Product Core Brief
- Model: MX150
- Brand: GE (General Electric)
- Series: GE Automatic Transfer Switch (ATS) Controllers
- Core Function: Controller for GE ZTG-series automatic transfer switches, managing utility-to-generator source transfer and monitoring dual power supplies.
- Product Type: ATS Controller Module
- Key Specs: Dual-source voltage/frequency monitoring | Configurable transfer timers | Event log with time stamps | Supports exercise timer (CDT/CDP)
- Condition: New Original (New Surplus) / Factory Sealed
Product Introduction
When a GE ZTG automatic transfer switch loses its controller, the entire backup power chain goes blind. The is the front-panel controller that sits on GE ZTG-series ATS units, monitoring both utility (S1) and generator (S2) sources, executing transfer logic, and logging every event with time stamps. It handles undervoltage/underfrequency thresholds, phase imbalance detection, in-phase monitoring, generator start delays, and programmable exercise cycles — all the decisions that keep critical loads powered during a utility failure.
Why this matters: a failed MX150 means the ATS won’t auto-transfer. Your generator might start, but the switch never closes. For facilities still running GE ZTG transfer switches, keeping a verified spare controller on the shelf is the difference between a seamless source transfer and a manual bypass under pressure. This is a legacy part — no longer in active production — but still fielded across hospitals, data centers, and industrial plants.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model | |
| Product Type | ATS Controller |
| Compatible Switch | GE ZTG-series Automatic Transfer Switch |
| Monitored Sources | S1 (Utility) + S2 (Generator) |
| Monitoring Functions | Phase voltage, frequency, undervoltage, underfrequency, phase imbalance, in-phase sync |
| Transfer Timers | S2 start delay (0–10 s), S2 stable delay (0–5 min), S1 stable delay, open-to-S2 delay (1–10 min) |
| Exercise Functions | CDT single-event timer, CDP clock-based timer (daily to annual) |
| Load Control | Load disconnect auxiliary contact (0–5 min), elevator pre-signal (0–60 s) |
| Communication | NETWORK option (ON/OFF configurable) |
| Display | LCD with menu navigation and event log |
| Access | User access code protection |
| Mounting | Front-panel mount on ZTG ATS enclosure |
Note: Exact firmware revision and feature set may vary by manufacturing date. Confirm against your existing unit’s label before ordering.
Key Selling Points & Differentiators
- Correct fit for GE ZTG ATS. The MX150 is purpose-built for the ZTG series — not a generic relay or a replacement for MX60/MX250 controllers used on GTX/ZTS switches.
- Full transfer logic on board. Undervoltage, underfrequency, phase imbalance, in-phase monitoring, generator start/stable delays, and exercise scheduling — all configurable from the front panel.
- Event log with time stamps. When something goes wrong, you can pull the log and see exactly what happened and when. No guesswork.
- New surplus availability. These are discontinued. We stock verified, unused units — not pulled-from-service modules with unknown history.
- Not recommended for GE GTX (needs MX60/MX90) or ZTS (needs MX250) transfer switches. Wrong controller = no communication with the switch mechanism.
- 12-month warranty with pre-shipment visual inspection and power-up verification.
Quality Transparency SOP
- Label & revision audit. Verify “MX150” marking and serial/revision data on the rear label. Cross-check against known GE controller formats to rule out relabeled substitutes.
- Visual inspection. Check LCD screen for cracks, buttons for tactile response, and connector pins for corrosion or bending.
- Power-up test. Apply rated control voltage. Confirm LCD boots, menu navigation responds, and system clock holds.
- Configuration verification. Navigate CONFIG and SET menus to confirm all parameters are accessible and the event log is functional.
- ESD packaging. Sealed in anti-static bag, foam-padded box, shipped with a signed test report.
Technical Risk Avoidance
- ❗ Verify your ATS model before ordering. MX150 is for GE ZTG switches only. GTX uses MX60/MX90; ZTS uses MX250. Installing the wrong controller will not work.
- ❗ Record existing parameter settings before replacing. Undervoltage thresholds, transfer timers, and exercise schedules are stored in the controller. If you don’t document them first, you’ll be reprogramming from scratch — and guessing at values that were tuned for your facility.
- ❗ Check the control power supply (CPS) voltage. The MX150 runs off the ATS control power circuit. If the CPS is failing, a new controller won’t fix the root problem.
- ❗ After installation, run a no-load transfer test. Verify S1→S2 and S2→S1 transfers execute correctly before relying on the unit during an actual outage.
Buyer’s FAQ
Q: Will this work on my GE GTX or ZTS transfer switch? A: No. MX150 is for ZTG-series switches only. GTX requires MX60 or MX90; ZTS requires MX250.
Q: Is this new or refurbished? A: New original surplus — factory sealed, never installed. We do not sell pulled or refurbished units as “new.”
Q: Can I program this myself? A: Yes. All parameters are accessible through the front-panel menu. However, we strongly recommend documenting your existing settings before swapping controllers.
Q: Does it support Modbus or Ethernet communication? A: The MX150 has a NETWORK option that can be enabled/disabled in CONFIG. Specific protocol support depends on firmware revision — confirm against your existing unit or system documentation.
Q: What’s the lead time and warranty? A: In-stock units ship within 1–2 business days. 12-month warranty from ship date, covering manufacturing defects and DOA failures.
