LEGRAND STARK 10 kVA, Installation And User Manual, Page: 15 / 52

15
Make sure each UPS input breaker is in “off” position and there is no any output from each
UPS connected. Battery groups can be connected separately or in parallel, which means
the system itself provides both separate battery and common battery.
WARNING:
Make sure the N, A (L1), B (L2), C (L3) lines are correct,
and grounding is well connected.
3.10 COMPUTER ACCESS
3.9.2 Parallel cable installation
3.9.3 Requirement for the parallel system
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.
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.
ώ
One end of a USB cable connect to the computer, the other end connect to the USB
port on the UPS.
ώ
Open the software Muser4000, click “system” button.