Kollmorgen MMC Smart Drive

40 Kollmorgen - December 2011
MMC Smart Drive Hardware Manual - SYSTEM POWER DEVICES
• meet both of the requirements for a non-restricted fuse (above)
• be a Class RK1, J, or CC dual element current limiting fuse
4.2.4 460V Smart Drive Protection Requirements
Two types of Protection must be provided in case the Smart 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.
Two types of fuses are defined for use with the 460V Smart 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 (480V
maximum), the fuse type provided for Protection has no “Clearance 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
• have an interrupt capability no less than the short circuit rating (Prospective Short-
circuit Symetrical Amperes) of the Branch Circuit supplying the drive.
Restricted - If the Branch Circuit supplying power to the drive is capable of delivering
between 5,000 and 100,000 RMS symetrical short circuit amperes (480V maximum),
the fuse type provided for Protection has “Clearance I
2
t” restrictions, and must meet
the following requirements:
• meet both of the requirements for a non-restricted fuse (above)
• have a “Clearance I
2
t” rating no greater than the “”Clearance I
2
t” rating in Table 4-
3
Table 4-2: 230V Smart Drive Protection Devices
230V Drive Model
a
a. Drive model pertains to Analog (no dash suffix) and Digital (-D & -DN) versions
Maximum Fuse Size
b
Single Phase (Three Phase)
b. This is the maximum fuse size that can be used for Device Protection
V
IN
= 120VAC V
IN
= 230VAC
MMC-SD-0.5-230 12A (12A) 12A (12A)
MMC-SD-1.0-230 15A (15A) 15A (15A)
MMC-SD-2.0-230 30A (25A) 30A (25A)
MMC-SD-3.0-230 30A (25A) 30A (25A)