Continental Control Systems sells several different series of current transformers (CTs) in various window sizes, current ranges, and accuracy grades. Some of the CTs we sell feature safe, low-voltage outputs (not current output ratio CTs) for indoor use only in 50 or 60 Hz circuits up to 600 Vac. Low-voltage output CTs contain a built-in burden resistor and is calibrated to output 0.333 Vac when the CT’s rated full-scale current flows through the conductor being measured. Shorting blocks are not needed on Low-voltage output CTs because the internal burden resistor is always connected. Shorting blocks should be used on 5 amp output CTs.
To select a CT, we recommend first deciding on a style, either a split-core (opening ) or a solid-core (non-opening) CT, then select the model you need based on the maximum load current you are measuring and the size of the conductor being measured.
- For complete specifications, available current ranges, and datasheet downloads click on the individual series part number links in the tables below.
Current Transformer Line Card
- CT Line Card (PDF, 1 page)