ABB RXIIK 4 1MRK001643-AA

Description

Detailed Parameter Table

ABB RXIIK 4 1MRK001643-AA

Product Introduction

The RXIIK 4 1MRK001643-AA is a high-performance medium-voltage surge arrester from ABB, engineered to protect 24 kV electrical distribution systems against transient overvoltages caused by lightning strikes, switching operations, and system faults. As a critical protective component, it diverts excessive surge currents to ground while clamping overvoltages to safe levels, safeguarding expensive equipment such as transformers, circuit breakers, and cables from insulation damage.

Featuring a robust EPDM polymer housing, RXIIK 4 1MRK001643-AA is designed for long-term reliability in harsh outdoor environments, including coastal areas, industrial zones, and utility substations. Its compact design and wide temperature tolerance (-40°C to +80°C) make it suitable for both indoor switchgear and outdoor pole-mounted installations. Whether deployed as a standalone protector or in conjunction with RXPPK 2H arresters for layered protection, this arrester ensures uninterrupted power supply and reduces maintenance costs in critical 24 kV networks.

Core Advantages and Technical Highlights

EPDM polymer housing
The arrester’s EPDM housing offers superior resistance to UV radiation, ozone, and chemical pollutants compared to traditional materials. In a coastal utility substation, this durability prevents degradation from salt spray, extending service life to over 25 years—significantly longer than porcelain alternatives in such environments. The housing also provides excellent hydrophobicity, minimizing tracking and arcing risks even in humid or polluted conditions.

High surge handling capability
With a maximum discharge current of 40 kA and nominal current of 20 kA, RXIIK 4 1MRK001643-AA reliably handles severe lightning strikes and switching surges. In a rural 24 kV distribution network, it can safely divert the energy from a direct lightning strike on an overhead line, clamping the overvoltage to ≤65 kV—well below the 95 kV basic insulation level (BIL) of typical 24 kV transformers, thus preventing insulation breakdown.

Wide temperature range
Operating from -40°C to +80°C, the arrester adapts to extreme climate conditions. In a desert substation, it withstands daytime temperatures exceeding 50°C without performance degradation, while in a northern utility network, it remains effective during winter cold snaps down to -40°C, ensuring year-round protection.

Typical Application Scenarios

In a 24 kV industrial distribution system for a chemical plant:

• RXIIK 4 1MRK001643-AAis installed at the incoming supply point to protect the main transformer and switchgear from external lightning surges.
• Additional units are mounted on feeder circuits supplying critical loads such as reactor cooling pumps and process control systems.
• Paired with RXPPK 2Harresters on 10 kV secondary circuits, it forms a coordinated protection scheme that limits overvoltages at every system level.

The arrester’s chemical resistance ensures reliability in the plant’s corrosive atmosphere, while its fast response time (≤25 ns) suppresses surges from capacitor bank switching, preventing false trips in sensitive process equipment.

In a utility’s 24 kV overhead distribution network:

• Pole-mounted RXIIK 4 1MRK001643-AAunits protect transformer banks serving residential and commercial areas.
• Their IP66 rating withstands rain, snow, and dust, eliminating the need for protective enclosures.
• The lightweight design (≈3 kg) simplifies installation on wooden or concrete poles, reducing labor costs compared to heavier arresters.

During a thunderstorm, the arrester diverts surge currents to ground, preventing transformer failures and minimizing customer outages.

ABB RXIIK 4 1MRK001643-AA

Related Model Recommendations

• RXIIK 2 1MRK001642-AA: 12 kV variant of RXIIK 4 1MRK001643-AAfor lower-voltage distribution systems.
• RXPPK 2H 1MRK001615-AA: 24 kV arrester with lower residual voltage, ideal for cascaded protection with RXIIK 4 1MRK001643-AA.
• OTL 24D: ABB 24 kV switchgear compatible with RXIIK 4 1MRK001643-AAfor integrated protection.
• 1MRK000219-BA: Surge arrester monitoring unit that tracks leakage current and surge counts for RXIIK 4 1MRK001643-AA.
• T2S 24: 24 kV transformer optimized for use with RXIIK 4 1MRK001643-AAto maximize protection margins.
• CR24: 24 kV current transformer that pairs with RXIIK 4 1MRK001643-AAin protection and metering circuits.

Installation, Commissioning and Maintenance Instructions

Installation preparation
Ensure the 24 kV system is de-energized and grounded before installing RXIIK 4 1MRK001643-AA. Mount the arrester vertically using M12 bolts (torque to 30 Nm) on a flat, rigid surface (e.g., switchgear busbar support or pole bracket). Connect the high-voltage terminal to the phase conductor using a 24 kV-rated connector (≥630 A). Connect the ground terminal to a low-impedance ground grid (≤5 Ω) using 95 mm² copper cable to ensure effective current dissipation. Maintain a minimum clearance of 400 mm from other live components to prevent flashover.

Maintenance suggestions
Inspect RXIIK 4 1MRK001643-AA annually for physical damage (e.g., cracks in the housing), loose connections, or signs of tracking. Clean the housing with a soft cloth and deionized water if contaminated with dirt or pollutants. Measure leakage current every 3 years using a specialized tester—values exceeding 1 mA at 1.05×Uc indicate degradation and require replacement. Record surge counter readings (if equipped) to track the number of significant events. Replace the arrester immediately if the housing is damaged, after a surge exceeding 40 kA, or if leakage current exceeds limits. Use only ABB-approved replacements to maintain protection levels.

Service and Guarantee Commitment

The RXIIK 4 1MRK001643-AA is backed by a 10-year warranty, covering defects in materials and workmanship under normal operating conditions. ABB’s power systems engineers provide on-site support for installation verification and surge protection coordination studies, ensuring optimal integration with 24 kV network components.

Customers receive access to detailed application guides, including voltage selection criteria and mounting diagrams specific to RXIIK 4 1MRK001643-AA. ABB offers training programs on arrester maintenance and testing, helping utilities and industrial users maximize equipment lifespan. With global distribution centers, replacement units are available for rapid delivery, minimizing unprotected downtime in critical power systems.