16
T1
C1
C2
B1
7 – Parallel Redundancy Operation (Optional)
DANGER! LETHAL HIGH VOLTAGE HAZARD!
All wiring should be performed by a qualified electrician, in accordance with the warnings in this manual and all applicable
electrical and safety codes. Incorrect wiring may cause serious personal injury and property damage. Read, study and
understand the warnings listed in
Section 2 – Important Safety Instructions
before proceeding.
Unpacking the Parallel Kit
The parallel kit should include these parts:
• 2 RJ45 Parallel Communication Cables
C1
,
C2
• 1 Parallel Communication Bracket
B1
• 1 Cable Tie
T1
UPS System Placement
In order to minimize the possibility of damage to the UPS system and maximize its operational lifespan, follow the location warnings listed in
Section 2 – Important Safety Instructions
. Remember to keep at least 30 cm clearance from the rear panel of the UPS system to the wall and
do not block any of the UPS system’s front or rear ventilation openings.
Warning: The UPS system is very heavy—be careful when moving or lifting it.
Installation
1. To avoid noise interference, install each wire and cable separately to the input, output and battery.
2. Keep all input, output and battery wires and cables away from all connecting wires for parallel functions and control signals, including RJ45,
RS-232, RS-485, USB and EPO. If this is not possible, set them at 90° angles or at least 20 cm apart.
3.
Warning: The UPS system includes an EMI filter. To prevent potential leakage of hazardous current, confirm that the AC supply
circuit is securely grounded.
Start-up Procedure
1. Position the UPS systems as specified above.
2. Connect the parallel communication cables
C1
,
C2
to the “Ring” loop at a maximum length of 7 m. Secure the cables with the parallel
communication brackets
B1
.
3. Arrange the power cables and the control signal cables according to UPS type. Make sure that all circuit breakers at the input and output
ends are set to OFF.
4. For maintenance purposes, you may wish to purchase a manual bypass master panel (optional).
5. Set the terminal resistors of only two parallel UPS systems to the ON position. (For three units in parallel, switch on the terminal resistors of
UPS #1 and #3 only. For four units in parallel, switch on the terminal resistors of UPS #1 and #4 only.)
6. Turn on the utility input breaker. Configure each UPS system’s operating mode to parallel mode (P 02) and set the IDs (e.g. UPS 1, ID=1) of
the respective UPS systems. (
See Section 6-6 – UPS System Settings and Measurements
.) All parallel UPS system parameters except ID
number must be same, including the number and type of connected battery packs.
7. If an external manual bypass master panel (optional) is installed, make sure the switch is in the “Bypass” position. Check to see if the UPS
system is in bypass mode with output voltage available.
8. Turn on the output breaker and ensure that the connected loads are supplied with power via the manual bypass master panel.
9. Turn on the output breaker of the UPS and turn the switch of the manual bypass master panel to “UPS” position. The connected loads will
be supplied with power via the UPS bypass loop.
10. Turn on each UPS system individually and make sure it is in inverter supply (normal) mode. Installation is now complete.
