Residual (zero-sequence) current transformer: The products mainly include ZMCTLY series, ZM-LX series, ZMCTLF series, ZMCTLK series, etc. They are suitable for current, voltage detection, fire prevention, leakage prevention system, low current grounding system, and building fire monitoring system. They are used for the leakage current detection of two or three phase currents. When an electric shock or leakage occurs in the circuit, the transformer generates an induced current to drive the subsequent circuit to work, so as to cut off the circuit. The product has a fast response speed, a large detection range, suitable for leakage current detection of various sizes of loop (main loop current: 100A-2000 A), and it has a large sampling resistance range (0-500 Ω).

Typical transformation ratio: 1A/0.5mA 1A/1mA