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Overcurrent Protection Devices:
All Dell UPS Rack Mount Models (except 5600W Online):
In all cases the installation should include a dedicated electrical branch circuit with a 2-pole overcurrent protection
device. The breaker should be wall-mounted and accessible to the operator.
5600W Online UPS only:
The 5600W online UPS does not have an automatic protection device against current backfeed. Dell recommends
installing an external isolating device (see illustration below). After the device is installed, you must add a warning
label with the following wording or the equivalent on the external AC contactor:
"
RISK OF VOLTAGE BACKFEED. Isolate the UPS before operating on this circuit, then check for hazardous voltage between all
terminals."
The following table lists AC contactors that can be used as backfeed protection devices.
Manufacturer
Moeller GMBH
Tianshui Electrical Aparatus Co. Ltd (E203071)
LS Industrial Systems Co., Ltd. (E108780)
Dell UPS Site Preparation Guide, EMEA (230V)
Type
DILM(C)32-10
GSC1(CJX4-d)-4011
GMC(D)-32
Rating
600 V, 40A
220-240 Vac, 42 FLA
600 Vac, 45A
Revision 1, February 2012
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