Description
DEIF PPU-3
Technical Specifications
- Product type: Generator protection controller
- Measurement: Voltage, current, power, frequency
- Protection: Overcurrent, overvoltage, undervoltage, overfrequency, reverse power
- Communication: RS485 Modbus
- Output: Relay contacts
- Supply: DC24 V / AC110 to 230 V
- CT input: 1 A / 5 A
- PT input: 100 to 400 V
- Operating temperature: -25 °C to +70 °C
- Storage temperature: -40 °C to +85 °C
- Humidity: 5 % to 95 %, non-condensing
- Protection: IP20
- Installation: DIN rail / panel
- Display: LCD
Functional Features
- Full generator protection suite
- Voltage, current, power, frequency measurement
- LCD graphical display
- Mains paralleling control
- Load sharing
- Remote start/stop
- Event logging
- Modbus communication
- Front panel pushbuttons
- Wide-temperature industrial design
Application Scenarios
- Marine generator protection
- Power plant diesel genset control
- Factory captive power plant paralleling
- Data center backup generator
- OEM genset automation
Materials and Construction
- Housing: Flame-retardant engineering plastic
- Front panel: LCD and pushbuttons
- PCB: FR4 board
- Relays: Industrial relays
- Terminals: Screw terminals
- Seal: Panel gasket
Structural Features
- Panel/DIN rail square housing
- Front panel LCD, pushbuttons, LEDs
- Rear CT/PT, power, control, communication terminals
- Internal measurement, control, output
- Fanless cooling
- Removable terminals
Working Principle CT/PT signals are sampled to compute voltage, current, power, and frequency. The protection CPU compares measured values to settings; on violation it outputs relay trip contacts. The controller executes generator start, paralleling, and load sharing per pushbutton and communication commands. LCD displays live parameters. Events are logged.
Installation Requirements
- Panel or DIN rail mount
- Connect CT secondary wires
- Connect PT secondary wires
- Wire breaker control
- Power supply
- Grounding
- Temperature -25 °C to +70 °C
- Set generator parameters after power-up
- Set protection values
Precautions
- CT secondary must not open-circuit
- PT secondary must not short-circuit
- Set protection values per generator nameplate
- Periodically perform function tests
- Store spares in dry environment
- RS485 A/B polarity
