Rpa Parallel System Connection; Power Wiring Of Parallel Units - GE TLE series 600 User Manual

5.10 RPA PARALLEL SYSTEM CONNECTION

WARNING !
This operation must be performed by trained personnel before the initial start-up
(ensure that the UPS installation is completely powered down).

5.10.1 Power wiring of parallel units

To guarantee good Load sharing between the units of a Parallel System, we recommend that the cable
length from the input distribution board (5) to the output distribution board (9) is equal for each unit (a+b
= c+d = e+f = g+h = i+l = m+n = o+p = q+r).
Tolerance: +/-10%.
The AC input power of the Bypass must be the same for all units of the Parallel System - no phase shift
allowed between units.
NOTE !
It is strongly recommended that no transformers, automatic circuit breakers or
fuses should be inserted between the unit's output and the Load common bus bars.
However, it is recommended that a disconnection or isolation switch is installed in
order to totally isolate a unit if needed.
Verify that power wiring and control wiring run in separate conduits or cable trays.
The power wiring requires two separate conduits: one for input and one for output cables.
Fig. 5.10.1-1 Power wiring of RPA Parallel System
Modifications reserved
GE_UPS_OPM_TLE_SCE_M60_M80_1GB_V020.docx
Critical Power
1
2
3
4
5
6
7
8






= Rectifier
= Inverter
= Automatic Bypass
= Mains Input Distribution
= Unit Output Load
= External Battery MCB
= External Battery
Common bus bar and
=
Output Load Distribution
= UPS number 1
= UPS number 2
= UPS number 3
= UPS number 4
= UPS number 5
= UPS number 6
Page 63/146
User Manual TLE Series 600 & 800 CE S1