Description
The PPU-3 (Paralleling and Protection Unit) is an advanced multi-function generator control, synchronization, and protection controller manufactured by DEIF.
Key Features & Overview
-
Product Family: DEIF Multi-line 2
-
Primary Application: Used extensively in marine and industrial power management systems for diesel generator sets.
-
Core Functions:
-
Automatic and manual generator synchronization
-
Comprehensive engine and generator protection
-
Power regulation modes (including load sharing, fixed power, and fixed frequency)
-
Integrated PLC logic capability and engine CANbus communication
-
-
Configurations: Available in variants with or without an integrated local display screen, and built with backup operational modes to ensure uninterrupted engine supervision if the main processor fails.
PPU-3
Product Overview
PPU-3 is the Parallel & Protection Unit manufactured by DEIF (Denmark, 丹控). It is a microprocessor-based genset controller, widely used for marine & industrial power management systems.
It integrates three-phase measurement, generator protection, automatic synchronization, load sharing and programmable logic (M-Logic). It can operate as standalone unit or coordinate with upper PLC/PM systems, supporting single generator independent operation and multi-generator parallel grid operation.
Optional engine interface board can realize engine start/stop sequence control and backup protection function.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | PPU-3 |
| Module Type | Generator Parallel & Protection Controller |
| Manufacturer | DEIF A/S |
| Power Supply | 24 VDC |
| Measurement Input | 3-phase voltage, current, frequency measurement |
| Core Protection Functions | Over/Under Voltage, Over/Under Frequency, Reverse Power, Overcurrent, Phase unbalance, Overload |
| Control Functions | Auto synchronisation, isochronous/droop mode, active/reactive load sharing, fixed power / fixed PF regulation |
| Communication Ports | CAN bus, RS232, RS485; options: Modbus, Profibus DP |
| Built-in Logic | M-Logic (micro PLC for custom interlock logic) |
| Display | Removable backlit LCD panel (can be remote-mounted) |
| Terminals | Digital DI/DO, multi-function analog I/O |
| Engineering Tool | USW-3 configuration software |
| Mounting | DIN rail cabinet mounting |
| Operating Temperature | -20 ℃ ~ +70 ℃ |
| Ambient Humidity | 5%–95% non-condensing |
| Protection Class | IP20 (inside control cabinet) |
| Certification | IEC, major marine classification society certifications |
| Spare Part Status | Production discontinued; surplus new & refurbished units available |
Key Features
- All-in-one design: combines synchronizer, protection relay and load sharing controller
- Supports analog load sharing and CAN bus digital load sharing for multiple gensets
- Flexible voltage/reactive power control modes, compatible with most generator AVR regulators
- Removable display panel, convenient for cabinet door remote operation
- Built-in comprehensive self-diagnosis, records fault events for troubleshooting
- Optional engine interface card provides independent backup protection path
- Supports remote monitoring via Modbus to DCS/SCADA systems
- Highly adaptable for marine vessel power systems and land-based CHP/genset stations
- Different hardware option variants cannot be directly interchanged without reconfiguration
