Honeywell 10310/2/1 Earth Leakage Detector (ELD) – Reliable Ground Fault Protection

Product Overview

The Honeywell 10310/2/1 is a precision-engineered Earth Leakage Detector (ELD) designed to monitor and protect DC electrical systems against earth faults. This module is essential for maintaining system integrity in industrial environments where ungrounded DC supplies are common. With its ability to monitor 24 V DC, 48 V DC, 60 V DC, and 110 V DC systems, the 10310/2/1 offers versatile protection across a range of applications.

This ELD operates by connecting the earth level to a reference voltage (-12 V DC) derived from the system's 0 V connection. It continuously or intermittently checks for leakage currents that could indicate insulation breakdown or accidental grounding. The module features a manual self-test function and an earth connection monitor, ensuring that the unit itself is always operational. Its compact design and robust construction make it a reliable choice for critical infrastructure.

Key Features

• Multi-voltage compatibility: Monitors 24 V DC, 48 V DC, 60 V DC, and 110 V DC systems.
• Selectable connection modes: Continuous (DC), 1 Hz, or 1/4 Hz interruption for flexible fault detection.
• Manual self-test: Switch 2 in 'TEST' position verifies the unit's functionality.
• Earth connection monitor: Alerts to loss of earth connection.
• Relay output: Provides a clean contact for alarm or trip circuits (max 115 V DC, 2 A).
• CE and UL approvals: Meets international safety standards.
• Key coding: Module code holes A5, A11; rack code large pins A5, A11 for easy identification.

Technical Specifications

| Parameter | Value |

|-----------|-------|

| Manufacturer | Honeywell |

| Product No. | 10310/2/1 |

| Product Type | Earth Leakage Detector (ELD) |

| Power Supply Voltage | 24 V DC (max. 30 V DC) |

| Supply Current | max. 60 mA |

| Rst24 Input Voltage | 18...70 V DC |

| Rst110 Input Voltage | 40...130 V DC |

| Rst24 Input Current | 1.1 mA at 24 V DC |

| Rst110 Input Current | 2.5 mA at 110 V DC |

| Earth Voltage (no fault) | -12 V DC |

| Earth Fault Threshold | -30...+125 V DC |

| Max. Earth Current | 5.5 mA (±1 mA) |

| Output Contact Max. Voltage | 115 V DC |

| Output Contact Max. Current | 2 A |

| Relay Contacts – Initial Contact Resistance | 30 mOhm |

| Relay Contacts – Max. Current | 5 A |

| Relay Contacts – Max. Switched Voltage | 250 V DC / 250 V AC |

| Relay Contacts – Max. Switched Load | 100 W / 1000 VA |

| Expected Life – Electrical | 100,000 switch operations |

| Expected Life – Mechanical | 200,000,000 switch operations |

| Module Code | Holes A5, A11 |

| Rack Code | Large pins A5, A11 |

Comparison with Similar Products

| Feature | Honeywell 10310/2/1 | Typical ELD (24 V only) |

|---------|---------------------|------------------------|

| Voltage Monitoring | 24/48/60/110 V DC | 24 V DC only |

| Connection Modes | Continuous, 1 Hz, 1/4 Hz | Continuous only |

| Self-Test | Manual | None |

| Approvals | CE, UL | Varies |

Applications

The Honeywell 10310/2/1 Earth Leakage Detector is ideal for use in:

• Industrial control systems: Protects PLCs, drives, and other sensitive electronics from earth faults.
• Power distribution panels: Monitors DC bus insulation in substations and switchgear.
• Telecommunications: Ensures integrity of -48 V DC power systems.
• Marine and offshore: Safeguards DC systems on ships and platforms.
• Renewable energy: Monitors DC circuits in solar and wind installations.

Why Choose UbestNine?

At UbestNine, we specialize in providing high-quality new and refurbished industrial automation parts. When you choose us, you benefit from:

• Quality Assurance: Every part is tested and certified to meet OEM specifications.
• Competitive Pricing: Significant savings compared to buying new.
• Fast Shipping: Same-day dispatch for in-stock items.
• Expert Support: Our knowledgeable team helps you find the right part and answers technical questions.
• Warranty: All products come with a warranty for peace of mind.

FAQ

Q: What is the difference between the 1 Hz and 1/4 Hz modes?

A: The 1 Hz mode interrupts the earth connection at 1 Hz, while the 1/4 Hz mode does so at 0.25 Hz. The 1/4 Hz mode is used for locating earth faults with a current clamp.

Q: Can this ELD be used on 110 V DC systems?

A: Yes, the 10310/2/1 supports 110 V DC systems as well as 24, 48, and 60 V DC.

Q: How do I perform a self-test?

A: Set switch 2 to the 'TEST' position. The module will simulate an earth fault and verify the output relay operation.

Q: What does the green 'MODE' LED indicate?

A: The LED flashes at the selected connection frequency (1 Hz or 1/4 Hz) when the switch is in those positions. In DC mode, it remains steady.

Q: Does UbestNine provide technical support?

A: Yes, our team is available to assist with product selection and troubleshooting.

Ordering Information

To order the Honeywell 10310/2/1 Earth Leakage Detector, contact UbestNine today. We offer fast delivery and competitive pricing. Ensure your systems are protected with this reliable ELD from a trusted brand.