Description
Technical Specifications
| Feature | Specification |
|---|---|
| Model | PRU-4 / PRU |
| Device Type | Power Judge Unit (Ballast Water Management System) |
| Origin | South Korea |
| Weight | Approx. 4.8 kg |
| Dimensions | 280 mm x 210 mm x 115 mm |
| Input Voltage | 24V DC / 110V-220V AC (System Dependent) |
| Communication | CAN Bus / RS485 |
| Protection Rating | IP44 / IP54 |
| Operating Temperature | -5°C to +55°C |
| Material | Industrial Grade Synthetic / Aluminum Alloy |
The TECHCROSS PRU-4 acts as a critical monitoring and control interface within the Electro-Cleen™ Ballast Water Management System (BWMS). It is engineered to accurately judge and regulate the power distribution to the electrolysis cells, ensuring that the disinfectant concentration remains within regulatory limits while providing real-time feedback to the main control console regarding voltage stability and electrode health.
Product Q&A
Q: What is the primary role of the PRU-4 in a Ballast Water Management System? A: The Power Judge Unit (PRU) is responsible for monitoring the electrical output to the chambers. It “judges” whether the power levels are sufficient for effective sterilization and communicates this status to the ECU to maintain compliance with IMO and USCG standards.
Q: How does the PRU-4 handle power fluctuations on a vessel? A: It features built-in surge protection and stabilization circuits designed to filter out the typical noise and voltage drops found in marine electrical grids, ensuring consistent performance for the electrolysis process.
Q: Can the PRU-4 unit be replaced without a full system overhaul? A: Yes, it is designed as a modular component. As long as the firmware version is compatible with the existing ECU, the PRU-4 can be swapped during routine maintenance to restore power monitoring functionality.

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