GE 30 Manual De Usuario
g
GE
OPM_SGS_USM_10K_40K_0US_V010.doc
16/88 Operating
Manual
SG Series 10, 20, 30 & 40 kVA
3.4
RECTIFIERS PARALLELED ON THE SAME BATTERY
A parallel system with a Common Battery for two or more Rectifiers,
requires a particular installation and adequate setting of some
parameters, (accessible only through password), and can therefore
only be done by a qualified engineer from GE.
requires a particular installation and adequate setting of some
parameters, (accessible only through password), and can therefore
only be done by a qualified engineer from GE.
Usually each Rectifier-Inverter Unit runs with its own Battery.
In case of parallel units are running with a Common Battery (max. 4 UPS - see Fig 4.12-1), the
sharing circuit between individual Rectifier is integrated in the communication bus of the
system in order to assure an equal sharing of the Rectifiers output currents.
In case of parallel units are running with a Common Battery (max. 4 UPS - see Fig 4.12-1), the
sharing circuit between individual Rectifier is integrated in the communication bus of the
system in order to assure an equal sharing of the Rectifiers output currents.
Fig. 3.4-1 Diagram RPA system with Rectifiers on Common Battery
1 –
2 –
3 –
4 –
5 –
6 –
7 –
8 –
Rectifier
Inverter
Automatic Bypass
Manual Bypass
Mains Power
Load Bus Bar
External Battery Fuse
Battery
Pay attention to the following recommendations:
•
The units delivered for this functioning mode needs a special parameters setting, so they
must be prepared in advance before the installation.
must be prepared in advance before the installation.
•
The installation must be performed only with the UPS system must be completely shut
down.
down.
•
The AC Rectifiers input power (5) must be the same, with clockwise phase rotation for each
unit.
unit.
•
Each Rectifier must be set for the same floating DC voltage and the same Battery current
limitation.
limitation.
•
It is recommended to install the fuses / MCB (7) on each line connecting the Rectifiers to
the common Battery for maintenance / safety reasons.
the common Battery for maintenance / safety reasons.
•
In case one must be powered down for maintenance, switch-OFF the concerned unit before
open the DC fuses / MCB on the Battery line (7).
open the DC fuses / MCB on the Battery line (7).
•
It is recommended to connect an external NO free contact “Battery Fuses” to the UPS and
to enable the function by setting the parameter (see Section 7.1).
to enable the function by setting the parameter (see Section 7.1).
•
If an emergency generator set supply the UPS, and the free contact “Generator ON” is
connected to the Customer interface, connect a separate NO free contact on each parallel
unit.
connected to the Customer interface, connect a separate NO free contact on each parallel
unit.
•
The parameters enabling the Battery test, both manual and automatic, must be set in the
same mode on all the units having the Rectifiers on Common Battery.
same mode on all the units having the Rectifiers on Common Battery.
•
Do not connect the temperature sensor for automatic battery floating voltage compensation.
•
Do not enable the function Boost charge (parameter 87).