ZGR VERSATILE RT - 10 KVA
Manual de operaciones
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UPS in parallel
The basic installation procedure of a parallel system comprising of two or more UPS modules is similar than a
single module system.
A group of paralleled modules behave as one large UPS system but with the advantage of presenting higher
reliability.
A single or multiple battery group can be installed by follow method:
- Individual battery group each UPS
- Common battery group in parallel to whole system
This setting will be stored during manufacturing or can be changed by authorized Service Support.
The following sections introduce the installation procedures specified to the parallel system.
In order to assure that all modules 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 Bypass and the Main input sources must be follow the same phase secuence.
3)
The Bypass and the Main input sources must be referenced to the same middle point potential. (neutral)
4)
The outputs of all the UPS modules must be connected to a common output bus. (L+N+PE)
5)
In case of common battery system, BAT + / BAT N / BAT must be wired correctly between all UPS.
6)
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.
4.5.1
Cabinet installation
Connect all the UPSes needed to be put into parallel system as below picture (Fig. 4-8).
Fig. 4-8 Cabinet installation
- Place all UPS modules together.
- Let minimum rear separation to allow correct ventilation, as especified in general installation procedure.
- Be sure all input and and output breakers are in OFF position until initial startup..
- Be sure battery cabinet breaker is OFF until initial startup.