Product Overview

The 216GA62/N221 (identified by part number HESG112799R1) is a specialized high-speed auxiliary relay unit engineered for rapid fault isolation within ABB’s protection and control ecosystems. Designed to interface between low-level logic signals and heavy-duty switching gear, this module provides eight potential-free contacts capable of executing emergency shutdown and circuit breaker trip commands. It features a sophisticated dual-circuit architecture: a surge circuit for near-instantaneous contact closure and an economy circuit to drastically reduce holding power once the relay is latched, preventing thermal buildup during sustained activation.

Technical Specifications

• Manufacturer Model: 216GA62/N221

• ABB Order Code: HESG112799R1

• Contact Capacity: 8 Independent Potential-Free Tripping Contacts

• Operational Architecture: Integrated Surge and Economy (low-draw) circuits

• Logic Integration: Optional diode matrix support for direct external signal coupling

• Thermal Tolerance: -25°C to +55°C Operating Range

• Mechanical Dimensions: 180 mm x 60 mm x 30 mm

• Unit Weight: 0.5 kg

• Response Profile: High-speed actuation for critical fault isolation

• Application Compatibility: REG series protection racks and standalone industrial safety systems

Advanced Protection Features

The 216GA62/N221 is built for mission-critical reliability where milliseconds determine the safety of downstream equipment. The inclusion of the "Surge Circuit" ensures that the inductive lag typically found in standard relays is bypassed, allowing for immediate mechanical response. Following activation, the "Economy Circuit" limits the current flow, ensuring the module remains cool and energy-efficient even during extended trip states. For complex logic requirements, the module’s ability to host a tripping logic diode matrix allows engineers to create hardware-level "OR" gates for multi-source protection schemes without requiring additional external logic controllers.