This category contains articles on current transformers(CTs), available styles, sizes, and current ranges and other general information. CT spec sheets and pricing are available from the Products section on the Current Transformers page.

Current Transformers (CTs) measure the amount of electricity flowing in a circuit. CTs are used with a WattNode meter, which also measures voltage. The current and voltage measurements are used by the meter to to calculate power and energy (kW and kWh).

CCS only sells “safe”, low-voltage outputs CTs. This type of CT is calibrated to output exactly 333 mVac when the CT’s full-scale rated current is flowing through the conductor being measured.

CAUTION! WattNode meters can only be used with 333 mV output CTs. Other types of CT can generate lethal high voltages that can permanently damage equipment.