Kollmorgen MMC Smart Drive Series, Руководство по оборудованию

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Kollmorgen - June 2014 41
MMC Smart Drive Hardware Manual
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SYSTEM POWER DEVICES
4.2.3 24VDC Input Power Protection (460V SD Only)
4.2.4 S200-DLS Drive Protection Requirements
Although these drives provide solid state motor overload protection at 125% of the
rated FLA Current and short circuit protection, this Integral solid state short circuit
protection does not provide branch circuit protection.
For installation in the United States, branch circuit protection must be provided in
accordance with the National Electrical Code and any applicable local codes.
For installation in Canada, branch circuit protection must be provided in accordance
with the Canada Electrical Code and any applicable provincial codes
Two types of Protection must be provided in case the S200-DLS Drive malfunctions:
•
Short Circuit Protection - this protection helps minimize damage to the Smart
Drive in the case of a Short Circuit condition. Short Circuit Protection is required to
meet UL508C requirements.
•
Branch Circuit Over Current Protection - this protection helps minimize damage to
the Smart Drive and helps protect the wiring between the Smart Drive and the
Over Current Protection Device in the case of a sustained Over Current condition.
Over Current Protection must be provided in accordance with NFPA 79 7.2.3 and
7.2.10. Supplemental UL1007 protectors
shall not be used to provide Branch Cir-
cuit Protection.
When using the S200-DLS Drive, the fuse that provides Short Circuit Protection also
provides Over Current Circuit Protection, therefore a separate Short Circuit Protection
fuse is not required.
Two types of fuses are defined for use with the S200-DLS Drive:
Non-restricted - If the Branch Circuit supplying power to the drive is capable of
delivering no more then 5,000 RMS symetrical short circuit amperes (250V
maximum), the fuse type provided for Protection has no “Clearing I
2
t” restrictions, and
must meet the following requirements:
•
have a current rating no greater than the “Maximum Fuse Size” in Table 4-3
CAUTION
A possible ignition hazard within the MMC 460V Smart Drives exists if exces-
sive current is drawn from the 24 VDC powering the MMC Smart Drive. To
prevent this possibility (due to improper wiring or 24 VDC supply failure), a
fuse should be used in series with the 24 VDC to the MMC Smart Drive. Spe-
cifically, a 4 A max. “UL248 Series” fuse should be used. In addition, the 24
VDC shall be supplied by an isolating source such that the maximum open cir-
cuit voltage available to the MMC Smart Drive is not more than 30 VDC.
NOTE
The S200-DLS Drives are suitable for use on a branch circuit capable of de-
livering not more than 5,000 RMS symmetrical Amperes, 250 Volts maxi-
mum.