Network transformer primary disconnect assembly

A housing assembly for a network transformer primary disconnect assembly, said network transformer primary disconnect assembly including an interlock assembly and a circuit interrupter, said circuit interrupter including a number of contact assemblies, said interlock assembly including a mechanical interlock assembly with a number of pairs of contact assemblies, each pair of contact assemblies of the mechanical interlock assembly includes a number of sets of movable contact assemblies, each set of movable contact assemblies including an operation contact assembly and a ground contact assembly, each operation contact assembly having a distal portion, each ground contact assembly having a distal portion, each said set of mechanical interlock assembly movable contact assemblies structured to move between an open, first position, wherein each said set of mechanical interlock assembly movable contact assemblies is spaced from an associated one of the circuit interrupter contact assemblies, and a closed, second position, wherein each said set of mechanical interlock assembly movable contact assemblies is coupled to, and in electrical communication with, said associated circuit interrupter contact assembly, wherein, when each said set of mechanical interlock assembly movable contact assemblies is in said second position, each said set of mechanical interlock movable contact assemblies and each circuit interrupter contact assembly meet at a contact assembly interface, said housing assembly comprising:

• a number of sidewalls defining an enclosed space;
• a visible break assembly including a number of viewing windows in at least one sidewall of said number of sidewalls;
• each said viewing window aligned with one of a contact assembly interface, a movable contact assembly operation contact assembly distal portion, or a movable contact assembly ground contact assembly distal portion when said movable contact assembly is in the open, first position;
• and
• a number of said viewing windows are aligned with a ground contact assembly interface.