Series SCT Current Transformer

Optional Auxiliary, Relay Output, Split Core

The Series SCT Current Transformers continuously measure the current consumption of pumps, fans, boilers, solar panels and chillers for use in energy monitoring. Current or voltage outputs can be scaled using a slider switch to select between three factory set ranges. Split core configuration allows the current transformer to be installed on new and existing installations. Snap-on mounting bracket allows for quick installation of replacement transformers. An optional 10 A command relay can snap onto the current switch, which eliminates the need to mount an additional relay.

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

Model Description Usually Ships* Price Order
Ships: 4-5 Weeks
Price: $137.00
Current transducer, split core, 4-20 mA output, range 30/60/120A 4-5 Weeks* $137.00 Order
Ships: 3-4 Weeks
Price: $114.00
Current transducer, split core, 0-5 VDC output, range 30/60/120A 3-4 Weeks* $114.00 Order
Ships: 3-4 Weeks
Price: $114.00
Current transducer, split core, 0-10 VDC output, range 20/100/150A 3-4 Weeks* $114.00 Order


Amperage Range:
30/60/120 A or 20/100/150 A (depending on model).
Continuous Operating Current:
120 A or 150 A (depending on model).
4 to 20 mA, 0 to 5 VDC, 0 to 10 VDC (depending on model). Optional relay NO SPST; 10 A @ 260 VAC, 5 A @ 30 VDC.
Power Requirements:
Self-powered or 24 VDC (depending on model).
±2% from 10 to 100% of selected range.
Temperature Limits:
5 to 140°F (-15 to 60°C).
Humidity Limits:
0 to 95% non-condensing.
Response Time:
2 s.
Isolation Voltage:
600 VAC RMS.
50/60 Hz.
Enclosure Rating:
UL, V-O flammability rated, type 66 nylon.
Agency Approvals:
CE, RoHS, cUL, UL.

Product Literature


Catalog Pages




What is the proper way to wrap the wire around the Current Transformer #CCT40-200?
If the current running through your wire is high enough to be detected by the model CCT you have, then you can simply single wrap it as you have shown in the attached PDF you provided. However, if the current is too low to be detected, then you would want to wrap the wire around until the current is high enough to be detected. Here is a link to the service manual for our Series SCT Current Transformer that explains this concept better, Series SCT Instruction Manual. See Figure 4.

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