Connection Warnings - Njoy Ranger 30KT User Manual

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 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.
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 (respect the wiring diagram of «Backfeed Protection»
depending if the equipment is with signal or three phase input).
NOTE!
There can be no derivation in the line that goes from the «Backfeed Protection» to
the UPS, as the standard safety would be infringed.
• Warning labels should be placed on all primary power switches installed
in places away from the unit 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:
6
Input Rly
Main
L1
Input
L2
L3
N
Input Rly
Bypass
L1
Input
L2
L3
N
3:3 phase
Main
Input
UPS
Bypass
Input
Input Rly
L1
L2
L3
N
UPS
Input Rly
Input Rly
L1
N
3:1 phase
M
In
By
In