For medium and high voltage switching devices (e.g. circuit-breakers) different single and three phase making and breaking tests are required. Many of these tests are carried out using synthetic circuits.
![](/securedl/sdl-eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpYXQiOjE3MjIwNTk3MTIsImV4cCI6MTcyMjE0OTcxMiwidXNlciI6MCwiZ3JvdXBzIjpbMCwtMV0sImZpbGUiOiJmaWxlYWRtaW4vdXBsb2Fkcy9waWNzL3Rlc3RzLTEtMV8wNS5qcGciLCJwYWdlIjoyOTZ9.pHVPhYlYXf7adUJUQHGgqeVZCRYPJAuQhnoJoCwJWrA/tests-1-1_05.jpg)
For medium and high voltage switching devices (e.g. circuit-breakers) different single and three phase making and breaking tests are required. Many of these tests are carried out using synthetic circuits.