Kohler PowerWAVE 8000DPA RI (S2) Series, Руководство пользователя, Страница: 14 / 88

2: General Description
6
TS_616_08 PW8000DPA ST (S2) User Manual 21/4/22
Figure 2.2 Parallel system control
‘Capacity’ parallel system
When a system is described as being a ‘capacity system’ it implies that the potential full load requires ALL the paralleled
UPS modules to be operational – i.e. if one module trips off line due to a fault, the remaining modules will be unable to
supply the load demand and will automatically transfer the load to the bypass supply, where it will no longer be protected
against supply aberrations.
‘Redundant’ parallel system
If a system is designed with module redundancy it must contain at least one UPS module over and above that necessary
to power the applied load.
Using the example given above, four fully populated ST-80 cabinets (16 modules = 320 kW) would present one redundant
module for a 300 kW load. Under normal circumstances with all 16 power modules on-inverter they would each provide
18.75kW when full load is applied, but if one module fails or is taken off-line, the remaining 15 modules can sustain the
load by each providing their rated 20 kW output.
Clearly, the ability to lose one UPS module yet still supply the rated load with processed, backed-up power significantly
increases the overall system reliability.
Note: A parallel system operating with one redundant module is known as an ‘ N+1’ system.
STATIC
SWITCH
INVE RTER RECTIFIER
Parallel Control Logic
UPS Module 06 CHARGER
STATIC
SWITCH
INVE RTER RECTIFIER
ParallelCont rolLogic
UPS Module 07 CHARGER
ParallelCont rolLogic
UPS Module 08
ParallelCont rolLogic
UPS Module 09
ParallelCont rolLogic
UPS Module 10
U PS CABINET 2
STATIC
SWITCH
INVE RTER RECTIFIER
Parallel Control Logic
UPS Module 01 CHARGER
STATIC
SWITCH
INVE RTER RECTIFIER
ParallelCont rolLogic
UPS Module 02 CHARGER
ParallelCont rolLogic
UPS Module 03
ParallelCont rolLogic
UPS Module 04
ParallelCont rolLogic
UPS Module 05
U PS CABINET 1
Parallel Adapter Board
To JD5 in UPS CABINET 3
JD5 JD6
Parallel Adapter Board
JD5 JD6