Njoy Ranger 30KR User Manual page 4

1.4 Connection Warnings
There is no standard backfeed protection inside of the UPS. However,
there are relays on the Input to cut off line voltage and while the neutral is
still connect to UPS.
This UPS should be connected with TN grounding/earthing system.
The power input for this unit must be three-phase rated in accordance
with the equipment nameplate. It also must be suitably grounded.
Input Rly
L1
Main
Input
L2
L3
N
Input relay diagram
WARNING
HIGH LEAKAGE CURRENT! EARTH CONNECTION ESSENTIAL
BEFORE CONNECTING SUPPLY.
Use of this equipment in medical instrument of any life-sustaining
equipment where failure of this equipment can reasonably be expected to
cause the failure of the life-sustaining equipment or to significantly affect
its safety or effectiveness is not recommended. Do not use this equipment
in the presence of a flammable mixture with air, oxygen or nitrous oxide.
Connect grounding terminal of UPS to a grounding electrode conductor.
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
signal or three phase input).
4
Bypass
UPS
Input
Input Rly
Main
L1
Input
L2
L3
N
Input Rly
L1
L2
L3
N
Input relay diagram for
dual-input model
UPS