Alpha Technologies AMPS80 HP - Manual (Page 78)

Doc. #: 026-069-B0 Rev F 76
6.5 Synchronization with a Maintenance Bypass Switch (MBS)
6.5.1 Internal Maintenance Bypass Switch
If an internal MBS is present, implement the following sequence before switching the unit from bypass mode
to inverter mode.
Switching from Bypass Mode to Inverter (On-line)
1. Switch on the Inverter AC Input breaker.
2. Wait for the inverters to synchronize to the line—all status LEDs on the inverters will turn green.
3. Switch on the Inverter AC Output breaker.
4. Smoothly rotate the maintenance bypass switch in a clockwise rotation from BYPASS to INVERTER .
6.5.2 External Maintenance Bypass Switch
Before switching an external MBS from UTILITY mode to UPS mode:
1. Switch on the AMPS80 Inverter AC Input breaker. Wait for the inverters to synchronize to the line, and for
all status LEDs to turn green.
2. Switch on the AMPS80 Inverter AC Output breaker.
3. Follow the steps in the external MBS user manual to switch the external MBS bypass switch to UPS .