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

Product Overview

When industrial earth faults threaten system uptime, the Honeywell 10310/2/1 Earth Leakage Detector (ELD) provides reliable monitoring for 24 V DC systems. This digital output module combines a manually operated self-test with an earth connection monitor, ensuring operators can quickly verify system integrity. With switch 2 in the 'TEST' position, the ELD actively checks earth connections, reducing the risk of undetected faults.

Technical Specifications Breakdown

The 10310/2/1 operates on a 24 V DC power supply (max. 30 V DC) with a supply current of max. 60 mA. It supports Rst24 input voltage from 18 to 70 V DC and Rst110 input voltage from 40 to 130 V DC. The earth fault threshold ranges from -30 to +125 V DC, with a max. earth current of 5.5 mA (± 1 mA) or 25.0 mA (± 5 mA). Output contact handles up to 115 V DC and 2 A, while relay contacts manage max. 5 A with a max. switched voltage of 250 V DC / 250 V AC and max. switched load of 100 W / 1000 VA. The module features an expected electrical life of 100,000 switch operations and mechanical life of 200,000,000 switch operations.

Industry Applications

In industrial environments where 24 V DC, 48 V DC, or 60 V DC systems are common, the 10310/2/1 ensures continuous earth leakage monitoring. It also supports 110 V DC systems, making it versatile for various control panels. The ELD connects earth level with -12 V DC, referenced to the 0 V connection of the DC supply. This connection can be continuous (switch 1 in 'DC' position) or interrupting at 1 Hz or 0.25 Hz, accommodating solenoids or relays that might stay energized by negative earth voltage. The '1/4 Hz' position aids in locating earth faults using a current clamp like the DCM300E.

Installation & Setup Guidance

Install the 10310/2/1 module in a suitable rack with key coding holes A5, A11 and large pins A5, A11. Ensure the power supply voltage stays within 24 V DC (max. 30 V DC). Connect the Rst24 input (18 to 70 V DC) or Rst110 input (40 to 130 V DC) as needed. Set switch 1 to 'DC' for normal operation, or select '1 Hz' or '1/4 Hz' for specific fault location tasks. Use the self-test feature regularly to verify earth connection integrity.

Maintenance & Reliability

Regularly inspect the 10310/2/1 for proper operation by performing the manual self-test. The module's robust relay contacts offer an electrical life of 100,000 operations and mechanical life of 200,000,000 operations, minimizing downtime. The green 'MODE' LED flashes at the selected connection frequency, providing visual status. Periodic verification of earth fault thresholds and earth current levels helps maintain system reliability.