Description
Manufacturer: ABB
Part Number: 1MRB150071M0001
Model Alias: REB500-BU03
Product Type: Basic Bay Unit (BU) for REB500 Busbar Protection System, Relion series
Product Overview
The 1MRB150071M0001 (REB500-BU03) is a bay-level peripheral acquisition unit for ABB REB500 distributed busbar protection system. It is installed in each switchgear bay to locally sample CT/PT analog signals and binary status signals from circuit breakers, disconnectors and isolators. Digitized data is transmitted via high-speed fiber optic communication to the central busbar protection unit for sub-cycle bus differential calculation and fault judgment. This distributed architecture reduces long-distance CT secondary wiring risks and improves bus protection reliability for high-voltage substations.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Family | Relion REB500 Busbar Protection |
| Analog Inputs | CT / PT galvanic isolated inputs |
| Binary I/O | Circuit breaker, disconnector binary status acquisition and control output |
| Communication Interface | Multimode fiber optic, high-speed redundant bus |
| Data Latency | Sub-cycle sampling & transmission for fast busbar fault tripping |
| Power Supply | 80–250 V DC / 80–250 V AC |
| Mounting | 19-inch rack mount, panel chassis assembly |
| Operating Temperature | -20 °C ~ +60 °C |
| Storage Temperature | -40 °C ~ +85 °C |
| Certification | IEC 61850, CE, UL, KEMA type tested |
| Country of Origin | Sweden |
Key Features
- Distributed bay unit design, digitizes CT measurements locally to avoid CT open-circuit hazards from long copper wiring.
- High-speed fiber communication between bay units and central protection unit, ultra-low latency for bus differential protection.
- Supports breaker failure protection, disconnector position logic and bay interlocking functions.
- Comprehensive built-in self-monitoring for hardware, power supply, optical link and input channel diagnostics.
- Compatible with REB500 central unit, scalable for single bus, double bus and busbar sectionalized substation configurations.
- Supports IEC 61850 for substation SCADA, event logging and disturbance fault recording.
Application Scenarios
- HV / EHV substation busbar differential protection
- Power grid primary substation switchgear bays
- Combined-cycle power plant switchyard bus protection
- Heavy industrial power plant high voltage distribution substations
Installation & Maintenance Notes
- Terminate CT/PT secondary wiring strictly following polarity requirements; wrong polarity leads to bus protection mal-operation.
- Clean fiber optic connectors before installation, avoid dust or scratches that cause high optical attenuation.
- Verify DC auxiliary supply voltage and grounding before energization.
- Perform fiber link health check and bay unit synchronization test during commissioning.
- Download disturbance records and event logs for fault post-analysis after busbar events.
- Confirm firmware version compatibility with REB500 central unit before spare replacement.
FAQ
Q: What system does 1MRB150071M0001 belong to? A: It is the REB500-BU03 bay unit for ABB REB500 distributed busbar protection.
Q: What communication medium is used between BU and central unit? A: Multimode fiber optics for high-speed low-latency differential protection data exchange.
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