Current Transformers (CT's)

Current transformers are used for the measurement of electric alternating currents. When current in a circuit (primary current) is too high to directly apply to measuring instruments, a current transformer produces a reduced current (secondary current) accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instruments. A current transformer also isolates the measuring instruments from what may be very high voltage in the monitored circuit.
Relationship between primary and secondary currents is called rated transformation ratio.


• Wide range of accuracy classes: 0.2S, 0.2, 0.5, 1
• Wide range of supported primary currents, the dimensions of rails, the length of casing and hole diameters.
• Multiple mounting methods, including wall mounting, 35mm DIN rail, the conductor, a current bar.
• Shields designed to seal connections.