INFOSEC UPS SYSTEM – 15, rue du Moulin – 44880 Sautron – France – www.infosec-ups.com
hotline : +33 (0)2 40 76 15 82 – fax : +33(0)2 40 94 29 51 – hotline@infosec.fr – 07 19 AA 59 205 03
There is no standard backfeed protection inside, please isolate the UPS before working according to
this circuit. The isolation device must be able to carry the UPS input current.
Main
Input
Input Rly
UPS
L1
L2
L3
N
Main
Input
Input Rly
UPS
L1
L2
L3
N
Bypass
Input
Input Rly
L1
L2
L3
N
This UPS should be connected with TN grounding/earthing system.
• In accordance with safety standard EN-IEC 62040-1, installation has to be provided with a《Backfeed
Protection》system, as for example a contactor, which will prevent the appearance of
voltage or dangerous energy in the input mains during a mains fault (see figure 24 and
respect the wiring diagram of «Backfeed Protection»depending if the equipment is with
single or three phase input).
• The power supply for this unit must be three-phase rated in accordance with the equipment nameplate.
It also must be suitably grounded.
• Use of this equipment in life support applications where failure of this equipment can reasonably be
expected to cause the failure of the life support equipment or to significantly affect its safety or
effectiveness is not recommended. Do not use this equipment in the presence of a flammable
anesthetic mixture with air, oxygen or nitrous oxide.
• Connect your UPS power module’s grounding terminal to a grounding electrode conductor.
• This is a product for commercial and industrial application in the second environment –installation
restriction or additional measures may be needed to prevent disturbances.
• Warning labels should be placed on all primary power switches installed in places away from the device
to alert the electrical maintenance personnel of the presence of a UPS in the circuit. The label will bear
the following or an equivalent text:
Before working on this circuit
- Isolate Uninterruptible Power System (UPS)
- Then check for Hazardous Voltage between all
terminals including the protective earth.
Risk of Voltage Backfeed
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