ALSTOM MMLG02R1AA0001E Test Block

Technical Specifications

Key Technical Characteristics

• Non-Intrusive Testing Capabilities: Technicians can perform comprehensive monitoring and secondary injection testing while keeping the primary protection wiring intact, which significantly reduces system downtime.
• Automatic CT Shorting: The internal contact logic automatically shorts current transformer secondary circuits before the protection relay is isolated, maintaining circuit integrity during the testing sequence.
• Rugged Vertical Design: Optimized for space-constrained panels, the vertical orientation allows for dense installation alongside MiCOM Agile or MiDOS series relays.
• Enhanced Operational Safety: The test block includes dedicated isolation points that prevent accidental tripping of the circuit breaker during relay calibration or inspection.
• Legacy Compatibility: While this specific model serves as a vital replacement part for existing infrastructures, it remains fully compatible with a wide range of legacy safety systems and modern substation automation frameworks.

The ALSTOM MMLG02R1AA0001E is a high-reliability test block specifically engineered for integration into busbar protection and power distribution systems. As a vital component of the MMLG series, this module facilitates the safe isolation and secondary injection testing of protective relays without requiring any physical disconnection of the permanent wiring. Its vertical mounting configuration and size 2 case format make it a standard interface for technicians conducting routine maintenance and performance verification in high-voltage environments.