Aplus PlusIII-10KLRB, User Manual

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6.2 ConverterFunction
6.2.1 Brief introduction of Converter function
In converter mode, the UPS would free run with fixed output frequency (50Hz or 60Hz). Once
the mainspoweris loss or abnormal, the UPS would transfer to Battery mode and the load is
supplied continuously.
The great virtue is the output frequency is fixed, which is required by some very sensitive loads.
But the disadvantage is the load capacity of UPS should be derated to 60% in converter mode.
6.2.2 Set the function
The function could be enabled through the LCD settingin Bypass mode.
Enter the power strategy setting menu by following chapter of 5.4.7.
6.3Parallel Function
6.3.1 Brief introduction of the redundancy
N+X is currently the most reliable power supply structure. N represents the minimum UPS
number that the total load needs,X represents the redundant UPS number, i.e. the fault UPS
number that the system can handle simultaneously. When the X islarger,the reliability of the
power systemis higher. For occasions where reliability is highly depended on, N+X is the
optimal mode.
As long as the UPS is equipped with parallel cables, up to 4 UPSs can be connected in parallel
to realize output power sharing and power redundancy.
6.3.2 Parallel installationand operation
How to install a new parallel UPS system:
1) Before installing a new parallel UPS system, user need to prepare the input and output
wires, the output breaker, and the parallel cable.
2) Users need to usea standard 25-pin communication cable, which should have 25 cores,
corresponding stitches and shield, as the UPSparallel cable. The length of the parallel
cable is appropriate to be less than 3m.
3) Remove the cover plate of the parallel port on the UPS, connect each UPS one by one
with the parallel cable, and re-screw theParallel port coverwhich is supplied in the
accessories.
4) Strictly follow the chapter of 4, the wiring requirement of single UPS to perform the