Panasonic KW2G User Manual

Also see for KW2G Eco-POWER METER: User manual Quick start guide

Contents

KW2G / KW2G-H Eco-POWER METER173.6 How to attach the Current Transformer (CT)・One CT is needed for 1 unit when measuring 1P2W (2 CTs for 2-circuit). Two CTs are needed whenmeasuring 1P3W/3P3W. Using all CTs for one unit should be the same.・Check beforehand that the thickness of the electric wire is smaller than the through-hole of the CT.・When connecting CT, connect the secondary side to the terminal of the main unit first, and after thatwire the primary side to a load electric wire. Incorrect order might cause an electric shock or break CT.・The CT has polarity. Wire correctly according to the K and L marks. Wrong direction can’t measurecorrectly.・When closing CT, check that there is no foreign materials on the divided face. And make sure it isclosed securely once the wire is in place; if not the measurement value will be not accurate.・When CT’s cable is extended, it is possible to extend up to about 10m with the cable of AWG#22 ormore cross section under the environment without noise at all. Please use the thick cable as much aspossible.・Separate the wiring (strong electric part) of the measured voltage input terminal (operating powersupply terminal) from the CT cable. It may not satisfy the accuracy due to noise.・Only same color housing of cable and connector of CT can be connected.That of different color (blue and white) can't be connected.◆To connect CT with secondary side current 5AHow to set for measuring by combination with CT (secondary side current 5A)(1) Select 5A at CT type setting mode (CT-T).(2) Set the primary current of measured CT (secondary side current 5A) at primary side current ofCT setting mode (CT-1). If the measured CT is 400A/5A, set to ‘400’.(3) Clamp the dedicated CT for 5A (AKW4801C), which is connected to the main unit first, tosecondary side of the CT (secondary side current 5A). CT direction (K→L) should be set for thecommercial CT direction.*Set the CT (secondary side current 5A) and the dedicated CT for 5A approximately 1m apart.If the two CTs are set too close each other, it may not measure accurately due to magneticfield interference.(Connection example)With Ammeter etc.Secondary currentBreakerDedicated CT for 5AAmmeter etc.Power supplyCT with 2nd current 5AL KKLEco-POWERMETERLoad