Email: sales@slxytech.com
WhatsApp / Wechat：8617062388866
Phone：+86 17062388866Description
The DEIF PPU/2/GS is a high-integrity, multifunctional generator protection and control unit engineered for diesel and gas power generation systems operating in both islanded (standalone) and parallel (grid-connected or multi-unit) modes. Developed by DEIF A/S—a global leader in power management solutions—the DEIF PPU/2/GS integrates core functionalities such as automatic synchronization, load sharing (active and reactive), comprehensive electrical protection, and real-time monitoring into a single compact module. Designed for reliability in harsh industrial environments, it serves as the intelligent “brain” of emergency backup generators, prime power plants, and marine auxiliary systems.
As part of DEIF’s renowned PPU-2 series, the DEIF PPU/2/GS supports advanced control strategies including isochronous (ISOCH) and droop (DROOP) load sharing, enabling seamless coordination among multiple generators without external controllers. Its built-in protection suite covers overvoltage, undervoltage, overfrequency, underfrequency, reverse power, short-circuit, and more—ensuring compliance with IEC 60255 and IEEE C37 standards. With Modbus RTU communication via RS-485 and a user-friendly interface featuring a backlit LCD display, the DEIF PPU/2/GS simplifies commissioning, diagnostics, and remote integration into SCADA or BMS platforms, making it a preferred choice for critical power applications worldwide.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | PPU/2/GS (also labeled PPU-2-GS) |
| Manufacturer | DEIF A/S |
| Product Type | Generator Protection & Synchronization Controller |
| Control Functions | Automatic Synchronization, Load Sharing (kW/kVAr), Black Start, Island/Grid Mode Switching |
| Protection Features | Over/Under Voltage, Over/Under Frequency, Reverse Power, Short Circuit, Earth Fault, Phase Imbalance |
| Inputs | 12 Digital Inputs (24 VDC), 3 Analog Inputs (for external sensors), 3-Phase Voltage & Current Measurement (via CT/PT) |
| Outputs | 8 Relay Outputs (programmable for alarms, trips, or control signals) |
| Communication Interface | RS-485 (Modbus RTU), optional CANopen or Ethernet via add-on modules |
| Display | Backlit monochrome LCD with navigation keypad, real-time parameter view |
| Power Supply | 18–36 VDC (nominal 24 VDC), isolated input |
| Operating Temperature | -25°C to +70°C |
| Certifications | CE, IEC 60255, IEC 61000-6-2/6-4, UL 508 |
Main Features and Advantages
Advanced synchronization and load management: The DEIF PPU/2/GS automatically matches voltage, frequency, and phase angle before closing the circuit breaker, minimizing mechanical stress on the generator. In multi-unit setups, it dynamically balances real (kW) and reactive (kVAr) power using ISOCH or DROOP algorithms—eliminating the need for external load-sharing controllers and reducing system complexity.
Comprehensive protection with fast response: Equipped with 15+ configurable protection functions, the DEIF PPU/2/GS reacts within milliseconds to electrical faults, preventing equipment damage and ensuring personnel safety. All thresholds and time delays are user-adjustable via the front panel or configuration software, allowing fine-tuning for specific engine-generator characteristics.
Seamless integration and diagnostics: The built-in Modbus RTU interface enables direct connection to HMI, PLC, or SCADA systems for remote monitoring of parameters like voltage, current, frequency, power factor, and alarm status. The DEIF PPU/2/GS also logs event history and trip records, accelerating troubleshooting during maintenance.
Robust design for demanding environments: Housed in a rugged IP20-rated enclosure with conformal-coated PCBs, the DEIF PPU/2/GS withstands vibration, humidity, and electrical noise common in power plants, ships, and oil & gas facilities. Its wide DC supply range accommodates unstable battery-backed systems during cranking or black-start scenarios.
User-centric operation: The intuitive menu structure and clear LCD display allow operators to view real-time data, acknowledge alarms, or perform manual sync without specialized training. Configuration can be done locally or via DEIF’s free PPU Configurator software, reducing commissioning time by up to 50%.
Application Field
The DEIF PPU/2/GS is widely deployed in mission-critical power generation scenarios where reliability, precision, and autonomy are non-negotiable. In data centers and hospitals, it ensures uninterrupted backup power by managing automatic transfer to generator sets during grid failure, while maintaining strict voltage and frequency tolerances for sensitive IT and medical equipment. On offshore platforms and marine vessels, the DEIF PPU/2/GS coordinates multiple gensets to supply stable power despite fluctuating loads from drilling rigs, cranes, or propulsion systems—often in complete isolation from any external grid.
In renewable hybrid microgrids, the DEIF PPU/2/GS acts as the dispatchable backbone, synchronizing diesel/gas generators with solar or wind sources during low-renewable periods. It also plays a vital role in industrial cogeneration (CHP) plants, where precise load sharing maximizes fuel efficiency and extends engine life. Additionally, rental power companies rely on the DEIF PPU/2/GS for rapid deployment units due to its plug-and-play setup and universal compatibility with major engine brands (Caterpillar, Cummins, MTU, etc.). Whether used in a single standby unit or a 10-generator islanded grid, the DEIF PPU/2/GS delivers consistent performance across global infrastructure sectors.
Related Products
DEIF PPU-3/4G: Next-generation controller with color touchscreen, Ethernet/IP, and enhanced cybersecurity features
DEIF AGC-4: Advanced generator controller with full PLC functionality and IEC 61131-3 support
DEIF MPM-3: Multi-purpose meter for standalone power monitoring, often used alongside PPU/2/GS for billing-grade measurement
DEIF ASC-4: Automatic synchronizer module for retrofitting older gensets without integrated sync capability
DEIF DIT-30: Digital input/output expansion module to increase I/O capacity of PPU/2/GS systems
DEIF GCU-2: Simpler, cost-effective alternative for single-unit non-parallel applications
DEIF PPU Configurator Software: Free PC tool for offline programming, firmware updates, and data logging of PPU/2/GS
DEIF CT/PT Modules: Precision current and voltage transformers calibrated for optimal PPU/2/GS measurement accuracy
Installation and Maintenance
Pre-installation preparation: Before installing the DEIF PPU/2/GS, verify that the generator’s CT (current transformer) and PT (potential transformer) ratios match the configuration settings in the unit. Ensure the 24 VDC power supply is clean and capable of sustaining 300 mA during relay activation. Mount the DEIF PPU/2/GS on a vertical panel with adequate ventilation, away from high-EMI sources like VFDs or large contactors. Use shielded twisted-pair cables for RS-485 communication and analog inputs, with shields grounded at one end only to prevent ground loops.
Maintenance recommendations: The DEIF PPU/2/GS requires minimal routine maintenance but benefits from periodic inspection. Every 6–12 months, check terminal tightness, clean the display window, and review event logs for recurring warnings (e.g., sync failures or minor overloads). Perform a functional test of all protection trips annually using a relay test set to confirm calibration integrity. Firmware updates are rarely needed but should be applied if new engine compatibility or bug fixes are released—always back up the configuration before updating. Due to its solid-state design and lack of moving parts, the DEIF PPU/2/GS typically operates reliably for 10+ years with proper environmental conditions.
