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Help CenterALSTOM MVAW11B1AB9007A – Auxiliary Protection Relay for Trip/Interlock Duties in Power Systems
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Warranty: 365 days
Delivery: 1 week if in stock; no more than one month at the latest
Payment: 50% advance payment; full payment before delivery
Express options: FedEx, UPS, DHL
Hardwired reliability – Pure electromechanical design with no firmware; in many cases preferred for critical trip/interlock tasks.
Single changeover output – MVAW11 series is commonly configured with one Form C (SPDT) contact for simple, robust control logic.
DC coil variants – Typically offered in 110 VDC or 220 VDC coils (other DC voltages exist in the family), helping match existing panel supplies.
High contact rating – Suited for breaker trip coil duty and signal duplication; seems to handle resistive loads comfortably in utility panels.
Panel-friendly mounting – Designed for protection cubicles and switchgear doors; straightforward wiring and maintenance.
Noise-tolerant operation – Good immunity to substation noise compared with sensitive electronic inputs.
| Brand / Model | ALSTOM MVAW11B1AB9007A |
| HS Code | 8536.49.00 (Relays for a voltage > 60 V) |
| Power Requirements | DC coil (variant-dependent; commonly 110 VDC or 220 VDC in this series) |
| Signal I/O Types | Coil input (DC); 1x Form C (SPDT) dry contact output typical of MVAW11 |
| Communication Interfaces | None (hardwired relay) |
| Installation Method | Panel/switchgear mounting in protection cubicles; front-wired terminals |
| Operating Temperature | Typically -10°C to +55°C for this family (check nameplate for the specific unit) |
| Dimensions & Weight | Compact relay case; variant-specific. We can verify exact case size against the MVAW11B1AB9007A plate. |
You might notice that utilities and EPCs keep these relays on BOMs for the “must-work” links in a scheme. Typical uses include:
Substation breaker tripping and closing interlocks
Signal duplication and galvanic isolation for SCADA/RTU inputs
Lockout, blocking, and permissive logic in protection panels
Turbine/generator and plant auxiliaries where a dedicated hardware relay is preferred
Process safety tie-ins where fail-safe, visible hardwiring is requested
Dependable sourcing – Helpful for maintaining legacy ALSTOM/GEC protection panels without redesign.
Compatibility – Works cleanly with DC trip circuits, MiCOM/Agile relays, and common RTU I/O—no protocol headaches.
Lifecycle savings – Minimal commissioning effort and practically zero firmware maintenance.
Support – We can cross-check coil voltage, contact arrangement, and mounting details by serial to avoid misorders.
Customer feedback (utility O&M lead): “We swapped an older auxiliary with an MVAW11 unit last outage—wiring matched our drawing, and trip timing stayed consistent. It’s been trouble-free.”
Installation & MaintenancePanel/cabinet – Install in a clean, dry IEC-rated enclosure with basic ventilation. Keep DC supply within the specified coil range.
Wiring – Use ferruled, labeled conductors; segregate DC trip wiring from high-noise conductors where practical. Verify polarity on DC coils.
Commissioning – Perform a contact continuity check, coil pickup test at nominal and at -10%/-15% supply if required by site procedures.
Routine maintenance – Periodic functional trip checks; inspect terminals for looseness; clean dust with dry air; replace if contact wear or discoloration is evident.
Safety – Isolate DC supplies, verify zero energy, and tag before handling. Where fitted, observe arc-suppression networks across coils.
Manufactured within ALSTOM/GE Grid Solutions quality systems (typically ISO 9001)
CE marking customary for EU markets; RoHS applicability depends on production year and configuration
Utility-proven electromechanical design with long field history
Standard warranty: 365 days
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