118 Unidrive M / HS Frame 7 to 10 Power Installation Guide
Issue Number: 5
6.9 External Class 2 supply
The external power supply used to power the 24 V control circuit shall be marked: "UL Class 2". The
power supply voltage shall not exceed 24 Vdc.
6.10 Requirement for Transient Surge Suppression
This requirement applies to drives with rated input voltage = 575 V, Frame Size 7 only.
TRANSIENT SURGE SUPPRESSION SHALL BE INSTALLED ON THE LINE SIDE OF THIS
EQUIPMENT AND SHALL BE RATED 575 Vac (PHASE TO GROUND), 575 Vac (PHASE TO
PHASE), SUITABLE FOR OVERVOLTAGE CATEGORY III, AND SHALL PROVIDE PROTECTION
FOR A RATED IMPULSE VOLTAGE TO WITHSTAND VOLTAGE PEAK OF 6 kV AND A CLAMPING
VOLTAGE OF MAXIMUM 2400 V.
6.11 Group Installation and Modular Drive Systems
Drives with DC+ and DC- supply connections, with 230 V or 480 V supply voltage rating, are UL
approved for use in modular drive systems as inverters when supplied by the converter sections:
Mentor MP25A, 45A, 75A, 105A, 155A or 210A range manufactured by Emerson Industrial
Automation.
Alternatively, the inverters may be supplied by converters from the Unidrive-M range manufactured
by Emerson Industrial Automation.
In these applications the inverters are required to be additionally protected by supplemental fuses.
Drives have not been evaluated for other Group Installation applications, for example where a single
inverter is wired directly to two or more motors. In these applications, additional thermal overload
protection is needed. Contact Emerson Industrial Automation for further details.
Unidrive M frame7 to 10 Power Installation Guide issue5.book Page 118 Tuesday, May 24, 2016 11:52 AM
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