---
title: Can I use a Raytech Transformer Ratiometer to test CT Ratio also?
description: Raytech TTRs are able to perform CT testing
---

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1. [Raytech USA Help Center](https://support.raytechusa.com/migration?hsLang=en)
2. [Single Phase & Three Phase Ratiometers](https://support.raytechusa.com/migration/single-phase-three-phase-ratiometers?hsLang=en)
3. [General](https://support.raytechusa.com/migration/single-phase-three-phase-ratiometers?hsLang=en#general)

# Can I use a Raytech Transformer Ratiometer to test CT Ratio also?

## Raytech TTRs are able to perform CT testing

Both the TR-1 (Single Phase) and the TR-Mark III 250V (3-Phase) are equipped with the functionality to perform CT ratio testing. For detailed information on the specific capabilities of each system, please refer to their respective user manuals.

 

- [Frequently Asked Questions](https://support.raytechusa.com/migration/frequently-asked-questions?hsLang=en)
- [Capacitance / Dissipation Factor / Power Factor](https://support.raytechusa.com/migration/capacitance-dissipation-factor-power-factor?hsLang=en)
- [Low Resistance](https://support.raytechusa.com/migration/low-resistance?hsLang=en#main-content)
  
  
  
  
  
    - [Micro Centurion II (MC2)](https://support.raytechusa.com/migration/low-resistance?hsLang=en#micro-centurion-ii-mc2)
    - [Kelvin Spike Probes](https://support.raytechusa.com/migration/low-resistance?hsLang=en#kelvin-spike-probes)
- [mini-ATOS](https://support.raytechusa.com/migration/mini-atos?hsLang=en)
- [Single Phase & Three Phase Ratiometers](https://support.raytechusa.com/migration/single-phase-three-phase-ratiometers?hsLang=en#main-content)
  
  
  
  
  
    - [TR-Mark III 250V](https://support.raytechusa.com/migration/single-phase-three-phase-ratiometers?hsLang=en#tr-mark-iii-250v)
    - [TR-1](https://support.raytechusa.com/migration/single-phase-three-phase-ratiometers?hsLang=en#tr-1)
    - [General](https://support.raytechusa.com/migration/single-phase-three-phase-ratiometers?hsLang=en#general)
- [Winding Resistance](https://support.raytechusa.com/migration/winding-resistance?hsLang=en)

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