The structure of the self-locking, safe, easy to install, portable Wide inner window, allowing clamping of big cables or bus-bars Wide range of sizes to accommodate all the existing installations Isolated plastic case recognized Wires plugs, Audio plugs, Power plugs and so on five kinds of plugs Meet the standard IEC60044-1 and ANSI C12.20 High accuracy class ,wide linearity Superitor stability ,separate the external magneitc field interference Measure the current directly It is with the diode to save people's life Usage:Current Model Number: KCT38 Phase:Single Coil Number:Autotransformer Coil Structure:Split Core Ratio:100 or 5A window size:38MM Accuracy: 0.5 Application: Electricity Measuring Operating Temperature: -40C-and70C Note: 1. The current transformer primary should be connected in series with the current loop to be measured. The primary should be close to the circuit short circuit. 2. Current mutual inductance primary circuit is not allowed to open circuit, so please do not install fuse 3. The open current transformer should be connected to the secondary circuit if it is , and then connected to the primary circuit. colour:Blue and black Material:plastic Package Contents: 3 x Current Transformer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.