Rockwell Automation Liqui-Flo DBT Reach Drive User Manual
Page 8
2-2
DBT Reach Drive User Manual
2.1.1 Unbalanced or Ungrounded Distribution Systems
2.1.2 Input Power Conditioning
Certain events on the power system supplying a drive can cause component damage
or shortened product life. The following events can cause such damage.
•
The power system has power factor correction capacitors switched in and out of
the system, either by the user or by the power company.
•
The power source has intermittent voltage spikes in excess of 6000 volts. These
spikes could be caused by other equipment on the line or by events such as
lightning strikes.
!
ATTENTION: Power distribution to Reach Drives is intended to be from
the ungrounded secondary of the system’s step down transformer.
Protective MOVs, the EMI Snubber Board, and common mode capacitors
(3 places) in the drive have been disconnected. They should typically be
reconnected in any application where the power distribution at the drive
is grounded. Refer to Figure 2.1
Figure 2.1 – Protective Circuit Connections for Grounded Drive Systems
SEE CONNECTION
DETAILS
CUT TY-WRAP
PULL INSULATED LEADS FREE
REMOVE INSULATED COVER
SEPARATE LEADS
REMOVE SCREW
FASTEN LUGS WITH SCREW TO FLANGE
TIGHTEN SCREW TO 28 in-lbs
TUCK LEADS BACK INTO UNIT
STEP 1
STEP 2