Honeywell 10310/2/1 Earth Leakage Detector (ELD) for DC Systems

Product Overview

When earth faults threaten the reliability of your DC power systems, the Honeywell 10310/2/1 Earth Leakage Detector (ELD) provides a robust monitoring solution. Designed for 24 V DC systems, this digital output module includes a manually operated self-test and earth connection monitor (switch 2 in 'TEST' position). The ELD can monitor 24 V DC, 48 V DC, 60 V DC, or 110 V DC systems, making it versatile for various industrial applications. Manufactured in the USA, the 10310/2/1 ensures dependable performance in critical environments.

Technical Specifications Breakdown

The Honeywell 10310/2/1 operates with a power supply voltage of 24 V DC (max. 30 V DC) and draws a maximum supply current of 60 mA. It features two reset inputs: Rst24 (18...70 V DC) and Rst110 (40...130 V DC), with respective currents of 1.1 mA at 24 V DC and 2.5 mA at 110 V DC. The earth voltage is -12 V DC (no earth fault), and the earth fault threshold ranges from -30 to +125 V DC. Maximum earth current is 5.5 mA (± 1 mA) or 25.0 mA (± 5 mA). The output relay contacts handle a maximum voltage of 115 V DC and a maximum current of 2 A, with an initial contact resistance of 30 mOhm. The relay can switch up to 5 A, 250 V DC/250 V AC, and a maximum load of 100 W/1000 VA. Electrical life is 100,000 switch operations, while mechanical life reaches 200,000,000 operations.

Industry Applications

The 10310/2/1 is ideal for monitoring earth faults in industrial DC power systems, such as those found in process control, manufacturing, and utility substations. Its ability to monitor multiple DC voltages (24, 48, 60, 110 V DC) makes it suitable for diverse installations. The ELD's interrupting modes (1 Hz and 1/4 Hz) help locate earth faults using a current clamp, reducing downtime and improving system reliability.

Installation & Setup Guidance

Install the Honeywell 10310/2/1 in a suitable enclosure with proper ventilation. Connect the power supply (24 V DC, max. 30 V DC) and the earth connection as per the wiring diagram. Set switch 1 to 'DC' for continuous monitoring, '1 Hz' for interrupting at 1 Hz (to avoid energizing solenoids or relays), or '1/4 Hz' for earth fault location. Use switch 2 in 'TEST' position to perform manual self-test and verify earth connection. Ensure the Rst24 and Rst110 inputs are connected to the appropriate reset signals.

Maintenance & Reliability

Regularly test the ELD using the manual self-test function to ensure proper operation. Inspect connections and verify that the green 'MODE' LED indicates the selected frequency. With a mechanical life of 200 million operations, the relay provides long-term reliability. Periodically check the earth fault threshold and current levels to maintain accurate monitoring. Follow manufacturer guidelines for safe maintenance.

Compatibility & Integration

The 10310/2/1 integrates with 24 V DC, 48 V DC, 60 V DC, and 110 V DC systems. It features key coding with holes A5, A11 and rack code with large pins A5, A11. The module is CE and UL approved. Use with compatible current clamps like the DCM300E for earth fault location.

Selection Guide & Purchasing Advice

Before purchasing, verify that your system voltage matches the ELD's capabilities (24 V DC to 110 V DC). Confirm the required reset input voltage (Rst24: 18...70 V DC, Rst110: 40...130 V DC). The Honeywell 10310/2/1 is available from BluePLC Industrial, a trusted supplier of industrial automation parts. Contact us for current availability and lifecycle status.