Meramec Quality “Made by Pros”

Why choose Meramec Instrument Transformer Co.
Meramec Instrument Transformer Co. is the preeminent manufacturer of instrument current transformers for the power generator, power transformer, and the high- and medium-voltage circuit breaker markets. For over 40 years, Meramec has been dedicated to designing and manufacturing the highest quality, custom made instrument current transformers for the electric power industry.

Our Products
Instrument Current Transformers are used for monitoring current in electrical power systems for system protection, control and measurement. Our present product lines for your given applications are:


Product Types
Harsh environment applications
  • Isolated Phase Bus (Internal/External) 0.6kV – 25kV
  • Generator CT (Terminal Bushing)
  • External BCT or Slip-Over CT (Bushing or Cable)
Oil Environment Applications
  • Power Transformer
  • Step-Voltage Regulator
  • Bulk Oil Circuit Breaker (mostly replacement)
Dry Environment Applications
  • HV Power Circuit Breaker
  • MV Power Circuit Breaker
  • Isolated Phase Bus [IPB]
  • Generator CT (Board Mounted for direct use on terminal bushing)

Customer Support
  • Unplanned outage recovery support with 24/7 support
  • Immediate turnaround on emergency outage recovery situations
  • Industry-leading Turnaround Time

Technical Support
  • Each design is engineered for your situation – whether new installation, upgrade, or replacement
  • Legacy parts support
  • Our Engineering staff members are IEEE-PES and Instrument Transformers Sub-Committee members and active in the development of industry standards

Celebrated Inside and Outside of the Industry…
  • U.S. Dept. of Commerce’s Manufacturer of the Week Recipient
  • Missouri Impact! Award Recipient
  • Missouri Show-Me Heroes Employer
  • Recognized in the Governor’s State of the State Speech for our investment and results related to Workforce Training
  • NIST Green Supplier Network Partner