Marathon Power Tri-Athlon ATWN-10003-02, Руководство пользователя

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3.9
UPS Parallel Installation
The following sections describe the installation procedure for parallel installation.
3.9.1 Cabinet Installation
Connect UPS’s as follows for parallel operation:
Ensure that each UPS input breaker is OFF and that there is no output connection from each
UPS. Battery groups can be connected separately or in parallel, meaning that the system
provides both separate batteries and common batteries.
3.9.2 Parallel Cable Installation
Shielded and double insulated control cables must be interconnected in a ring configuration
between the UPS’s as shown below. The ring configuration ensures high control reliability.
3.9.3 Requirements for the Parallel System
Paralleled UPS’s perform as one large UPS system with the advantage of higher reliability. The
following is required in order to assure that all UPS’s are equally utilized and comply with code:
1) All the UPS’s must be of the same rating and connected to the same bypass source.
2) The outputs of all the UPS’s 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.