RHM International, LLC

Innovative High Reliability High Voltage Equipment for the Power Grid

Menu
  • Home
  • Products
    • RHM International current transformer typesCurrent Transformers
      • LRGBJ Series – up to 550kV
      • LRGBJ-ZH Cascade Series – above 220kV
      • LRGBJ – ZHD Series for High Currents
      • GDGL Optical/Electronic Series
      • Shunt Capacitor Bank Applications
    • Dry Insulation high voltage transformer bushings by RHM InternationalTransformer Bushings
      • RIF® – FGRBW Tough Series
      • Cascade RIF® for EHV Applications
      • Built-In Insulation Monitoring
    • RHM International high voltage wall bushingsWall Bushings – Special Bushings
      • STB Wall Bushings Specifications
      • STB-L Series: Wall Bushing with CT
      • Special Bushings — Custom Designs
    • cable termination by RHM InternationalHV DRY TYPE OUTDOOR CABLE TERMINATOR
      • Cable Terminator
    • Electronic Combined Voltage and Current Transformer REVCT35-1000 Series 35 kV – 1000 kV by RHM InternationalIEC 61850 Ready and NCITs
      • BIIT™ HV MEASUREMENT BUSHING
      • Optical/Electronic Current Transformer
      • Electronic Combined VT and CT
      • Smart Monitoring
    • Close
  • Why Us
    • Company Advantages
      • Shorter Lead Time
      • Custom Designs
      • Testing Capabilities
      • Quality & Supply Chain
      • ISO 9001
    • Product Benefits
      • Outstanding Performance
      • No Maintenance
      • No Explosions
      • Easy Storage
      • Environmentally Friendly
      • Longer Life & Higher ROI
      • Sustained Higher Performance
      • Proven Track Record
    • Expertise & Assistance
    • Close
  • Technology
    • 1Our Technologies
      • HV DryShield® for CT’s & Wall Bushings
      • RIF® Insulation for Transformer Bushings & Cable Terminators
    • smart-monitoringSmart Monitoring
      • Built-in Condition Monitoring
      • Bushing based Transformer PD Monitoring
    • The-Dry-Type-RIF-Bushing_The-New-Technology-in-HV-Bushings-1Publications
      • BIIT Bushings: Intelligent HV bushings w/ integrated low power voltage and current transformers
      • HV DryShield® – A dry type HV insulation system for extreme environments
      • RIF ® bushings The paperless, dry-type bushing technology
      • The Dry Type RIF ® Bushing: New Technology in HV Bushings
      • Advances in Bushings Technology – Integrated Monitoring Systems
    • 3Product Specification Sheets
      • Current Transformers
      • Wall Bushings
      • IEEE Bushings
      • IEC Bushings
      • Cable Terminals
    • Installation & Testing
    • Close
  • Your Specs
  • HV Testing Services
  • About Us
  • Blog
  • Opportunities
  • Contact Us

Introduction

RHM International, LLC, a Massachusetts, USA Company, is developing, manufacturing, and selling innovative high voltage, high quality equipment, primarily Current Transformers and Bushings. Its main manufacturing sites are located near Beijing, China and Boston, USA.

Our customers are typically large electrical power utilities, heavy industries, and OEM companies around the world who realize that for economic, safety, and environmental reasons, they need to upgrade older insulation-based equipment.  RHM International's technology strengths include high quality proprietary dry designs and a genuine maintenance-free operation with outstanding and lasting performance; and environmentally friendly too.

Customers value also our assistance and strong custom design capabilities, based on an extensive understanding of the applications requiring such equipment.

RHM International believes in superior products, satisfied customers, strong strategic partners, highly trained employees and strong management.

Guided by these traditional corporate values, we continuously innovate, producing a vibrant R&D culture.

©2025 RHM International, LLC. All Rights Reserved. Developed by BBDS Design