ABB MT‑91‑ARCFPA Arc‑Flash Protection Control Panel

Technical Specifications Model: MT‑91‑ARCFPA Supply Voltage: 24 VDC ±10 % Display Unit: 5.7‑inch TFT color LCD display Communication Interfaces: RS‑232, RS‑485 Response Time: ≤1 s Insulation Withstand Voltage: ≥1000 VAC 1 min Insulation Resistance: ≥100 MΩ Mounting Method: Cabinet panel embedded‑mount Operating Temperature: 0 ℃ to +50 ℃ Storage Temperature: ‑20 ℃ to +70 ℃ Relative Humidity: ≤85 %, non‑condensing Protection Class: Front‑face IP54, rear‑side IP20 Certifications: CE

Functional Features Real‑time display for arc‑flash protection system running status, measuring value and fault‑alarm information. Local parameter configuration for arc‑flash protection threshold, tripping‑delay and logic‑setting parameters. Fault‑event record storage for arc‑fault occurrence time and fault‑location information. Multi‑language display interface supports field‑operation requirement of different regions. Front‑panel physical operation buttons complete local manual reset and test‑trigger operation. Communication interface realizes data exchange with arc‑flash protection main unit and upper‑level monitoring system. On‑board self‑diagnosis monitors panel internal hardware and communication‑link fault.

Application Scenarios Spare‑part replacement for MT‑91‑ARCFPA operation‑panel in medium‑voltage switchgear arc‑flash‑protection system. Local human‑machine interaction for power‑plant, metallurgy and petrochemical medium‑voltage power‑distribution cabinet arc‑flash protection device. Maintenance renewal for legacy ABB arc‑flash‑protection monitoring‑panel equipment.

Installation Requirements Embed MT‑91‑ARCFPA into reserved opening of medium‑voltage‑switchgear cabinet front‑panel, fasten surrounding fixing‑clips, ensure sealing rubber‑ring fits tightly. Complete 24 VDC power‑supply wiring and RS‑485 communication‑bus wiring at rear‑side screw‑terminal block. Communication‑bus cable adopts shielded twisted‑pair, terminate bus‑end with matched bus terminating‑resistor. Implement protective earthing for rear‑side metal shell complying with switch‑cabinet grounding specification. Ambient operating temperature shall maintain within 0 ℃ ~ +50 ℃ without condensation. Complete communication‑parameter setting and data‑display function verification after power‑on.