ABB RXIDK 2H 1MRK000838-HA | New Surplus Relay Unit

Description

Product Overview

The ABB RXIDK 2H 1MRK000838-HA is a time overcurrent protection relay designed for electrical protection applications where controlled fault detection and circuit interruption are required. The relay monitors current levels within a power system and applies time-delayed protection characteristics to distinguish between normal operating conditions and abnormal overcurrent events. The ABB RXIDK 2H 1MRK000838-HA belongs to ABB’s protection relay product family and is used in industrial power distribution, switchgear assemblies, and electrical protection panels.

Within a protection scheme, the ABB RXIDK 2H 1MRK000838-HA receives current transformer signals, evaluates the measured current against configured trip characteristics, and provides relay outputs for protective switching operations. The unit is designed for applications requiring dependable overcurrent monitoring, including feeder protection, motor protection arrangements, and industrial electrical distribution systems. The RXIDK platform is associated with ABB protection and control equipment used in installations where selective fault clearing is required.

The ABB RXIDK 2H 1MRK000838-HA remains relevant for maintenance teams supporting existing ABB electrical protection systems that cannot be replaced without major engineering changes. Typical applications include medium-voltage switchgear maintenance, industrial power panels, and retrofit projects involving legacy relay replacement. Before installation, engineers should confirm CT ratio, trip circuit design, auxiliary supply requirements, relay coordination settings, and the existing protection study. To be completely transparent, protection relays are not simple plug-in replacements; incorrect time-current settings can affect coordination with upstream and downstream protective devices.

Product Introduction (Non-Templated)

A protection relay failure can leave electrical equipment exposed even when the distribution system appears normal during routine operation. The ABB RXIDK 2H 1MRK000838-HA restores the monitoring and trip function required for time-based overcurrent protection.

Designed for industrial electrical systems, this relay supports current monitoring, protective coordination, and legacy switchgear maintenance where existing ABB relay configurations must be preserved.

Key Technical Specifications

RXIDK 2H

Related Products

• ABB RXIDK 1H 1MRK000837-HA — Single-channel RXIDK relay variant. Used where fewer protection functions or reduced input requirements are needed.
• ABB RXIDF Series Relay — Related ABB overcurrent protection relay family. Used for feeder and distribution protection applications requiring similar current monitoring functions.
• ABB REF601 Series — Feeder protection relay platform with integrated measurement and control functions. Suitable for modern feeder protection upgrades.
• ABB REJ601 Series — Feeder protection relay family designed for medium-voltage distribution applications with overcurrent and earth-fault functions.
• ABB REM601 Series — Motor protection relay family from the same protection product range. Applied for motor feeder protection rather than general feeder protection.
• ABB RET601 Series — Transformer protection relay family used for transformer differential and protection applications.
• ABB REF615 Series — Advanced feeder protection and control relay platform with expanded communication and automation functions.
• ABB AC800M Controller Series — Industrial controller platform often integrated with ABB electrical protection and automation systems.

Frequently Asked Questions (FAQ)

1. Is the ABB RXIDK 2H 1MRK000838-HA compatible with my existing protection system?

Compatibility depends on the complete electrical protection design.

Verify:

• CT secondary rating
• Relay mounting arrangement
• Auxiliary voltage
• Trip circuit wiring
• Protection coordination settings

The relay must match the existing protection philosophy, not only the physical dimensions.

2. Can I hot-swap this?

No. The RXIDK 2H should not be replaced while the protection circuit is energized.

Recommended replacement steps:

1. Isolate the electrical circuit
2. Record existing relay settings
3. Disconnect CT and control wiring safely
4. Install replacement relay
5. Restore parameters
6. Perform functional testing

Protection equipment requires controlled commissioning after replacement.

3. Does the RXIDK 2H 1MRK000838-HA support firmware v3.1?

The RXIDK 2H is a protection relay rather than a programmable controller with user-managed firmware versions.

Verification should focus on:

• Relay hardware revision
• Protection setting compatibility
• Existing coordination study
• Panel wiring design

The relay must fit the complete protection scheme.

4. Will I lose my protection settings when replacing the RXIDK 2H?

Yes, unless the original settings are documented.

Before replacement:

• Record pickup current values
• Save time delay settings
• Document trip outputs
• Verify coordination parameters

After installation, all protection values should be checked before returning equipment to service.

5. How can I verify a New Surplus ABB RXIDK 2H 1MRK000838-HA is authentic?

Recommended checks:

• Confirm ABB nameplate marking
• Verify complete order code
• Inspect relay terminals
• Check enclosure condition
• Review inspection records

For protection devices, correct model identification and configuration matching are both important.

6. Can the RXIDK 2H support a legacy switchgear upgrade?

Yes, when the existing installation uses compatible ABB protection architecture.

Common applications:

• Relay replacement projects
• Industrial power distribution maintenance
• Switchgear refurbishment
• Spare protection inventory planning

The existing protection coordination study should be reviewed before installation.

7. What should engineers check before commissioning this relay?

Key verification steps:

1. Confirm CT polarity and wiring
2. Verify auxiliary supply
3. Load protection settings
4. Test pickup operation
5. Verify trip contacts
6. Perform secondary injection testing

These checks confirm that the relay provides the intended protection function after replacement.