KE RT Series UPS 6-10kVA UL 208-220-230-240Vac User Guide English 20180130 This manual is for qualified personnel only
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Ensure 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 certain the N and L lines are correctly connected, and ensure
grounding is secure. Install and secure grounding before all other
connections are made.
4.9
Parallel cable installation
Shielded and double insulated control cables available must be interconnected in a ring configuration
between UPS modules as shown below. The parallel control board is mounted on each UPS module.
The ring configuration ensure reliability of the control.
4.10
Requirement for the parallel system
For a group of paralleled modules behave as one large UPS system and in order to assure that all
modules are equally utilized and comply with relevant wiring rules, follow the requirements below:
1) All UPS must be of the same rating and be connected to the same bypass source.
2) The Bypass and Mains input sources must be referenced to the same neutral potential.
3) The outputs of all the UPS modules must be connected to a common output bus.
4) The length and specification of power cables including the bypass input cables and the UPS output
cables must be the same. This facilitates load sharing when operating in bypass mode.
