Rockwell Automation 1900 General Handling Procedures for Medium Voltage Controllers - Manual (Page 9)

General Handling Procedures for Medium Voltage Controllers
MV-QS050B-EN-P – November 2006
5
The doors to your controller are designed to prevent access to any
medium voltage compartment while the unit is energized.
Note: The door opening procedure for ArcShield™ arc resistant
units differs from the standard listed below.
Standard (Non-ArcShield) Units
1. Move the isolating switch handle to the OFF position; this is the
lower position of the handle (see Figure 4). You must move the
isolating switch handle to the OFF position before any door
providing access to a medium voltage compartment will open.
2. Loosen the door retaining screws of the main power cell door,
which is adjacent to the isolating switch handle, and open the
door.
For cabinets with two power cells, each medium voltage section
contains its own separate door interlock. Once you have moved one
of the isolating switch handles to the OFF position, you can open the
corresponding medium voltage door without disengaging the second
isolating switch handle.
Figure 4 – Isolation Switch Handle in the OFF Position
Opening the Controller
Doors