Solid and split-core current transformers (CT’s) are available for use with the WNB-P (pulse output)  and the WNC-MB (Modbus output) Energy Meters.  Devices with various physical dimensions and current ratings are available.  CT’s have 0.333Vac output at rated Full Scale current. 

Split Core Current Transformers
Split core CTs have a removable section, so that they can be installed without interrupting the circuit, and they are available in three opening sizes.  0.333VAC output at rated current Accuracy ±1% from 10% to 130% of rated current No exposed metal Phase angle <2 degrees UL recognized 12" leads
Model	I.D.	Rated Amps	Max. Amps	Max. Wire Gauge
CTS-0750-yyy	0.75"	51, 151, 30, 50, 70, 100, 150, 200	200	3/0, 300*
CTS-1250-yyy	1.25"	70,100,150,200,250,300,400,600	800	500, 800*
CTS-2000-yyy	2.00"	200,400,600,800,1000,1200,1500	2000	1500, 2000*

CT suffix "-yyy" is the rated amps.
"I.D." is the inside diameter (aperture) of the CT. Note, that for best accuracy, the CT’s should be sized such that the current carrying conductors fill at least 60% of the aperture (opening).
"Max. Amps" is the highest continuous current that the CT can handle without being damaged.
"Max Wire Gauge" is the largest wire gauge that should fit through this size of CT. Wire sizes of 100 or larger are in units of kcmils (formerly MCM), which are used in North America for wire sizes larger than 4/0.

¹Note: the CTS-0750-005 and CTS-0750-015 do not meet the published accuracy specifications. For applications where accuracy is important, we recommend using the CTT-0300-005 or CTT-0300-015 instead.
* These sizes may or may not fit, depending on the insulation thickness.

 

 

Solid Core (Toroidal) Current Transformers
Toroidal (solid core) current transformers are more compact and accurate. You must interrupt the circuit to be measured in order to install solid core CTs around the conductor.  Hence, they are better suited for new wiring or permanent installation. 0.333VAC output at rated current Accuracy ±1% from 10% to 130% of rated current No exposed metal Phase angle <1 degrees UL recognized 12" leads
Model	I.D.	Rated Amps	Max. Amps	Max. Wire Gauge
CTT-0300-yyy	0.30"	5, 15, 30	40	10,4*
CTT-0500-yyy	0.50"	15, 30, 50, 60	80	2, 1/0*
CTT-0750-yyy	0.75"	30, 50, 70, 100	130	3/0, 300*
CTT-1000-yyy	1.00"	50, 70, 100, 150, 200	260	300, 500*
CTT-1250-yyy	1.25"	70, 100, 150, 200, 250, 300, 400	520	500, 800*

CT suffix "-yyy" is the rated amps.
"I.D." is the inside diameter (aperture) of the CT.
"Max. Amps" is the highest continuous current that the CT can handle without being damaged.
"Max Wire Gauge" is the largest wire gauge that should fit through this size of CT. Wire sizes of 100 or larger are in units of kcmils (formerly MCM), which are used in North America for wire sizes larger than 4/0.
* These sizes may or may not fit, depending on the insulation thickness.

 

 

Bus-Bar Split-Core Current Transformers
Bus bar CTs are similar to split core CTs, but are available in a wider range of shapes and sizes. They have a removable section, so that they can be installed without interrupting the circuit. 0.333VAC output at rated current Current ratings from 600A to 3000A. Accuracy ±1.5% from 10% to 130% of rated current. Phase angle <1.5 degrees UL recognized
Model	Aperture Dimensions	Current Rating (Aac)
CTB-1.5x3.5-0600	1.5" x 3.5" (38.1mm x 88.9mm)	600
CTB-4.0x4.0-0800	4.0" x 4.0" (101.6mm x 101.6mm)	800
CTB-4.0X4.0-1200	4.0" x 4.0" (101.6mm x 101.6mm)	1200
CTB-4.0x4.0-2000	4.0" x 4.0" (101.6mm x 101.6mm)	2000
CTB-4.5x4.0-3000	4.5" x 4.0" (114.3mm x 101.6mm)	3000

Special Requirements CT’s:
High current, bus-bar and other special CT’s can be provided.  Contact Logic Beach with your special requirements.