Product Overview

• Part No: MVAW11B1AB9007A
• Brand: ALSTOM

• Category: Trip Circuit Supervision RelayMVAW11B1AB9007A belongs to ALSTOM classic MVA series plug-in auxiliary relay. It continuously monitors the continuity of circuit breaker trip circuit, detecting circuit breakage, fuse failure, auxiliary contact abnormality and power loss. Once a fault is detected, the relay triggers remote alarm signal to avoid protection failure caused by unavailable trip loop during electrical faults. With robust mechanical contact structure and transparent protective cover, it serves as standard spare equipment for secondary protection cabinets in thermal power plants and high-voltage substations.

• 
  

Core Features

• Real-time continuity monitoring of breaker trip circuit, reliable fault early warning
• Built-in anti-chatter delay function to prevent false alarms during breaker action
• Transparent front cover for status observation and convenient wiring inspection
• Standard plug-in modular design, supporting fast on-site replacement
• Heavy-duty changeover dry contacts for alarm signal output
• Strong electromagnetic interference resistance, adapted to substation harsh environment

• Passed EMC, vibration and thermal cycling reliability testing for long-term continuous operation

• 
  

Technical Specifications

• Auxiliary Supply: 110V/220V DC
• Operating Frequency: 50/60Hz
• Operating Temperature: -20°C ~ +60°C
• Storage Temperature: -40°C ~ +85°C
• Installation: Standard chassis plug-in mounting

• Front Protection Class: IP40

• 
  

Compatibility & Application

• Matches ALSTOM legacy secondary protection cabinet system
• Widely used in thermal power plants, captive power stations and distribution substations
• Applied for circuit breaker trip loop supervision, protection system safety monitoring and fault alarm