ZN28A-12 is a unitary type (operation mechanism is installed inside the Switchgear and combine with it as a whole); ZN28A-12 is a hanging-on type (the mechanism and switchgear are separately installed on cubicle or support frame, then connected with link rod and drive shaft. ) As long as th e VCB operates within the required mechanical parameter, it can work with many advantages such as strong breaking capability, effective arcextinction, long lifetime, reliable and safe operation as well as easy maintenance.
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