Dell UPS Site Preparation Guide, EMEA (230V)
Revision 1, February 2012
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
Type
Rating
Moeller GMBH
DILM(C)32-10
600 V, 40A
Tianshui Electrical Aparatus Co. Ltd (E203071)
GSC1(CJX4-d)-4011
220-240 Vac, 42 FLA
LS Industrial Systems Co., Ltd. (E108780)
GMC(D)-32
600 Vac, 45A