ABB SPER1C1 Trip Circuit Supervision Relay

Product Overview

The SPER1C1 is a high-reliability supervision relay engineered for the continuous monitoring of critical trip circuits in high-voltage switchgear and industrial power installations. Part of the modular ABB COMBIFLEX system, this relay is designed to detect faults—such as auxiliary voltage failures, contact welding, or poor electrical connections—before they lead to a catastrophic failure during a protection event. By ensuring the integrity of the circuit-breaker's trip path, the SPER1C1 provides an essential layer of security for substations, power plants, and large-scale distribution networks. Its robust mechanical design and integrated LED diagnostics make it a standard choice for mission-critical protection schemes.

Technical Specifications

• Model Designation: SPER1C1

• Functional Category: Trip Circuit Supervision (TCS) Relay

• Supply Voltage Range: 40V to 265V DC (Wide-range universal input)

• System Integration: Fully compatible with ABB COMBIFLEX mounting

• Dimensions: 477 mm x 22.5 mm x 261 mm

• Net Weight: 0.875 kg

• Monitoring Capability: Continuous path supervision, fault detection, and early warning

• Visual Indicators: Front-panel LED for operational status and fault signaling

• Mounting Options: Rail-mounted or surface-mounted (Alternative: SPER 1B1 C4)

• Safety Feature: Preset operate time to prevent nuisance alarms during normal switching operations

Advanced Supervision Logic

The SPER1C1 operates on a "Fail-Safe" principle. It injects a small, supervised current through the trip circuit to verify continuity even when the circuit breaker is in the open or closed position. If the relay detects an interruption—whether caused by a broken wire, a blown fuse, or a faulty auxiliary contact—it immediately changes the state of its internal output relay to alert the SCADA or alarm system. This proactive monitoring eliminates "blind spots" in the protection chain, ensuring that when a protection relay commands a trip, the hardware is electrically capable of executing it.