Rockwell Automation 20L PowerFlex 700L Liquid-Cooled Adjustable Frequency AC Drive - Manual (Page 19)

General Installation Information 1-3
PowerFlex 700L Frames 2, 3A, and 3B Liquid-Cooled AC Drives User Manual
Publication 20L-UM001E-EN-P
For installations within a cabinet, a single safety ground point or ground bus
bar connected directly to building steel should be used. All circuits
including the AC input ground conductor should be grounded
independently and directly to this ground point or ground bus bar.
Figure 1.1 Typical Grounding
Safety Ground - PE
This is the safety ground for the drive that is required by code. This point
must be connected to adjacent building steel (girder or joist), a floor ground
rod, or bus bar (
Figure 1.1 ). Grounding points must comply with national
and local industrial safety regulations and/or electrical codes.
Shield Termination - SHLD
The Shield terminal provides a grounding point for the motor cable shield.
It must be connected to an earth ground by a separate continuous lead. The
motor cable shield should be connected to this terminal on the drive (drive
end) and the motor frame (motor end). Use a shield terminating or EMI
clamp to connect shield to this terminal.
When shielded cable is used for control and signal wiring, the shield
should be grounded at the source end only, not at the drive end.
Wiring Requirements for the Drive
Certain drive requirements should be checked before continuing with the
drive installation. Wire sizes, branch circuit protection, encoder feedback
(for FVC regulation), and wiring to disable the drive are all areas that need
to be evaluated.
Operation of the drive can be disabled in two locations. The Gate Enable
terminal block on the front of the power structure can be used to disable the
firing of inverter IGBTs. When the Gate Enable signal is opened, inverter
IGBTs are disabled independent of any software control. This action also
generates fault 207 in the Inverter Power Module to enunciate this
condition. As a result of this fault, the Active Converter Power Module is
also turned off, but this is done via software operation. The firing of IGBTs
in the Active Converter Power Module can be disabled independently of any
software control by opening the connection between terminals 13 and 14 on
PE R
(L1)
S
(L2)
T
(L3)
U
(T1)
V
(T2)
W
(T3)
DC
+
DC
–
Required
Input Fusing
Required Branch
Circuit Disconnect
BR1 BR2