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3.9.2 Parallel cable installation
Shielded and double insulated control cables available must be interconnected in a ring
configuration between UPS units as shown below. The ring configuration ensures high reliability of
the control.
3.9.3 Requirement for the parallel system
A group of paralleled UPS behaves as one large UPS system but with the advantage of
presenting higher reliability. In order to assure that all UPS are equally utilized and comply with
relevant wiring rules, please follow the requirements below:
1) All UPS must be of the same rating and be connected to the same bypass source.
2) The outputs of all the UPS must be connected to a common output bus.
3) The length and specification of power cables including the bypass input cables and the UPS
output cables should be the same. This facilitates load sharing when operating in bypass
mode.
3.10 Computer access
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One end of a USB cable connect to the computer, the other end connect to the USB port on
the UPS.
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Open the software Muser4000, click “system” button.
