GE MX150

Product Overview

The GE MX150 is a microprocessor-based controller designed for GE Zenith ZTG/ZTGD/ZTGSE/ZTGDSE series automatic transfer switches (ATS), serving as the core control unit for emergency and standby power systems. It replaces the legacy MX100 controller and integrates a microprocessor board, LCD/keypad interface, and isolated I/O for seamless interaction with dual power sources (S1: normal, S2: emergency). The controller monitors voltage, frequency, and phase synchronization of both sources, automatically transferring loads to the backup source when the normal source fails, and retransferring once the normal source stabilizes within preset parameters.
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Description

Technical Specifications

Parameter Details
Model Number MX150 (GE Zenith Controls, PN: 150039225, 50P-1160RPL)
Manufacturer GE Zenith Controls (GE Industrial Solutions)
Product Type ATS Microprocessor Controller
Control Voltage 120V AC/DC, 240V AC (selectable); 50/60Hz
Power Consumption 25 VA (max)
Input Voltage Range 85%–110% of nominal (adjustable)
Frequency Range 47–63Hz (adjustable)
Phase Monitoring 3-phase (VAB, VBC, VCA)
Synchronization Check Phase angle difference ≤7 electrical degrees
Time Delays S1 Stable (T): 0–10 min; S2 Stable (W): 0–10 min; Load Presignal (T3/W3): 0–10 min; ATS Open Time (DT/DW): 0–10 min; S2 Stop Delay (U): 0–10 min
I/O Interfaces Engine start relay (P); Pre-signal (T3/W3/UMD); Transfer Inhibit (Q3/Q7); Remote Test (Q2); ZNET (Modbus/LonWorks)
Display LCD (16×2 characters) with keypad; LED indicators (source availability, switch position, alarms)
Memory Nonvolatile (configuration retained without battery backup)
Isolation Processor/digital circuitry isolated from line voltage; inputs opto-isolated
Operating Temperature -20°C to +70°C
Storage Temperature -40°C to +85°C
Dimensions 254mm × 178mm × 51mm (10″ × 7″ × 2″)
Weight 0.8 kg (1.76 lbs)
Certifications UL 1008, CSA C22.2 No. 178, IEC 60947-4-1
Communication Modbus RTU, LonWorks, ZNET (optional)

Function Features

  • Automatic Transfer Logic: Monitors S1/S2 voltage/frequency/phase, initiates transfer to S2 on S1 failure, and retransfer to S1 when S1 stabilizes.
  • Adjustable Setpoints: Voltage (85%–100% nominal), frequency (47–63Hz), and time delays (0–10 min) configurable via LCD/keypad without power section disconnection.
  • Synchronization Check: Ensures phase alignment (≤7°) before transfer to prevent inrush currents and equipment damage.
  • Built-in Diagnostics: Event logging (100+ events), LED indicators, and LCD status display for real-time troubleshooting.
  • Nonvolatile Memory: Configuration and event data retained without battery backup for standard operation.
  • Opto-Isolated Inputs: High electrical immunity to transients and noise in industrial environments.
  • Remote Monitoring: Modbus/LonWorks/ZNET support for SCADA integration and remote control.
  • Timed Exerciser: 7-day programmable (5–60 min duration) for testing backup generator operation.
  • Pre-Signal & Load Disconnect: Optional outputs for load shedding and generator pre-start sequencing.
  • Transfer Inhibit: Optional input to block transfers during maintenance or critical operations.
  • Wide Voltage Compatibility: 120V/240V AC/DC control voltage for global applications.

Application Scenarios

  • Commercial Buildings: Hospitals, data centers, and airports; ensures continuous power for life support, IT equipment, and lighting systems.
  • Industrial Plants: Manufacturing facilities and refineries; prevents production downtime by transferring loads to backup generators during grid outages.
  • Critical Infrastructure: Water treatment plants, wastewater facilities, and telecommunications hubs; maintains operation of pumps, valves, and communication equipment.
  • Healthcare Facilities: Clinics and research labs; supports uninterrupted operation of MRI/CT scanners and patient monitoring systems.
  • Data Centers: Server rooms and cloud facilities; integrates with UPS systems for seamless transfer to backup generators, avoiding data loss.
  • Retail & Hospitality: Malls and hotels; preserves lighting, HVAC, and POS systems during power failures.
  • Military & Government: Command centers and military bases; meets MIL-STD-810G for shock/vibration and temperature extremes.
  • Renewable Energy: Solar/wind farms; transfers loads between grid and renewable sources based on availability and stability.

Compatibility and Integration

  • ATS Compatibility: GE Zenith ZTG (standard transition), ZTGD (delayed transition), ZTGSE/ZTGDSE (service entrance) series, 40–3000A, 2/3/4 poles.
  • Generator Integration: Works with diesel/natural gas generators; engine start relay (P) and S2 stop delay (U) for seamless generator control.
  • Network Protocols: Modbus RTU (RS-485), LonWorks, ZNET for integration with SCADA/DCS systems.
  • Accessories: Pre-signal (T3/W3/UMD), transfer inhibit (Q3/Q7), remote test (Q2), and ZNET interface modules.
  • Standards Compliance: UL 1008 (ATS safety), CSA C22.2 No. 178, IEC 60947-4-1 (switchgear).
  • Field Replacement: Direct replacement for MX100 controllers; retains existing ATS infrastructure while upgrading control capabilities.
  • Documentation: MX150 Operation Manual (70R-2000C) provides wiring diagrams, configuration steps, and troubleshooting procedures.
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