Power monitoring system LIBRA CCI UPS

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Overview
Expandable integrated monitoring and control system for power generation plants. Designed to comply with CEI 0-16 Annexes O and T and ARERA Resolutions 540/2021/R/EEL and 385/2025/R/EEL requiring a Central Plant Controller (CCI) with Active Power Limitation under external DSO command (PF2) for PV and wind plants ≥100 kW connected to the MV grid.

Measurement and standards
Integrated energy analyzer with measurement accuracy class ≤ 0.2 as required by CEI 0-16:2025-04, Annex O (normative), section O.13.2.1.

Main functions

• Power quality analysis compliant with EN 50160 and EN 61000-4-30
• Environmental parameter monitoring
• Integrated UPS to ensure uninterrupted local power for critical functions

Communication and connectivity

• Ethernet with three dedicated ports
• Integrated 2G/3G/4G modem (LTE Cat.1)
• Integrated GPS/GLONASS module with external antennas
• External antennas supplied for modem and GPS
• Network bridge between RJ45 Ethernet and RS485 for Modbus communication with Electrex devices on the RS485 subnetwork

Additional features

• Battery-backed perpetual astronomical clock/calendar
• Non-volatile memory for historical data
• Individual harmonic measurement up to the 51st order
• Detection and logging of voltage sags, swells and interruptions
• Integrated web server for real-time measurements and historical data display
• Five opto-isolated digital inputs for status monitoring and pulse counting
• Three relay digital outputs for status or pulse operation (other versions available)
• Optional expansion modules providing additional I/O and up to eight inputs for Electrex environmental sensors
• Remote firmware update capability
• Graphic FSTN display and two calibration LEDs

Connections and installation
Current transformer, power supply and voltage connections use polarized connectors for fast, error-free plug-and-play installation.

Package contents

• One 5‑pole female connector for voltage and power supply wiring
• One 6‑pole female connector for current transformer connections with 2 m cable
• External 4G antenna for integrated modem with 5 m cable
• Magnetic GPS/GLONASS antenna with 5 m RG174 cable

Technical specifications

• Model: LIBRA CCI UPS
• Manufacturer: Electrex
• Measurement accuracy class: ≤ 0.2
• Supply voltage: 230 Vac
• Dimensions: 236 × 316 × 190 mm
• Ethernet: 3 dedicated ports
• Cellular modem: 2G/3G/4G, LTE Cat.1
• Positioning: GPS/GLONASS module with external antenna
• Harmonic measurement: up to the 51st order
• Digital inputs: 5 opto-isolated (status monitoring and pulse counting)
• Digital outputs: 3 relay outputs (status/pulse)
• Expansion: optional I/O modules and up to 8 inputs for environmental sensors
• Clock/calendar: battery-backed perpetual astronomical clock/calendar
• Display: Graphic FSTN
• Memory: non-volatile
• UPS: integrated
• Firmware: remote upgradeable
• Connectors: polarized for CT, supply and voltage wiring (plug-and-play)
• Accessories included: 5‑pole connector, 6‑pole connector with 2 m cable, 4G antenna with 5 m cable, magnetic GPS/GLONASS antenna with 5 m RG174 cable