Ups Parallel Connections (Option) - Ablerex KRONOS Series Installation And Operation Manual

2.7

UPS Parallel Connections (Option)

The UPS can be operated in parallel for extend the capacity and enhances system
reliability.
 Up to 6 UPS units can be operated in parallel.
 To make sure each UPS is equipped with parallel card (Option).
 The size and length of the input and output cables must be identical for all UPS units.
 The phase rotation must be the same for each UPS unit.
 It is recommended to use an external bypass cabinet to facilitate maintenance and
system testing for parallel operation system.
 Parallel configuration must be performed by authorized and qualified technicians
who are familiar with this UPS.
 Parallel communication cables are requested to connect to UPS each other.
 Please only use the parallel communication cables which are supplied with UPS
manufacturer for ensure UPS can operate correctly in a parallel configuration.
 The parallel communication cables must be connected in a ring topology, and the
maximum total length of the parallel communication cables must be less than 38
meters. To ensure good communication quality you must set the Switch & SW3 of
the two farthest UPS to the "ON" position as shown in below. (Please reference to
section 2.6 for SW3)
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