Parker Hannifin
Appendix A Additional Specifications 173
Current Foldback
The Aries drive’s current foldback circuit helps to protect the drive from
damage due to prolonged high currents.
If your Drive is operating above its continuous current rating, see Figure 51 to
predict the number of seconds until foldback will occur. For example, the
figure shows that at the Aries drive’s peak current rating (250% of
continuous), foldback will occur after six seconds. After operating at the
drive’s peak current, the drive will reduce the drive current to 80% of the
drive’s continuous rating for 60 seconds. This is to ensure the drive’s
average continuous current rating is not exceeded.
Figure 51 Time until current foldback occurs
Cables EMC Ready Cables
Many Parker cables are EMC installation ready. If installed according to
instructions provided under “A Highly-Immune, Low-Emission Installation –
Meeting the Requirements of the Electromagnetic Compatibility (EMC)
Directive” on page 192, these cables are designed to aid the user in gaining
European Compliance, and are thus an integral part of a CE system solution.
EMC cables add RF screening and bonding to reduce emissions, increase
immunity, and provide high integrity safety Earth bonding. They also help to
reduce problems in high electrical noise environments.
Non-EMC Cables
Parker also offers non-EMC cables, for applications where CE compliance is
not required, and where ambient electrical noise does not cause problems.
Because these cables are either unshielded, or contain simple foil shielding
terminated by a drain wire, they do not provide significant shielding of
electrical noise at high frequencies.