18 Rockwell Automation Publication 520-TD002A-EN-E - May 2015
PowerFlex 527 AC Drive Specifications
High Altitude
Debris Protection
Take precautions to prevent debris from falling through the vents of the drive housing during installation.
Storage
• Store within an ambient temperature range of -40...85 °C
(1)
.
• Store within a relative humidity range of 0...95%, noncondensing.
• Do not expose to a corrosive atmosphere.
(1) The maximum ambient temperature for storing a Frame E drive is 70 °C.
AC Supply Source Considerations
Ungrounded Distribution Systems
Disconnecting MOVs
To prevent drive damage, the MOVs connected to ground shall be disconnected if the drive is installed on an ungrounded
distribution system (IT mains) where the line-to-ground voltages on any phase could exceed 125% of the nominal line-to-
line voltage. To disconnect these devices, remove the jumper shown in the diagrams below.
1. Turn the screw counterclockwise to loosen.
2. Pull the jumper completely out of the drive chassis.
3. Tighten the screw to keep it in place.
ATTENTION: PowerFlex 520-Series drives contain protective MOVs that are referenced to ground. These devices must be
disconnected if the drive is installed on an ungrounded or resistive grounded distribution system.
ATTENTION: Removing MOVs in drives with an embedded filter will also disconnect the filter capacitor from earth ground.
Altitude (m)
Percentage of Rated Current (%)
40
90
100
110
120
80
70
60
50
0
4000
300020001000
Altitude (m)
Ambient Temperature (°C)
20
50
60
40
30
0
4000
300020001000
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