This paper firstly introduced the principle of reflective fiber optical current transformer

described the electromagnetic compatibility requirements of reflective fiber optical current transformer which works in a complex strong electromagnetic environment

then presented the measures against electromagnetic interference of reflective fiber optical current transformer. Finally

in connection with fiber optical current transformer

some electromagnetic compatibility tests were carried out in this paper

mainly consists of the radio frequency conducted immunity test

the electrostatic discharge immunity test

the surge immunity test

the electrical fast transient burst immunity test and the damped oscillatory waves immunity test. According to the results of the initial tests

it can not able to meet the requirements completely. In order to improve the anti-interference capability

the appropriate corrections were implemented by various optimization measures of electromagnetic compatibility

which include the addition of elements like filter capacitor and TVS tube applied on power modules and signal board input power. In this paper

the magnetic was also joined to the power line

and the conductive spring contacts reed was added to the chassis

traces in the chassis were also rational distributed. By the results of the second tests

it is totally satisfactory.