6. Operation Principles
6.2.8 Maintenance Bypass Mode
A manual bypass switch is available to ensure continuity of supply to the critical load when the UPS becomes unavailable (e.g. during a
maintenance procedure). Before entering the Maintenance Bypass Mode, make sure the bypass power source is available.
Single
Input
Main
Input Breaker
Bypass
Dual
Inputs
Main
Q4
Maintenance Breaker
STS
Rectifier
Q1
Battery Breaker
Q4
Maintenance Breaker
Q2
Bypass Breaker
Rectifier
Q1
Input Breaker
Battery Breaker
Maintenance Bypass Mode Diagrams
Inverter
Inverter
Relay
STS
Inverter
Inverter
Relay
52
Load
Q3
Output Breaker
Load
Q3
Output Breaker