ALSTOM MVAJ13D1GB0780A – Heavy‑duty Auxiliary Tripping Relay for Protection and Lockout Schemes

The ALSTOM MVAJ13D1GB0780A is part of the well‑known MVAJ series of attracted‑armature auxiliary/tripping relays used in substation and industrial switchgear panels. From my experience, the MVAJ13 variant is typically selected for robust trip, interlock, and lockout duties where high contact reliability and clear mechanical indication matter. You might notice that utilities and OEM panel builders favor this series because it fits directly into existing ALSTOM/GE‑heritage protection schemes with minimal wiring changes.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days from delivery.
• Lead time: Typically ships in 1 week if in stock; no more than 1 month at the latest.
• Payment: 50% advance payment; balance due before delivery.
• Express options: FedEx, UPS, DHL.

Key Features

• Heavy‑duty attracted‑armature design – Built for dependable tripping and lockout functions in protection circuits.
• Multiple changeover contacts – Typically provides several high‑reliability C/O contacts for trip, alarm, and interlocking logic.
• High contact rating – In many cases rated up to 10 A for short durations, suitable for breaker trip coils and signalling duties.
• Mechanical flag indication – Clear visual state confirmation for operators during commissioning and fault investigation.
• Draw‑out case for fast replacement – Speeds up maintenance; relay can be withdrawn without disturbing panel wiring.
• Low burden DC coil – Designed for utility DC systems (commonly 110–125 VDC or 220–250 VDC variants).
• Proven field history – The MVAJ family has a long track record in substations, power plants, and heavy industry.

Technical Specifications

Application Fields

This model is suited to switchgear and protection panels where deterministic tripping is required:

• Substation protection schemes (transformer, feeder, busbar trip/lockout).
• Power plants and CHP facilities for breaker trip and interlocking duties.
• Industrial distribution (steel, mining, chemicals) needing hardwired trip logic.
• Retrofits in ALSTOM/GE‑heritage panels where draw‑out interchangeability is important.

A maintenance lead at a utility recently told me the MVAJ13 “seems to be the low‑drama choice” for replacing ageing auxiliaries—fast to swap, easy to test, and no programming headaches.

Advantages & Value for Procurement

• Reliability – Rugged electromechanical construction with clear mechanical indication reduces ambiguity during faults.
• Compatibility – Typically drop‑in for existing ALSTOM MVAJ footprints, minimizing re‑engineering time.
• Serviceability – Draw‑out design speeds up replacement and simplifies periodic testing.
• Cost Control – No firmware licensing or configuration tools; lowers commissioning effort.
• Support – Guidance on coil voltage/contact configuration so the delivered unit matches your scheme drawings.

Installation & Maintenance

• Panel/cabinet – Mount in a clean, ventilated switchgear or control cabinet; keep ambient within typical control room limits.
• Wiring – Follow the relay’s terminal diagram; use ferruled conductors and observe DC polarity. Verify trip circuit supervision before energizing.
• Earthing – Bond relay case and panel earth per site standards to limit interference and ensure operator safety.
• Testing – Function‑test the coil pick‑up/drop‑out and each contact path. Record contact resistance for future trending.
• Routine care – Periodically exercise the relay, inspect terminals for looseness, and clean dust from the draw‑out cradle. No firmware updates required.
• Spares – Keeping a like‑for‑like spare on site typically shortens outage recovery time.

Quality & Certifications

• Manufactured to established utility‑grade standards; typical compliance with CE for low‑voltage control equipment.
• Manufacturer quality systems generally aligned to ISO 9001 for design and production.
• RoHS status can vary for legacy builds; we can confirm per batch on request.
• Warranty: 12 months (365 days) against defects in materials and workmanship.