Overview
The ABB RXSF1 RK271020-AH is an auxiliary signaling and control relay engineered for industrial automation, protection, and tripping applications. Part of ABB’s RXSF series, this relay combines reliability with compact dimensions, making it suitable for panel-mounted control systems. The unit features automatic reset capability and multi-contact configuration to handle complex signal routing and control logic in electrical substations and industrial control panels.
Key Features
- DC-powered coil with automatic reset function for fail-safe operation
- Multiple make and break contacts for flexible signal switching and control
- Compact design (75 × 52 × 36 mm) enabling space-efficient installation
- Red flag visual indicator for manual status verification
- Lightweight construction (250 g) for easy handling and mounting
- Plug-in socket compatibility for quick installation and replacement
Technical Specifications
- Relay Type: Auxiliary signaling and tripping relay
- Coil Voltage: DC 110–125V
- Contact Configuration: 2 make, 4 break contacts
- Rated Current: 20A at 24V DC
- Contact Rating: 5000 operations at 250V AC / 30A
- Reset Function: Automatic reset
- Dimensions: 75 × 52 × 36 mm (H × W × D)
- Weight: 250 g
- Mounting: Plug-in socket (matches standard ABB relay sockets)
- Enclosure Rating: Panel-mounted
- Certifications: Compliant with international safety standards
- Origin: Made in Sweden
Typical Applications
- Power distribution and substation protection systems
- Industrial control and automation panels
- Signaling and alarm circuits in electrical systems
- Tripping and fault indication circuits
- Remote monitoring and status indication
- General-purpose auxiliary switching in motor control centers
Compatibility & Replacements
The RXSF1 family (including the RK271020-AH variant) is interchangeable with standard ABB relay sockets and is commonly used as a replacement for discontinued signaling relays. When replacing legacy relay models, ensure coil voltage, contact configuration, and socket compatibility match your existing installation. This unit is part of ABB’s broader RXSF signaling relay series, which includes variants for AC and DC operation with different contact counts and voltage ratings. For system integrators and maintenance technicians, the plug-in design allows straightforward field replacement without panel rewiring.
