The DEIF PPU-3 is an advanced generator paralleling and protection controller designed for marine and industrial power management systems. As the third generation of DEIF’s Parallel and Protection Unit series, this IEC 61892-compliant device enables automatic synchronization of multiple gensets with <2% voltage deviation and <±5° phase angle matching precision. The PPU-3 integrates 32-bit ARM Cortex-M7 processing with dual-redundant CAN bus architecture, achieving 10ms cycle times for critical offshore platform black start sequences.
Featuring configurable IEC 60255 protection curves, the DEIF PPU-3 provides comprehensive electrical system monitoring including under/over frequency (40-70Hz range), reverse power detection (0.5-100% sensitivity), and harmonic distortion analysis up to 50th order. Its modular design supports hot-swappable I/O cards for easy expansion in cruise ship power plants. The unit’s 7″ capacitive touchscreen displays real-time vector diagrams and load sharing parameters essential for hospital backup power systems.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | PPU-3 |
| Manufacturer | DEIF |
| Product Type | Generator Paralleling & Protection Controller |
| Input Voltage | 24-240VAC/DC (85-264VAC auto-ranging) |
| Frequency Range | 15-70Hz (±0.02Hz accuracy) |
| Protection Functions | 27/50/51/59/81U/81O (ANSI codes) |
| Communication | 2x CANopen, 1x Modbus TCP, 1x RS-485 |
| Relay Outputs | 6 CO (8A @ 250VAC) |
| Operating Temp | -25°C to +70°C |
| Enclosure Rating | IP40 (front panel)/IP20 (terminals) |
| Dimensions | 144x144x160mm (DIN 96×96 cutout) |
Key Features and Advantages:
Advanced load management: The PPU-3’s dynamic load sharing algorithm balances 3-phase loads across generators with ±2% accuracy, crucial for data center power continuity. Its “soft loading” function prevents mechanical stress during turbine generator synchronization.
Multi-layer protection: Combines 12 programmable protection curves with 3-stage alarm escalation. The embedded transient recorder captures 128 cycles of waveform data (sampled at 4kHz) for post-fault analysis in pharmaceutical cleanroom power systems.
Intuitive operation: Drag-and-drop function blocks in DEIF Power Plant Configurator software simplify custom logic creation for hybrid power systems. The front-panel LED ring provides 360° status visibility in low-light engine rooms.
Application Areas:
The DEIF PPU-3 excels in:
- Marine: Paralleling 440V/60Hz generators on LNG carriers
- Oil & Gas: Protecting 11kV offshore wind farm substations
- Healthcare: Managing 400V/50Hz backup generators for MRI power
- Construction: Mobile diesel generator synchronization
In polar research vessels, the PPU-3 maintains power quality with <3% THD during dynamic positioning operations. Mining operations utilize its vibration-resistant design (IEC 60068-2-6 compliant) for generator synchronization in mobile processing plants. The integrated power factor correction control (0.5 lag to 0.8 lead) optimizes fuel efficiency in remote telecom base stations.
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Installation and Maintenance:
Installation preparation: Verify generator CT ratios (100:1 to 5000:1 configurable) before connecting to PPU-3’s 1A/5A inputs. Maintain 150mm clearance from high-voltage cables in switchboard installations.
Maintenance recommendations: Update firmware biannually using DEIF Update Manager. Clean air vents quarterly in dusty environments using dry compressed air (<2 bar). Perform full calibration every 24 months using DEIF DK-300 test kit to maintain 0.5% current measurement accuracy.
Product Assurance:
HONG KONG SAUL ELECTRICAL LIMITED provides 12-month extended warranty for PPU-3 units, including free configuration support for IEC 61892-2018 compliance. Each controller undergoes 96-hour burn-in testing with simulated 690V/60Hz grid disturbances. Our 24/7 technical support covers remote diagnostics for offshore power plants and priority replacement for mission-critical installations. Full set of type approval certificates (including DNV GL and ABS) accompanies every shipment.
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