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2.1. Setup the UPS
Installation and wiring must be performed in accordance with the local electric
laws/regulations and execute the following instructions by professional personnel.
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There is no standard feedback protection inside the UPS. However, there are relays in the input
to cut the line voltage and while the neutral is still connected to the UPS.
Input relay diagram
•
This UPS should be connected with T N 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.
•
U se 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 .
•
C onnect grounding terminal of UPS to a grounding electrode conductor.
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I n 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).
There can be no derivation in the line that goes from the «Backfeed Protection» to the UPS,
as the standard safety would be infringed.
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W arning 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:
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T hen check for Hazardous Voltage between all terminals including the protected earth
Before working on this circuit
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I solate Uninterruptible Power Supply (UPS)
Risk of Voltage Backfeed
ON-LINE 3P/3P
P H 9273 - PH 9293 .
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