làm sao để đổi khối three phase fault, breaker từ tần số 60Hz sang 50Hz để sử dụng cho lưới điện Việt Nam

[Walter Roberson]

Approximate translation:

How to change three phase fault, breaker from 60Hz to 50Hz frequency for use in Vietnam grid

Answer 1

[Sabin]

In the attached image it appears that the switching events are synchronized with the cycle (for a 60 Hz frequency we have a cycle of 1/60 seconds). If you just want to change this to 50 Hz keeping the same behavior, then replacing 1/60 with 1/50 will do the job.