Auxiliary switches

Positively driven contacts (for contactor relays)

Definition according to IEC 60947-5-1, Appendix L:

Positively-driven contact elements are a combination of "n" NO contact and "m" NC contact which are designed in such a way that they cannot be closed simultaneously.

Mirror contacts (for power contactors)

Definition according to IEC 60947-4-1, Appendix F:

Contact with positive opening operation. A mirror contact is an NC contact that cannot be closed simultaneously with an NO main contact.