CT-LS Series 5 A Secondary Current Transformer

5 A Secondary Current Transformers offer a compact, cost-effective means of measuring primary current. These current transformers provide an easy-to-install method to measure AC current, producing a 0–5 amp output proportional to the current flowing through the sensing window. The CT-LS series offers a large sensing window and a split-core design for easy installation.

Power-Pump Load Monitoring




Current Transformer Dimensions



Current Transformer Connections





A current transformer (CT) should never be energized (AC current through the sensing window) without a load connected to the output terminals. Best practice is to terminate the current transformer secondary on a terminal block with the ability to short between two points before extending the leads to the load. If it is ever necessary to remove the load from the CT while it is or could become energized, a shorting bar can be placed between the secondary loads, as shown below in the drawing on the right. This will allow the load to be removed safely.