UPS for 400 Vac Grid, Installation Guide, doc. rel. 3.0
77
6.1.2.1.
EPO and parallel operation
An EPO switch can also be used if you intend to operate multiple UPS units in parallel. An external
n-pole / N.O. EPO switch may be connected according to the connection schematic.
EPO disconnection of the parallel units
MUST BE SIMULTANEOUS!
EPO wiring
and switch rating must be 5 A / 120 Vac.
6.1.2.2.
Common vs. Decentralized battery
Gamatronic UPS systems running in parallel can be setup in one of two ways to batteries.
1.
Common battery.
Is a single battery connection that is shared between all the UPS
systems that are running in parallel.
2.
Decentralized battery.
Is a separate battery bank per unit.
6.2.
Instructions for Parallel Configuration
Best practice UPS configuration in multi-system mode includes the following
stages:
1.
Independently verify each UPS and its functionally as a standalone.
2.
Configure the UPSs to operate in parallel in multi-system mode.
In a parallel UPS configuration, the length of the bypass input cable must be the
same on all of the UPSs, and the bypass input cables must be at least 10 meters
long.