Overview of Parallel System
| MIB | Main input disconnect device |
| BIB | Bypass input disconnect device |
| UIB | Unit input disconnect device |
| SSIB | Static switch input disconnect device |
| UOB | Unit output disconnect device |
| Ext. UOB | External unit output disconnect device |
| MBB | Maintenance bypass disconnect device |
| Ext. MBB | External maintenance bypass disconnect device |
| SIB | System isolation disconnect device |
| BB | Battery 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.
NOTE: In parallel systems with an external maintenance bypass
disconnect device Ext. MBB, the internal maintenance bypass disconnect
devices MBB* must be padlocked in the open (OFF) position.
