With load operation is the operation, touch, breaking is the current through the electrical or cable.
Do not allow the load isolating switch. Isolating switch no arc device, no drying capacity of the technical conditions of the request, it will cut off the load current, generating arc short-circuit, caused by burning equipment and other large accident, at the same time, because of the strong arc emits a lot of heat and light, but also electric shock and electric injury operation personnel.
YES1-630M design have arc device
Yes1-GA ATS belong load isolation seach .it no arc device protection