Product Description

Overview

The HESG448614R1 is a high-performance numerical relay engineered to protect, monitor, and control power transformers in utility and industrial power systems. As a compact, all-in-one protection unit, it integrates multiple protection functions to ensure reliable transformer operation, reduce panel space, and simplify maintenance.

Technical Specifications

• Manufacturer: ABB

• Model: HESG448614R1

• Product Type: Numerical Transformer Protection and Control Relay

• Power Supply: 24 V DC standard

• Operating Temperature: -20°C to +55°C

• Ingress Protection: IP20

• Mounting Options: DIN rail or panel mount, horizontal or vertical orientation

• Dimensions (HxWxD): 135 × 67.5 × 28 mm

• Weight: ~0.16 kg (Net), ~1.5 kg (Shipping)

• Origin: Switzerland / Sweden

Key Features

• Differential Protection: Fast detection of internal winding faults.

• Overcurrent & Earth Fault Protection: Multi-stage protection for both phase and ground faults.

• Thermal Overload Monitoring: Protects insulation by tracking transformer thermal conditions.

• Voltage & Frequency Supervision: Ensures safe transformer operation within electrical limits.

• Breaker Failure Protection: Backup tripping if primary circuit breaker fails.

• Rapid Fault Isolation: Sub-cycle detection minimizes damage and system downtime.

• Flexible Grounding Support: Configurations for both high- and low-impedance neutral grounding.

• Advanced Logic Programming: Multi-layer timers, flip-flops, and site-specific protection schemes via PCM600.

• Communication: Supports IEC 61850 (Edition 2), IEC 60870-5-103, Modbus®, DNP3, Profibus for SCADA and substation integration.

Applications

• Utility Substations: Reliable transformer protection in medium and high-voltage networks.

• Industrial Power Systems: Safeguards autotransformers, generator-transformer blocks, and distribution transformers.

• Power Plants: Monitors transformer operation and prevents thermal or electrical overloads.

FAQ

Q: Can HESG448614R1 support multiple transformer types?
A: Yes, it protects two-winding, three-winding, and autotransformer configurations.

Q: Is it compatible with modern substation communication protocols?
A: Yes, fully supports IEC 61850, Modbus®, DNP3, IEC 60870-5-103, and Profibus.

Q: How does it handle transformer inrush currents?
A: Built-in inrush restraint logic ensures stable operation without false trips.