Jun172026
MVTU11K1CD0751G

ALSTOM MVTU11K1CD0751G | VT Voltage Transformer Supervision Midos Draw-out Relay Low-Burden 110VDC – Field Service Notes

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Component Snapshot At-a-Glance Model: MVTU11K1CD0751G Alt. P/N: MVTU11B1CD0751G (medium-burden coil variant, higher DC draw); MVAW11 (standalone over/undervoltage, no VT fault discrimination); MCGG series (current-only, no voltage circuit supervision) Product Series: MVTU Midos static VT supervision relay family, shared rack base footprint with MCGG/MVAJ/MVAX/MVTT relays Hardware Type: Full withdrawable plug-in static voltage transformer monitoring relay, blue…

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Jun172026
ALSTOM MVAW11B1AB0513A

ALSTOM MVAJ27L1FB0784D | Time Delayed Drop-off Mechanical Latching Midos Trip Relay Low-Burden 110VDC – Field Service Notes

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Component Snapshot At-a-Glance Model: MVAJ27L1FB0784D Alt. P/N: MVAJ27B1FB0784D (medium-burden coil variant, higher DC draw); MVAJ28 (electrical reset only); MVAJ53 (no internal drop-off delay) Product Series: MVAJ Midos electromechanical trip/lockout relay family, shared rack base with MCGG/MVAX/MVTT protection relays Hardware Type: Full withdrawable plug-in latching trip relay, blue aluminum industrial chassis, transparent front window with mechanical…

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Jun172026
MAVS01L1AB0501D

ALSTOM MAVS01L1AB0501D | Midos Draw-out Frequency Speed Monitoring Relay 24VDC Low Burden Rotating Machine Protection – Field Service Notes

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Component Snapshot At-a-Glance Model: MAVS01L1AB0501D Alt. P/N: MAVS01H1AB0501E (high-burden 24VDC coil variant, higher DC draw); MCHN series (only undercurrent detection, no frequency/speed measurement) Product Series: MAVS Midos static speed/frequency monitoring relay family, shared rack base mechanical footprint with MCGG/MVAJ/MVTT protection relays Hardware Type: Full withdrawable plug-in static frequency/speed detection relay, blue painted aluminum industrial chassis,…

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Jun172026
ALSTOM MVAW11B1AB9007A

ALSTOM MVAW11B1AB9007A | Midos Draw-out AC Over/Undervoltage Static Protection Relay 110VDC Medium Burden – Field Service Notes

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Component Snapshot At-a-Glance Model: MVAW11B1AB9007A Alt. P/N: MVAW11L1AB9007A (low-burden coil variant, lower DC draw); MVUA11 (compact panel mount non-Midos voltage relay); MCGG series (current-only, no AC voltage measurement) Product Series: MVAW Midos static voltage protection relay family, shared rack base footprint with MCGG/MVAJ/MVTT/MCTI relays Hardware Type: Full withdrawable plug-in static single-phase AC voltage relay, yellow…

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Jun172026
MFAC14K1AA0001A

ALSTHOM MFAC14K1AA0001A | High Impedance Differential Midos Draw-out Busbar Transformer Protection Relay – Field Service Notes

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Component Snapshot At-a-Glance Model: MFAC14K1AA0001A Alt. P/N: MFAC14B1AA0001A (medium-burden coil variant, higher DC draw); MCAG14 (alternate high impedance frame, different CT burden handling); MCGG series (overcurrent only, no differential zone comparison) Product Series: MFAC Midos static high impedance differential protection relay family, shared rack base with MCGG/MVAJ/MVTT relays Hardware Type: Full withdrawable plug-in static high…

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Jun172026
MCGG62N1CB0753F

ALSTHOM MCGG62N1CB0753F | 3-Phase IDMT Overcurrent Midos Draw-out Relay Instantaneous High-Set MV Feeder Protection – Field Service Notes

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Component Snapshot At-a-Glance Model: MCGG62N1CB0753F Alt. P/N: MCGG62B1CB0753F (medium-burden coil variant, higher DC draw); MCGG52 (2-phase + earth fault, missing third phase measurement); MCGG82 (3-phase + residual earth fault) Product Series: MCGG Midos static numerical overcurrent relay family, unified rack base footprint matching MVAJ/MVAX/MCTI relays Hardware Type: Full withdrawable plug-in static 3-phase overcurrent protection relay,…

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Jun172026
MAVS01L1AB0751D

ALSTHOM MAVS01L1AB0751D | Variable Speed Auxiliary Midos Draw-out Relay Turbine Motor Frequency Speed Monitoring – Field Service Notes

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Component Snapshot At-a-Glance Model: MAVS01L1AB0751D Alt. P/N: MAVS01H1AB0751E (high-burden coil variant, higher DC draw); MCHN series (undercurrent only, no frequency speed measurement) Product Series: MAVS Midos static speed/frequency monitoring relay family, shared rack base with MCGG/MVAJ/MVTT protection relays Hardware Type: Full withdrawable plug-in static frequency/speed detection relay, blue painted aluminum industrial chassis, transparent front adjustment…

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Jun172026
MVAJ53H1LB0856A

ALSTHOM MCTI40F1AB0751F | 3-Phase Instantaneous Overcurrent Midos Draw-out Relay Breaker Fail Protection – Field Service Notes

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Component Snapshot At-a-Glance Model: MCTI40F1AB0751F Alt. P/N: MCTI40N1AB0751G (low-burden coil variant, different DC draw); MCTI39 (2-phase only, no full 3-phase monitoring); MCTI19 (single-phase compact unit) Product Series: MCTI Midos instantaneous current detection relay family, shared rack base with MCGG/MVAJ/MVAX protection relays Hardware Type: Full withdrawable plug-in static 3-phase instantaneous overcurrent relay, blue painted aluminum industrial…

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Jun172026
VAJX11BP5243BA

ALSTHOM VAJX11BP5243BA | Compact Self-Reset Auxiliary Plug-In Relay 110VDC Protection Panel Interlock – Field Service Notes

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Component Snapshot At-a-Glance Model: VAJX11BP5243BA Alt. P/N: VAJX11DP5243BA (low-burden coil variant, different DC draw); VAJX13 (mechanical hand-reset latch version); MVAJ series (Midos draw-out rack form factor, incompatible base) Product Series: VAJX compact plug-in auxiliary relay family, standard panel flush mount, separate from Midos draw-out relay lineup Hardware Type: Fixed panel mount attracted armature electromechanical auxiliary…

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Jun172026
MVAJ53H1LB0856A

ALSTHOM MVAJ53H1LB0856A | High-Burden Hand-Reset Midos Draw-out Trip Relay 110VDC Breaker Lockout – Field Service Notes

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Component Snapshot At-a-Glance Model: MVAJ53H1LB0856A Alt. P/N: MVAJ53D1LB0856A (low-burden coil variant, different DC draw); MVAA14 (electrical reset no mechanical flag); MVAJ23 (smaller contact stack, narrower rack footprint) Product Series: MVAJ Midos draw-out tripping relay family, shared rack base with MCGG/MVAX/MVTT protection relays Hardware Type: Full withdrawable plug-in hinged armature trip relay, yellow aluminum industrial chassis,…

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