Application Notes

EAP-032104

Motor Load Current Measuring

We plan to install a simple measuring instrument in order to measure motors’ load current in each manufacturing line at factory. Specifically, we consider installing them as combination use of an AC current transducer and an indicator. We can not attach a CT (Current Transformer) at every load current check-up. We are looking for an AC current transducer responding to clamp-on current sensor so that we can measure each motor load current without needing a CT.

We recommend you to use an AC current transducer, the LTCEC, which is including easy-to-install clamp-on type current sensor. You can measure load current without needing to prepare any CT. Specifying the LTCEC output range as 4-20 mAdc then you can combine it with our indicator, the 43AL.
The 43AL is 2-wire DC panel meter hence it doesn’t require any auxiliary power supply for itself. Power supply is needed only for the LTCEC, then you can achieve wiring cost savings and labor hour savings.
About the input of the LTCEC, it is available for wide input range from 10 A to 600 A so that you can specify your request range. Taking advantage of clamp-on type sensor, you can measure each different range of load current by only swapping the transducer and its clamp-on sensor. As for indicator scaling, it is very easy for you to change each measuring scale by adjusting a potentiometer on the top of the 43AL.