Rockwell Automation SB3000 AC Power Modules - Manual (Page 33)

Installation Guidelines 3-5
3.2.6 Wire Routing
AC input wiring is routed through the top of the cabinet, above AC line terminals 181,
182 and 183. DC output wiring is also routed through the top of the cabinet. DC output
wiring is usually connected directly to the D-C bus in the overhead enclosure that
distributes the DC power to the common DC bus SA3000/SA3100 Power Modules.
The AC power distribution cabinet is mounted separately from the SB3000 Power
Module but should be positioned conveniently close by. The AC disconnect is a
thermal magnetic circuit breaker or a fused disconnect switch which is rated to protect
the power wiring in the SB3000 Power Module. The AC disconnect is mounted such
that it can be locked out, providing safe access to the inside of the power distribution
cabinet and to the SB3000 Power Module.
3.3 Grounding
To prevent noise interference and possible malfunction of this equipment, it is
imperative that a good cabinet ground be provided. The grounding conductor must be
as short as possible and be run directly from the control panel ground terminal to a
solid earth ground. It is recommended that the grounding conductor be the same size
conductor as the AC input power wiring. Multi-cabinet grounding wires should not be
daisy-chained but should be run separately to the common point of earth ground.
3.4 Installing a Power Module Cabinet
Use the following procedure to install a SB3000 Power Module cabinet.
Step 1. Ensure that AC input power leading to the SB3000 Power Module is off.
Step 2. Position the SB3000 Power Module on a level mounting surface. See figure
3.1, 3.2, or 3.3 for cabinet dimensions. Floor mounting dimensions are
included for applications where the cabinet is to be attached to the floor.
Step 3. Connect the AC input leads from the line reactor/pre-charge control directly
to the 181 (L1), 182 (L2), and 183 (L3) terminals. Connect the GND terminal
to earth ground. See figure 3.4.
Step 4. Connect DC bus terminals 45 and 47 (800V DC) to the SA3000/SA3100
Power Module bus terminals. Connect the GRD terminal to earth ground.
See figure 3.4.
Step 5. Connect the AC control power input line (two-wire 115 VAC with ground) to
terminals L1 (L), L2 (N), and GND on the control wiring terminal board. See
figure 3.4.
!
ATTENTION: Ungrounded equipment represents a shock hazard.
Connect the power module's ground terminals to earth ground using
properly-sized ground wires. Failure to observe this precaution could
result in severe bodily injury or loss of life.