NEFI High Power Laboratory


Making and breaking tests

Making tests

The making tests are carried out to prove that the contacts of a switch are able to close on to a short-circuit at its rated short-circuit peak current as well as making smaller currents a specified number of times without any maintainance of its contacts. The tests are carried out at the rated voltage of equipment. Typical test objects are general purpose switches, earthing switches, switch-fuse combination switches and circuit breakers.

 

Breaking tests

The breaking tests are carried out to prove that the equipment can interrupt its rated short-circuit current and all normal currents up to and including its rated current. The tests are carried out at the rated voltage of the equipment. Typical test objects are general purpose switches, switch-fuse and fuse-switch combinations, circuit breakers and fuses.