Overview
The ABB RET615 is a compact, high-performance relay designed for transformer protection and control. It belongs to ABB’s Relion® 615 series and supports two-winding, step-up, and generator-transformer units. The relay fully leverages IEC 61850 interoperability, ensuring seamless communication between substation devices.
Key Features
- Comprehensive Protection: Transformer differential (87T) with harmonic restraint, restricted ground-fault, short circuit, overcurrent, overvoltage, and optional arc flash detection.
- Advanced Monitoring: Measures HV and LV currents, symmetrical components, active/reactive power, energy, and supports up to eight RTD inputs.
- Disturbance Recorder: Records 12 analog and 64 binary signals, storing data in non-volatile memory for post-event analysis.
- Communication and Control: Full IEC 61850 Edition 2 support including GOOSE and sampled values; supports Modbus® and DNP3 protocols. Optional redundant Ethernet enhances reliability.
Technical Specifications
| Parameter | Value |
|---|---|
| Width | Frame 177 mm, Case 164 mm |
| Height | Frame 177 mm, Case 160 mm |
| Depth | 201 mm |
| Weight | Complete unit 4.1 kg, Plug-in 2.1 kg |
| Phase-Current Inputs | 6 |
| Neutral-Current Input | 1 |
| Phase-Voltage Inputs | 3 |
| Residual Voltage Input | 1 |
| Optional RTD Inputs | 8 for temperature/pressure |
| Auxiliary Voltage | 24–250 V DC, 100–240 V AC |
| Max Interruption Time | 50 ms without reset |
| Operating Temperature | -25°C to +55°C, short-term -40°C to +85°C |
| Humidity | <93% non-condensing |
| Altitude | Up to 2000 m |
| EMC Compliance | IEC 60255-26, EN 55011 |
| Environmental Protection | IP54 front, IP20 rear |
Applications
- Protection of two-winding transformers in utility and industrial systems
- Step-up transformers in generator-transformer blocks
- Supervision and control of circuit breakers, disconnectors, and grounding switches
- Monitoring transformer thermal and operational conditions to ensure reliable operation
ABB RET615 delivers precise, reliable protection while integrating advanced monitoring, disturbance recording, and robust communications for modern power systems.
For detailed technical guidance, refer to the ABB RET615 User Manual.
Details
| Weight | 4.1 kg |
|---|---|
| Dimensions | 201 × 177 × 177 mm |
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