Mechanical Installation; Design Recommendations - Parker 590+ DRV Product Manual

Mechanical Installation

IMPORTANT
Refer to "Installation Drawings", page 3-51 for further information.
The DC590+ DRV Digital drive is designed to be relatively simple to install. You should review these procedures before beginning them. If you do not
understand the instructions or are unsure of your ability to perform the procedures, contact Parker SSD Product Support.

Design Recommendations

The DC590+ DRV is only part of a motor control system. Other parts may include an isolation transformer, branch circuit protection, line reactor and
motor. If properly selected and installed, you can assure your process of trouble-free operation.
NOTE
Read Appendix B : "Certification" for details meeting UL, cUL, and CE certification The chapter contains specific requirements concerning
wiring practices and auxiliary equipment.
Isolation Transformer
DC drives require 3% reactance for proper operation. An isolation transformer can supply this. Select a DELTA-WYE style transformer with a
grounded neutral conductor. If the transformer supplies other equipment, verify that the load is balanced on all legs and is rated for the total load.
Line Reactor
When several drives are connected to an isolation transformer, Parker SSD Drives recommends adding a line reactor for each drive. This prevents
SCR line notching from affecting other drives and control equipment.
Branch Circuit Protection
You must provide branch circuit protection to protect the three-phase supply cabling. Circuit breakers or fuses are often used for this purpose. When
choosing the device, the AC current for the drive is 0.83 x DC Armature Current. Local electrical codes may require an additional safety margin.
Control Supply
The 120 VAC control supply for the drive is often used to power other control equipment. Make sure that the drive supply is properly filtered to avoid
unexpected faults caused by the control supply. Filtering is often accomplished using RC snubbers across AC contactor coils and blocking diodes
across DC contactor coils.
Motor Thermistors
Parker SSD Drives recommends choosing motors with temperature sensitive resistors or switches in the field and interpole windings. These
inexpensive devices, often called thermistors or thermostats, protect against motor over-temperature failures. Connect them in series between terminals
TH1 and TH2 on the drive.
Thermistors must have a combined working resistance of 750 Ohms or less, rising to 4000 ohms at over-temperature. They are classified by IEC34-II
as Mark A.
DC590+ DRV Series DC Digital Drive
3-1
Installing the Drive