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The DEIF PPU-3 is a multi-function controller designed for power management applications, particularly for generator sets. PPU stands for Paralleling and Protection Unit, which perfectly describes its core functions. It’s a highly capable controller used in a wide range of applications, especially in marine and industrial settings.
Key Features and Functionality
The DEIF PPU-3 is built to be an all-in-one solution for controlling and protecting a generator. It combines multiple functions that would typically require separate components, making it a robust and cost-effective choice.
- Paralleling and Load Sharing: A key feature of the PPU-3 is its ability to synchronize a generator with other generators or with the mains supply. It supports automatic synchronization and ensures seamless load sharing between gensets to optimize fuel efficiency and power stability.
- Comprehensive Protection: The PPU-3 offers extensive protection for both the generator and the engine. This includes protection against overcurrent, over/under voltage, over/under frequency, reverse power, and short circuits. It also provides engine protection for conditions like low oil pressure and high temperature.
- Engine Control: When equipped with an optional engine interface card, the PPU-3 can serve as a full engine control unit. This gives it the ability to handle engine start/stop sequences, monitor critical engine parameters (via J1939 CAN bus), and provide backup supervision in case of a main processor failure.
- Versatile Communication: The unit is designed for easy integration into larger systems. It features multiple serial communication options like Modbus RTU over RS-485 and Modbus TCP/IP over Ethernet, allowing it to interface with PLCs, SCADA systems, and other power management systems. This enables remote monitoring, control, and data logging.
- User-Friendly Interface: The PPU-3 comes with a quality LCD screen that displays all measured values, statuses, and alarms. This makes it easy to operate and configure, whether you’re on a ship’s bridge or in an industrial control room.
Technical Specifications
| Parameter | Value |
| Supply Voltage | 12/24 VDC |
| AC Measuring Voltage | 100-690 Vac (line-to-line) |
| AC Measuring Current | -/1A or -/5A (via CT) |
| Relay Outputs | 5A, 250 VAC / 24 VDC (resistive) |
| Communication | Modbus RTU (RS-485), Modbus TCP/IP (Ethernet), J1939 CAN bus |
| Approvals | Marine-approved by major classification societies, UL/cUL listed |
Common Applications
The DEIF PPU-3’s robust design and comprehensive feature set make it a go-to choice for critical power applications where reliability is essential.
- Marine Vessels: This is a primary application for the PPU-3. It’s widely used for controlling and protecting marine gensets, ensuring stable power for propulsion and onboard systems. Its marine certifications and robust build are key advantages here.
- Industrial Power Plants: For small to medium-sized industrial plants that require multiple generators to operate in parallel, the PPU-3 is used to manage synchronization and load sharing.
- Standby/Emergency Power Systems: The PPU-3 can be configured for Automatic Mains Failure (AMF) applications, where it automatically starts a generator and transfers the load when the utility power fails.
