Current monitoring device ACM series

measurementUSBwireless

Overview Surge arrester monitoring detects early signs of arrester degradation to protect electrical equipment and maintain network availability. Siemens Energy offers a portfolio from simple surge counters to advanced Arrester Condition Monitors (ACM) and Sensarresters™ for real‑time remote diagnostics and data integration.

Why monitor surge arresters?

• Early detection of condition changes
• Prevention of unexpected outages
• Optimized maintenance scheduling and cost control
• Improved asset management and network reliability

Our surge arrester monitoring solutions

• Surge Counters (3EX5 030 / 3EX5 050): counting of surge responses; 3EX5 050 adds leakage current measurement and display. Some -1 variants provide a passive auxiliary contact for remote metering.
• Counter with remote monitoring (3EX5 060 / 3EX5 062): 3EX5 060 sensor integrates into the arrester ground connection to count surges and continuously measure leakage current; 3EX5 062 is a remote display (up to 200 m) visualizing surge counts and leakage and enabling local leakage measurement connection.
• Arrester Condition Monitors (ACM: 3EX5 080-0 / 3EX5 080-1): basic ACM (3EX5 080-0) measures total leakage current and surge impulses, performs 3rd harmonic analysis with network compensation, applies temperature correction and indicates condition via traffic‑light LEDs. Advanced ACM (3EX5 080-1) supports a wireless USB module for PC communication, extended visualization and parameter configuration via ACM Service Tool.
• Sensarresters™ — smart connected monitoring: real‑time remote access (web/mobile), analytics integration for predictive maintenance and wireless data transfer for remote diagnostics.

Key features and benefits

• Comprehensive monitoring: impulse counting to advanced condition analysis and energy absorption logging.
• Long‑term trend analysis: daily leakage current logging for multi‑year trend evaluation.
• Wireless and remote access: reduces on‑site inspections and improves data availability.
• Compatibility: sensors install on arrester ground connections without modifying the arrester.
• Improved safety and reliability: early fault indication supports uninterrupted power supply.

Technical specifications

• Models referenced: 3EX5 030, 3EX5 050, 3EX5 060 (sensor), 3EX5 062 (display), 3EX5 080-0 (ACM basic), 3EX5 080-1 (ACM advanced), Sensarresters™.
• Measured parameters: surge impulse counts, total leakage current, leakage current trend logging (daily), surge current impulses, 3rd harmonic analysis, temperature measurement and correction.
• Indicators & outputs: traffic‑light LED condition indicators; passive auxiliary contact on selected -1 versions for remote metering.
• Remote visualization: 3EX5 062 supports remote display up to 200 m from the sensor; advanced ACM supports wireless USB communication to PC.
• Data & communication: wireless connectivity options for advanced devices; Sensarresters™ enable real‑time access and analytics integration.
• Installation: sensors integrate into arrester ground wire; displays mount remotely; compatibility to be verified per arrester application.
• Software/tools: ACM Service Tool for visualization, analysis and parameter configuration (used with advanced wireless module).