CTT0550 Toroidal Current Transformer, Motor Protection

The CTT0550 series of panel mounted, toroidal, solid-core current transformers offers exceptional signal transformation accuracy with minimal phase shift. Designed for applications where the AC primary current must be transformed into a lower AC current or AC voltage signal appropriate for micro-processor based circuitry while exposed to harsh environmental operating conditions.

Model Rated Primary Current Secondary Output Accuracy Class
CTT0550 100A to 800A AC current option: Winding ratio options:
1:1000, 1:2000, 1:3000 or 1:5000
0.1, 0.2, 0.5 (IEC 60044-1)
AC voltage option: Any value between 0.333VAC and 7.07VAC
Notes: Secondary AC current option: Specifications: Physical Specifications:
Download CTT0550 Data Sheet (pdf 742kb)
Standard Sizes – Three Phase: Standard Sizes – Three Phase – DIN Rail Mounted: Standard Sizes – Single Phase:


Many of our products can be designed and manufactured to meet the specific application requirements. For a no obligation technical evaluation, please provide the specific performance requirements to engineering@tichenassociates.com.