Lightning surge counter 3EX5 0 series

surge currentanalogwireless

Overview
Surge arrester monitoring devices from Siemens Energy provide targeted condition assessment for surge arresters used in electrical power networks. Solutions span from simple impulse counters to Arrester Condition Monitors (ACM) and Sensarresters™ systems providing remote access and analytics for predictive maintenance.

Why monitor surge arresters?

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

Product families and devices
Siemens Energy monitoring devices cover a range of monitoring needs:

• Surge counters — 3EX5 030: impulse counter installed in the arrester ground connection to register surge responses. 3EX5 050: surge counter with integrated leakage current meter. Versions 3EX5 030-1 and 3EX5 050-1 can include a passive auxiliary contact for remote counting.
• Counter for remote monitoring — 3EX5 060 (sensor): clamped to the arrester ground wire; counts surge responses and continuously measures leakage current. 3EX5 062 (display): remote visualization of surge counts and leakage current up to 200 m and provides a local connection for oscilloscope measurement.
• Arrester Condition Monitors (ACM) — Basic (3EX5 080-0): measures total leakage current and surge impulses, performs 3rd harmonic analysis with network harmonic compensation, applies temperature correction and indicates condition via traffic-light LEDs. Advanced (3EX5 080-1): adds a wireless USB module for direct PC communication, detailed visualization, parameter configuration and software updates.
• Sensarresters™ — Smart connected monitoring with web and mobile access, data analytics integration for predictive maintenance and wireless communication for remote diagnostics.

Key features and benefits

• Comprehensive monitoring: from impulse counting to advanced condition analysis and energy absorption logging
• Long-term trend analysis: ACM devices log daily leakage current for multi-year trend evaluation
• Wireless and remote access: reduces site visits and simplifies data retrieval
• Integration: designed for installation on existing arresters without arrester modification
• Safety support: early fault indication assists prevention of catastrophic failures

Additional notes
Devices should be selected to match network voltage and operational conditions; verify specific device-to-arrester compatibility for each application. Basic ACM units can be upgraded to advanced versions via wireless modules without modifying the arrester.

Technical specifications

• 3EX5 030: impulse counter, integrated into arrester ground, registers surge events.
• 3EX5 050: impulse counter with leakage current meter; 3EX5 030-1 and 3EX5 050-1 optionally include a passive auxiliary contact for remote metering.
• 3EX5 060 (sensor): clamped to arrester ground wire; continuous leakage current measurement and surge counting.
• 3EX5 062 (display): remote visualization of sensor data (surge counts and leakage current) up to 200 m; local leakage measurement connection for oscilloscope.
• 3EX5 080-0 (ACM Basic): measures total leakage current and surge impulses; 3rd harmonic analysis with network compensation; temperature correction; traffic-light LED condition indicator.
• 3EX5 080-1 (ACM Advanced): adds wireless USB module for direct PC communication, detailed data visualization, parameter configuration and software updates (ACM Service Tool compatibility).
• Sensarresters™ features: real-time remote status via web/mobile, data analytics integration for predictive maintenance, wireless communication for remote diagnostics.
• Logging and trend capabilities: daily leakage current logging for long-term trend analysis and condition evaluation.
• Compatibility: designed for integration with existing arresters; confirm device-to-arrester compatibility per application.