Skip to main content

Accu-CT® Current Transformers

Revenue-grade ANSI C12.1 and C12.20 accuracy
Exception low-end accuracy and phase angle error
UL Listed—UL 2808 XOBA
CE mark
Opening split core style
Standard 0.333 Vac and optional 1.0 Vac outputs available
Two patents issued

*for commercial pricing contact sales

Accu-CT Current Transformers

Current Transformers

Continental Control Systems sells several different series of current transformers (CTs) in various window sizes, current ranges, and accuracy grades. Most WattNode meters use voltage output CTs (not current output ratio CTs) CTs are suitable for use in dry (indoor) locations in 50 or 60 Hz services up to 600 Vac. Low-voltage output CTs contain a built-in burden resistor and are calibrated to output 0.333 Vac when the CT’s rated full-scale current flows through the conductor being measured. Safe, low-voltage output CTs do not need shorting blocks because the internal burden resistor is always connected.

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

0.333 V Output CTs

Family (click on link)WindowAmp RangesAccuracy
ACTL-0750 Split-Core CT0.75 x 0.75 in.5 to 250 A1.0%, 0.5%
ACTL-1250 Split-Core CT1.25 x 1.83 in.250 to 600 A1.0%, 0.5%, 0.3%
CTBL Large Split-Core CTVaries800 to 6000 A1.5%
CTML-0350 Split-Core CT0.36 x 36  in.5 to 70 A1.0%
RCSL-RCLL Rogowski Coil1.5 to 11.8200 to 5000A1.0%
CTRC Rogowski Coil3.1 to 12 in. dia.250 to 6000 A1.0%
CTS Split-Core CT2.0 x 2.0 in.400 to 1200 A1.0%
CTT Solid-Core CT0.3 to 1.25 in.5 to 400 A1.0%
TCL-B Solid-Core CT0.5 in. dia.50 A, 100 A0.3%, 0.2%

Support articles to assist with installing, configuring, troubleshooting, and using our WattNode meter products and accessories.