Connection Warning; Operation - PROLiNK Master II Series User Manual

1-4. Connection Warning

•
There is no standard feedback protection inside the UPS. However, there is a relay at the Input to cut
the voltage off line and when neutral it is still connected to the UPS.
Main
Input
•
This UPS must be connected to the TN grounding system.
•
The power input for this unit should be rated three-phase according to the nameplate of the equipment.
It must also be properly grounded.
HIGH LEAKAGE CURRENT
EARTH CONNECTION ESSENTIAL
BEFORE CONNECTING SUPPLY
•
The use of this equipment in medical instruments of any life support equipment where the failure of this
equipment could reasonably be expected to cause the failure of the life support equipment or
significantly affect its safety or effectiveness is not recommended. Do not use this equipment if there is a
flammable mixture with air, oxygen, or nitrous oxide.
•
Connect the UPS ground terminal to the earth electrode conductor.
•
In accordance with the EN-IEC 62040-1 safety standard, the installation must be equipped with a
《Backfeed Protection》system, e.g. a contactor, which will prevent the appearance of harmful voltage
or energy on the input power source during a power interruption (follow the wiring diagram «Backfeed
Protection» depending on whether the equipment uses a signal or a three-phase input).
There should be no derivatives in the line switching from « Feedback Protection » to the UPS, as
safety standards will be violated.
•
Warning labels should be placed on all main power switches installed at a place away from the unit to
notify electrical maintenance personnel of the presence of UPS in the circuit. The label will contain the
-
Isolating the Uninterruptible Power Supply (UPS)
-
Then check the Hazardous Voltage between all terminals including the protected
ground
Risk of Voltage Feedback
following text or equivalent

1- 5 . Operation

Do not disconnect grounding/earthing conductor cables on UPS or cable terminals
building under any circumstances.
The UPS system displays its own internal current source (battery). UPS output socket or
the output terminal block may be power-supplied even if the UPS system is not connected to the
cable
electricity/building electricity. ( only for standard models).
To completely disconnect the UPS system, first press the "OFF" button and then
Unplug the power/power cord.
Input Rly
L1
L2
UPS
L3
N
Input relay diagram
WARNING
Before working on this circuit
Input Rly
L1
Main
Input
L2
L3
N
Input Rly
L1
Bypass
Input
L2
L3
N
Relay diagram Inputs for Dual Input Models
2
UPS