Parallel System Overview
The UPS can support up to 4 UPSs in parallel for capacity and up to 3+1 UPSs in parallel for redundancy.
NOTE: In a parallel system,
an external maintenance bypass switch/breaker (Ext. MBB) must be provided
and the internal maintenance switch IMB and MBB (marked with an *
in the diagrams) must be padlocked in the open position.
UPS with One Internal Switch
| UIB | Unit input breaker |
| SSIB | Static switch input breaker |
| UOB | Unit output breaker |
| SIB | System isolation breaker |
| BB | Battery breaker |
| IMB | Internal maintenance switch |
| Ext. MBB | External maintenance bypass switch/breaker |
Parallel System – Single Mains (One Internal |
Parallel System – Dual Mains (One Internal |
UPS with Four Internal Switches
| UIB | Unit input switch |
| SSIB | Static switch input switch |
| UOB | Unit output switch |
| SIB | System isolation breaker |
| BIB | Bypass input breaker |
| MIB | Mains input breaker |
| BB | Battery breaker |
| MBB | Maintenance bypass switch |
| Ext. MBB | External maintenance bypass switch/breaker |
The UPS can support up to 4 UPSs in parallel for capacity and up to 3+1 UPSs in parallel for redundancy.
Parallel System – Single Mains (Four Internal Switches)
Parallel System – Dual Mains (Four Internal Switches)
