GCU-100 Gensets Control and Protection Module


Generator Automatic Control and Protection Module

The GCU-100 is a programmable Automatic Control and Protection Module suitable for all makes and types of generators. The GCU-100 is equipped with graphical warning signals and three separate LED displays for real time 3 phase voltage, AC current, generator frequency, battery volt, and running hours. The GCU-100 allows customization of setting values for specific generator protections and settings and also allows remote communication and monitoring.


  • Micro-Processor auto control and protection
  • Three sets of high illuminating LED display suitable for indoor and outdoor use
  • Full function modularized design for easy installation
  • All functions setting can be done directly on GCU-100 no need for PC connection *1
  • All settings are recorded into the internal (EEPROM) and protected from erasure even without battery
  • Optional USB/RS485/Ethernet remote communication functions
  • Free APP for monitor and operate your ATS and genset directly from your smart phone
  • Easy to understand graphical warning signals
  • Din rail terminal for easy installation
  • IP65 waterproof front panel

USB/RS485/Ethernet remote communication functions (Optional)

USB/RS485/Ethernet remote communication functions (Optional)


  • Power Input
  • Voltage 9 to 35 Vdc (12V/24V)
  • Sensing Input
  • Voltage 15 to 510 Vac
    Frequency 50/60 Hz
  • Power Dissipation
  • Max. 5 watts
  • MPUSignal Input
  • Voltage +/-2 to +/-70 Vac
    Frequency 100 Hz Min. 10K Hz Max.
  • CT Specification
  • Burden Above 2.5 VA
  • CT Secondary Ratio
  • 5A

Protection and Alarm Status Indicators

  • Engine Start Failure
  • Emergency Stop Activated
  • High Engine Temperature
  • Low Engine Oil Pressure
  • Engine Over and Under Speed
  • Abnormal AC Volt
  • Generator Over Load
  • Low Fuel Level
  • Charge Motor Failure
  • Abnormal DC Volt
  • Scheduled Maintenance Warning
  • Free Programmable Warning

Panel Display

  • Fixed or Circulating Full Phase Voltage, Current and Frequency
  • Engine Operation Hours
  • DC Voltage (Battery)
  • Delay Countdown Display


  • Operating Temperature
  • -20 to +60 °C
  • Relative Humidity
  • Max. 90%
  • Max. Vibration
  • 5 to 25 Hz +/-1.6 mm
    25 to 100 Hz a=4g

Physical Specifications

  • Panel Cut-Out
  • 137.0 x 137.0 +/-0.5 mm
  • Dimension
  • 147.8 (L) x 147.8 (W) x 62.3 (H) mm
  • Weight
  • 604 g +/-2%



Rotating Image

Optional Accessories