Eaton 9155 8-15 kVA.pdf - 第42页
UPS 8 – 15 kV A, 230V 50/60 Hz output User ’ s Guide 1 022403 Revision D 42 Tie cabinets The T ie Cabinets (TCs), provided by UPS manufacturer , has input connections up to three parallel UPS modules. It is also possible…
UPS 8 – 15 kVA, 230V 50/60 Hz output
User’s Guide
1022403
Revision D
41
9. Parallel systems
Overview
Parallel UPS configurations are recognised as either redundancy or capacity systems. The
redundancy system is used to improve the system reliability with N+1 redundant UPS module.
The capacity system for its part provides the maximum output power without focusing to the
highest system reliability.
A parameter selection is used to switch between the redundancy and capacity modes. It is
important to remember that the mode is affecting to the output power rating and overall system
reliability.
UPS modules of the parallel system share equally the load with Hot Sync
®
technology. The
parallel outputs can be combined in a System Parallel Module or cabinet. It is the system
component containing the obligatory service switches. Customer’s low-voltage distribution
panel can also be used instead of the System Parallel Module. In the redundancy system,
service switches enable the maintenance or service on an UPS module. In the capacity system,
one needs to have a common system bypass switch to do the maintenance or service without
safety hazards.
Figure 42. Parallel configurations with UPS modules
Field upgrading can be used to extend existing capacity/redundancy systems with UPS
modules. The upgrading must be carried out by service personnel from the manufacturer or
from an agent authorised by the manufacturer.
UPS 8 – 15 kVA, 230V 50/60 Hz output
User’s Guide
1022403
Revision D
42
Tie cabinets
The Tie Cabinets (TCs), provided by UPS manufacturer, has input connections up to three
parallel UPS modules. It is also possible to use two redundant UPS modules and one bypass
connection. This bypass option can be used for service or test purposes.
Note!
It is not allowed to feed the load simultaneously from mains (bypass) and
inverter(s) of the UPS unit(s). While turning the switch, where the bypass is
connected, ON/OFF, UPS should be on static bypass mode or shut down.
Note!
The maximum load supported by the system is limited to 15 kVA if there are two
UPSs and bypass connected to TC (See wiring diagrams below).
Terminals of the TC have two-wire connection (L1 and N) and ground terminals. The upper ground
terminal is for a load cable and the lower ground terminal is for UPSs. The wiring shall be done
according to the wiring diagrams. The terminals and cable routing is shown in Figure 44.
Figure 43. Dimensions of the Tie Cabinet
UPS 8 – 15 kVA, 230V 50/60 Hz output
User’s Guide
1022403
Revision D
43
Figure 44 Cable routing of Tie Cabinet
Figure 45. Tie Cabinet’s wiring diagram with three UPSs.