Honeywell 10310/3/1CC Earth Leakage Detector 20.008.211

Description

The Honeywell 10310/3/1CC (Part Number 20.008.211) is a compact DIN-rail mounted Earth Leakage Detector designed for real-time monitoring and detection of ground faults in industrial electrical control systems. Engineered under the Haussener Electronic product line for Honeywell safety and control environments, this specialized monitoring relay continuously tracks system insulation resistance and detects leakage current threshold violations (CL > 25 mA) to prevent unexpected operational downtime, equipment damage, and electrical hazards.

Featuring an operating voltage rating of +24V DC, the device includes front-panel diagnostic indicators (LEDs for Fault and Mode status) alongside integrated toggle switches for frequency configuration (1/4 Hz and 1 Hz) and manual Test/Reset operations. Standard screw terminal block connections ensure reliable field wiring for power inputs, earth ground reference points, and dry contact alarm relay outputs.

Features

• Specialized earth leakage detection for industrial control circuits with a trip threshold rating of CL > 25 mA
• Front-panel status LEDs providing visual indication for Fault (Red) and Mode (Green) operational status
• Integrated toggle switch for selectable detection frequency modes (1/4 Hz and 1 Hz)
• Built-in front-panel toggle switch for manual Test and Reset operations
• Integrated volt-free contact output for remote alarm signalling and supervisory system integration
• Screw terminal block interface supporting clear terminal identification (+24V, 0V, Earth connections, and relay contacts)
• Standard DIN-rail mountable compact enclosure for installation inside industrial control panels

Applications

• Ground fault monitoring in 24V DC power distribution circuits
• Protection of industrial control systems, PLC cabinets, and DCS I/O field power lines
• Continuous insulation monitoring in ungrounded or high-resistance grounded control networks
• Integration into safety systems where early leakage detection prevents nuisance trips and equipment damage

Technical Specifications

Connections / Interfaces

Installation Guidelines

1. Verify that the incoming power supply matches the rated +24V DC input specification before energizing the module.
2. Ensure mains power and field voltages are completely isolated prior to mounting or wiring the unit inside the control cabinet.
3. Snap the module securely onto a standard DIN rail within a clean, dry, and adequately ventilated enclosure.
4. Wire the +24V DC supply, earth ground reference connections (Earth1, Earth., Earth2), and dry contact alarm wiring according to system schematics.
5. Verify tight terminal screw connections to ensure low contact resistance and stable ground monitoring reference.

Configuration / Commissioning / Maintenance

1. Mode Selection: Set the front-panel toggle switch to the required frequency setting (1/4 Hz or 1 Hz) based on system response requirements.
2. Functional Testing: Toggle the Test switch to manually simulate a fault condition, confirming that the Fault LED illuminates and the output contact changes state.
3. System Reset: Toggle the Reset switch following a test or cleared earth fault to restore the detector to normal monitoring mode (indicated by the Mode LED status).
4. Periodic Inspection: Visually inspect wire terminations and verify diagnostic status LEDs as part of routine preventive maintenance.