Power outage redundancy configuration
Yokogawa AMM42 and generator set (B) are the main generators. The generator set (C) is a redundant generator (Figure 2).
When the main power supply is lost or degraded and the generator set (A) malfunctions during operation, the following events will occur:
1. The automatic transfer switch sends a signal to the HMI panel to start the generator set (A) and generator set (B) through the generator operator panel.
2. The HMI panel monitors the operation of the main generator set and parallels them with the system operation.
3. The switch panel is assigned a designated emergency power supply.
4. The generator set (A) has an active shutdown warning.
5. The HMI panel starts the generator set (C), removes the generator set (A) from the configuration, and performs cooling/shutdown operations.
6. The HMI panel parallels the generator set (C) with the generator set (B), monitoring the system load and alarm conditions of the online generator.
When the main power supply is available, the automatic transfer switch disconnects the generator set and connects it to the main power grid.
8. The HMI panel sends signals to the operating panels of the generator set (B) and generator set (C) to perform cooling/shutdown operations.
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