Parallel System Overview
| UIB | Unit input disconnect device |
| SSIB | Static switch input disconnect device |
| IMB | Internal maintenance disconnect device |
| UOB | Unit output disconnect device |
| SIB | System isolation disconnect device |
| BB | Battery disconnect device |
| MBB | Maintenance bypass disconnect device |
NOTE: In
Schneider Electric literature, 'disconnect device' is used as a generic
term covering circuit breakers or switches as their position may vary
depending on configuration. Details about the individual configuration
are found in the electrical diagram and/or by reading the symbol on
the front of each disconnect device.
Simplified 1+1 Parallel System
Galaxy VS can support 2 UPSs in a simplified 1+1 parallel system for redundancy with shared UIB and SSIB.
Simplified 1+1 Parallel System – Single Mains |
Simplified 1+1 Parallel System – Dual Mains |
Parallel System with Individual UIB and SSIB
Galaxy VS can support up to 4 UPSs in parallel for capacity and up to 3+1 UPSs in parallel for redundancy with individual UIB and SSIB.
NOTE: IMB
can only be used in a simplified 1+1 parallel system. In any other
parallel system, an external MBB must be provided and IMB* must be
padlocked in the open position.
Parallel System – Single Mains |
Parallel System – Dual Mains |
Parallel System with Shared UIB and SSIB
Galaxy VS can support up to 4 UPSs in parallel for capacity and up to 3+1 UPSs in parallel for redundancy with shared UIB and SSIB.
NOTE: IMB
can only be used in a simplified 1+1 parallel system. In any other
parallel system, an external MBB must be provided and IMB* must be
padlocked in the open position.
Parallel System – Single Mains |
Parallel System – Dual Mains |