Brief Product Description

The DEIF MULTI-LINE GPU/2/GS is a high-performance microprocessor-based generator protection unit designed for comprehensive monitoring and safeguarding of diesel and gas generator sets. As a core member of the DEIF Multi-Line 2 series, this compact panel-mounted relay integrates full electrical protection, precise true-RMS measurement, event logging and serial communication functions. It continuously monitors generator voltage, current, frequency and power parameters, executing configurable alarm and trip logic to prevent generator damage from electrical faults. Built with robust industrial-grade hardware, it adapts to marine, offshore and heavy industrial environments. As a reliable legacy spare device, it is available as fully tested surplus and refurbished units for maintenance, replacement and system retrofitting of existing generator control and protection panels worldwide.

Core Product Functions

• Comprehensive generator protection including reverse power, over/under voltage, over/under frequency, overcurrent and phase unbalance protection
• High-precision true-RMS three-phase measurement for voltage, current, active/reactive power and electrical energy
• Fully configurable alarm and trip thresholds with adjustable time delay to avoid false tripping
• Built-in event recording system to store fault logs, operation records and trip history for post-fault analysis
• Support Modbus RTU communication for seamless connection with SCADA systems and remote monitoring platforms
• Equipped with RS232 service interface for parameter configuration, firmware upgrade and on-site debugging via PC software
• Multiple programmable digital inputs and relay outputs for external alarm indication and breaker trip control
• Password protection function ensures safe and authorized parameter modification and system operation

• Durable panel-mounted structure with strong anti-interference performance for harsh industrial and marine working conditions

Application Scenarios

• Industrial diesel and gas generator set protection and monitoring systems
• Marine vessels, offshore platforms and coastal engineering power generation equipment
• Power plant auxiliary generator and emergency backup power systems
• Data centers, hospitals and industrial critical backup power supply facilities
• Micro-grid, distributed power station and independent power generation system protection
• Spare replacement protection unit for maintenance, troubleshooting and upgrading of legacy DEIF generator control systems

FAQ (Frequently Asked Questions)

• Q: Why does the GPU/2/GS trigger frequent false trips during generator operation?
  A: Check CT/PT wiring polarity and accuracy, verify protection threshold and delay parameter settings, inspect for grid voltage fluctuation and electromagnetic interference on-site.
• Q: Failure to connect the device with configuration software?
  A: Confirm normal device power supply, check RS232 cable integrity, match baud rate and communication parameters, and use the official supporting DEIF configuration tool.
• Q: Does this unit support generator synchronization and parallel operation control?
  A: The GPU/2/GS is dedicated to generator protection and monitoring only. It does not support synchronization or load sharing functions, which require DEIF specialized synchronizer modules.
• Q: Is the DEIF MULTI-LINE GPU/2/GS suitable for hazardous area installation?
  A: This standard model applies to conventional safe industrial and marine environments. Professional explosion-proof models are required for hazardous explosive zones.
• Q: Is this device available for new generator project construction?
  A: This is a legacy end-of-life generator protection unit. Only tested surplus and refurbished products are supplied for existing system maintenance and retrofitting projects.