltage current transformers are for measurement and protective relaying in power-grid applications.
RHM’s current transformer product family which also includes specialized options for high-current, EHV cascade, optical/electronic, and shunt capacitor bank applications uses its trademarked HV DryShield® insulation technology for its designs.
- LRGBJ Series
- LRGBJ-ZH Cascade Series
- LRGBJ-ZHD Series
- GDGL Optical/Electronic Series
- Shunt Capacitor Bank Applications
Capacitive Voltage Transformers
RHM’s new state-of-the-art dry-type capacitive voltage transformer provides an alternative to fluid-paper/film CVTs and the maintenance issues associated with fluid-filled CVTs as they age.
This product provides accurate, reliable and voltage measurements for metering, protection and control applications in high-voltage power systems.
View Capacitive Voltage Transformers
Transformer Bushings
RHM’s RIF® dry-type paperless bushing technology is designed for ultra-reliability that has been internal arc fault type tested and proven maintenance-free service setting the standard for over 20 years.
BIIT™ “All-In-One” Measurement Bushing
The BIIT® product is RHM’s “All-In-One” high-voltage measurement bushing solution. It is designed to combine bushing functionality with measurement capabilities for applications where compact design, monitoring, and integrated performance are important.
This product family may be useful for digital substation, smart grid, or specialized high-voltage equipment applications.
View BIIT® Measurement Bushing
Wall & Special Bushings
RHM’s wall and special bushings are designed for high-voltage installations that require reliable insulation through building walls, substation enclosures or specialized equipment arrangements.
These products include standard wall bushing configurations, combined wall bushing / current transformer designs, and custom bushing solutions for project-specific requirements.
- STB Series Wall Bushing
- STB-L Series: Combined Wall Bushing - Current Transformers
- Special Bushings — Custom Designs
Cable Terminators and Accessories
RHM dry-type cable terminators and accessories are designed for high-voltage cable connection and termination applications.
These solutions support simple and robust outdoor installations and provide leakage-free design, proven insulation performance, environmental resistance, and longer life expectancy.
View Cable Terminators and Accessories
IEC 61850 / NCITs
RHM offers IEC 61850-compatible non-conventional instrument transformer solutions for digital substation and smart grid applications.
These products are designed to support modern measurement, monitoring, and communication needs where low-power instrument transformers, digital outputs, and substation automation are part of the project requirements.
View IEC 61850 / NCIT Products
Smart Monitoring Options
RHM smart monitoring options are designed to support long-term equipment reliability with built-in insulation condition monitoring solutions.
RHM smart monitoring solutions can help utilities, OEMs, and industrial users better understand equipment condition without costly add-on monitoring devices.
Not Sure Which Product Family Fits Your Application?
High-voltage equipment requirements often depend on the application, system voltage, insulation needs, installation environment, standards, measurement requirements, and project specifications.
If you are not sure which RHM product family is the best fit, you can submit your project requirements or contact RHM for technical assistance.
Submit Your Specs | Contact RHM
Common Questions
What types of high-voltage products does RHM offer?
RHM offers dry-type paperless products for high-voltage current transformers, capacitive voltage transformers, transformer bushings, BIIT™ measurement bushings, wall and special bushings, cable terminators and accessories, IEC 61850 / NCIT solutions, and smart monitoring options.
What applications are RHM products designed for?
RHM products are designed for power-grid, utility, OEM, substation, transformer, heavy industrial, and specialized high-voltage applications.
Does RHM offer dry-type high-voltage equipment?
Yes. RHM develops high-voltage products using dry-type insulation technologies such as HV DryShield® and RIF® insulation systems, depending on the product family and application.
Can RHM support custom high-voltage equipment requirements?
Yes. RHM can review project specifications and custom requirements. Visitors can use the Submit Your Specs page to provide project details for review.
Where can I find technical documentation?
Technical documentation, product specification sheets, publications, and downloads are available in the Resources section of the website.
If you are evaluating high-voltage equipment for a power grid, utility, OEM, or industrial application, RHM can help review your technical requirements and direct you to the appropriate product family.
Submit Your Specs | View Product Specification Sheets | Contact RHM
