MSG11-5715-743/EN: AC20F Series - Hardware Installation Manual
MSG11-5715-743/EN 24.04.2023
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11.3
North American & Canadian Compliance
North American Compliance
This product is certified under the US governments Occupational Safety and Health Administration’s
(OHSA), Nationally Recognised Testing Laboratory (NRTL) program. An NRTL is a private third-party
organisation accredited by OSHA to test and certify products to national standards for compliance with
North American requirements.
Canadian Compliance
Products have been approved to UL61800-5-1
– Adjustable Speed Electrical Power Drive Systems – Part
5-1: Safety Requirements
– Electrical, Thermal and Energy, and to the Canadian Standard CSA 22.2 No.
274 - Adjustable speed drives.
North American & Canadian Compliance Information
Perspective Short-Circuit Current (PSCC) Supply Ratings
The inverters have been designed to operate on the following PSCC supply ratings:
Frame
Size
PSCC Rating
(A
rms
, Symmetrical Amperes, 480 V Maximum)
2
50,000
3
50,000
4
50,000
5
50,000
6
50,000
7
50,000
8
50,000
9
50,000
10
50,000
Where inverters are to be used on higher rated supplies, refer to
‘Chapter 7: Associated Equipment’ for
recommended AC line chokes.
Branch Circuit Protection
It is recommended that UL Listed fuses are installed upstream of the drive. Branch circuit protection must
be provided in accordance with the latest edition of the National Electrical Code NEC/NFPA-70.
Refer to
‘Chapter 7: Associated Equipment’ for recommended fuse ratings.
Solid State Short-Circuit Protection
The inverter provides Solid-State Short-Circuit (output) protection.
Solid State Motor Overload Protection
The inverter provides Class 10 motor overload protection. The internal overload protection level (current
limit) is 150 % for 60 seconds.
Refer to
‘DOC-0017-13, Chapter 10: Programming Your Application’ for more information on the current
limit operation and user adjustment.
An external motor overload protective device must be provided by the installer where the motor has a full-
load Ampere rating of less than 50 % of the drive output rating or when the
Disable Stall
trip is enabled; or
when the
Stall time
parameter is increased above 480 seconds.
Refer to
‘DOC-0017-13, Chapter 10: Programming Your Application’ for more information on the stall trip.
