Parallel System Overview
| UIB | Unit input breaker |
| SSIB | Static switch input breaker |
| IMB | Internal maintenance breaker |
| UOB | Unit output breaker |
| SIB | System isolation breaker |
| BB | Battery breaker in UPS for internal batteries and in external battery solution (if present) |
| MBB | External maintenance bypass breaker |
Simplified 1+1 Parallel Systems
Galaxy VS can support 2 UPSs in a simplified 1+1 parallel system for redundancy with shared unit input breaker UIB and static switch input breaker SSIB.
Simplified 1+1 Parallel System – Single Mains |
Simplified 1+1 Parallel System – Dual Mains |
Parallel Systems with Individual Unit Input Breaker UIB and Static Switch Input Breaker 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 unit input breaker UIB and static switch input breaker SSIB.
NOTE: The internal maintenance
breaker IMB can only be used in a simplified 1+1 parallel system.
In any other parallel system, an external maintenance bypass breaker
MBB must be provided and the internal maintenance breaker IMB* must
be padlocked in the open position.
Parallel System – Single Mains |
Parallel System – Dual Mains |
Parallel Systems with Shared Unit Input Breaker UIB and Static Switch Input Breaker 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 unit input breaker UIB and static switch input breaker SSIB.
NOTE: The internal maintenance
breaker IMB can only be used in a simplified 1+1 parallel system.
In any other parallel system, an external maintenance bypass breaker
MBB must be provided and the internal maintenance breaker IMB* must
be padlocked in the open position.
Parallel System – Single Mains |
Parallel System – Dual Mains |