June 2019
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3 phase current transformer wiring diagram for 3 phase load (ampere) testing. As you know that we use the current transformer to measure the current. For testing the current (ampere) running to load we use two types of amp meter. In which one series type which is wired in series between load and supply. And 2nd is a current transformer type which is wired with a current transformer to measure the current. We can wire a current transformer for single phase and also for 3 phase. The current transformer is always used for line ampere testing. For 3 phase system ampere testing every Line have their own current transformer. And these current transformers further connected with 3 ampere meter or one ampere meter and ampere testing selector switch.

For better understanding also read below

How to wire current transformer with digital ampere meter
Ampere meter selector switch wiring with current transformers


How to 3 phase current transformer wiring diagram with ampere meter


Note that if your ampere meter is 100/5A then used only 100/5A ratio current transformer. In the below 3 phase current transformer wiring diagram with amp meter. 3 CT coil, and Amp testing meters shown. The current transformer wiring for each meter.


3 phase current transformer wiring diagram


You can wired the current transformer for three phase system as shown in above diagram. However if you want testing 3 phase ampere with only one ampere meter. Then use ampere selector switch with current transformer. For that you need to wire the all 3 current transformer with amp selector switch. And from the selector switch the two wire supply will goes to ampere meter. From the selector switch you can test at each line(phase) ampere.