The GE MX350 (often identified by part number 1009-0135) is an advanced microprocessor-based controller designed for Automatic Transfer Switch (ATS) systems. It serves as the intelligent brain of power transfer applications, monitoring voltage and frequency across two independent power sources (typically utility and generator) and commanding the transfer switch to ensure seamless power availability for mission-critical loads.
Product Specifications
| Feature | Details |
| Model Number | MX350 |
| Part Number | 1009-0135 (Series A2) |
| Device Type | Automatic Transfer Controller |
| Input Monitoring | Three-phase voltage and frequency sensing |
| Connectivity | Modbus RTU / RS-485 |
| Display | LCD Interface for monitoring and setup |
| Housing | Panel-mount control module |
| Country of Origin | USA |
Application Fields
The MX350 is deployed in critical power architectures where uptime is non-negotiable:
- Healthcare Facilities: Ensuring life-safety systems and critical medical equipment remain powered during utility failures.
- Data Centers: Managing the transition between main power and backup UPS/generator systems.
- Industrial Manufacturing: Protecting production lines from voltage dips and total power loss.
- Commercial Buildings: Automating emergency lighting and fire safety system power transfers.
Product Usage Instructions
- Mounting: The controller is designed for flush mounting on the front door of an ATS enclosure. Ensure the gasket is seated correctly to maintain the enclosure’s NEMA/IP rating.
- Wiring: Connect sensing leads (Utility Source A and Generator Source B) to the controller’s voltage terminals. Use a protected harness for communication and control relays.
- Configuration: Utilize the front-panel menu to set system parameters, such as voltage/frequency thresholds, timer settings (e.g., “Engine Start Delay,” “Transfer Delay,” “Retransfer Delay”), and fail-safe logic.
- Testing: Before commissioning, use the “Test” mode to simulate a power failure. Observe the unit’s ability to initiate a generator start command, sense voltage, and signal the transfer switch to move.
- Diagnostics: The LCD provides real-time status updates. In the event of a fault, the screen will display specific error codes corresponding to source failures or transfer malfunctions.
Frequently Asked Questions
Q: What is the primary purpose of the “A2” series designation?
A: The “A2” indicates a specific hardware revision. These revisions often include improvements in processing speed, software compatibility, or expanded menu options for more complex power applications. Always verify the revision if replacing an existing unit.
Q: Can the MX350 be integrated into a SCADA system?
A: Yes, via its RS-485 communication port, the MX350 can transmit real-time status data (source availability, switch position, fault logs) to a master SCADA system using the Modbus protocol.
Q: What happens if the generator fails to start?
A: The controller is programmed to monitor the “Source B” status. If the generator does not reach operational voltage/frequency within a configured time limit, the controller can be set to generate an “Engine Start Failure” alarm and stay on the utility source (if available).
Q: Is this controller field-serviceable?
A: The internal logic and processor are sealed. If the controller fails, it must be replaced as a complete unit. Always back up your configuration settings using the provided software tool before removing a unit for maintenance.
