ABB MT-91-ARCFPA – Arc Flash Protection Assembly
The ABB MT-91-ARCFPA is a high-speed arc flash protection relay designed to detect and mitigate arc flash hazards in electrical systems, safeguarding personnel and equipment in industries such as power distribution, manufacturing, and oil and gas. It provides rapid fault detection and isolation to minimize damage and downtime caused by arc flash events.
Technical Parameters
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Category
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Specification
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Input Voltage
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100–240 V AC/DC (±20%) or 24–48 V DC
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Detection Method
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Light Intensity (fiber-optic sensors) + Current Signature (overcurrent)
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Response Time
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<1 ms (arc light detection) + <10 ms (trip signal generation)
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Communication Interfaces
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– RS-485 Modbus RTU
– Ethernet TCP/IP (optional) – IEC 61850 (optional) |
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Relay Outputs
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4–6 programmable relays (250 V AC/DC, 5 A)
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Sensors
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Fiber-optic light sensors (up to 8 channels)
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Operating Temperature
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-40°C to +70°C
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Certifications
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IEC 60255, UL 508, CE, RoHS, IEEE C37.20.7 (arc resistance)
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Enclosure
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IP40 (standard), optional IP54 for harsh environments
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Functional Features
- Ultra-Fast Arc Flash Detection
- Combines light intensity (via fiber-optic sensors) and current signature analysis for reliable arc flash detection.
- Adjustable thresholds for light intensity and overcurrent to reduce nuisance tripping.
- Integration with Protection Systems
- Generates trip signals to circuit breakers or contactors within 10 ms to isolate faults.
- Compatible with ABB’s Relion® protection relays and Emax 2 air circuit breakers.
- Diagnostics & Event Logging
- Stores event records with timestamps, light/current waveforms, and trip history.
- Real-time monitoring via HMI or remote SCADA systems.
- Communication & Cybersecurity
- Modbus RTU/TCP or IEC 61850 for integration with automation systems.
- Role-based access control and encrypted communication (TLS/SSL).
- Flexible Configuration
- Configurable zones for selective tripping in complex electrical panels.
- Supports redundant sensor configurations for critical applications.
- Industrial Resilience
- Operates in high-EMI, high-vibration, and extreme-temperature environments.
- Fiber-optic sensors immune to electromagnetic interference.
Typical Applications
- Switchgear & MCC Panels: Arc flash protection in low-voltage (LV) and medium-voltage (MV) systems.
- Data Centers: Critical power distribution systems.
- Oil & Gas: Hazardous area electrical installations.
- Renewable Energy: Solar/wind farm substations.
Compliance & Standards
- Safety: IEC 60255-27 (arc flash protection), NFPA 70E (workplace safety).
- EMC: IEC 61000-6-2 (immunity), IEC 61000-6-4 (emissions).
- Environmental: RoHS, IP54 (optional).
Conclusion
The ABB MT-91-ARCFPA is a critical safety solution for mitigating arc flash risks in electrical installations. Its ultra-fast detection, multi-sensor integration, and industrial-grade design ensure personnel safety and equipment protection in high-risk environments. While specific details may vary, this module aligns with ABB’s commitment to advanced protection technologies and operational reliability.
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