Home > Products > ALSTOM > ALSTOM MVAJ23B1AB0757B – Heavy?Duty Auxiliary/Tripping Relay for Protection Panels
ALSTOM MVAJ23B1AB0757B – Heavy?Duty Auxiliary/Tripping Relay for Protection Panels
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Product Details
| HS Code | 8536.49 | Stock Status | In Stock | |
| Product Color | Brand New OR Used | Warranty | 12-month Warranty | |
| Trademark | ALSTOM | Origin | France |
Product Description
Warranty: 365 days
Lead time: 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
Packaging: anti?static, shock?absorbing export packing; relay shipped with protective case cover
Heavy?duty attracted armature – Designed for trip/interlock duty in protection systems with fast pickup and robust mechanics.
Multiple changeover contacts – Typically provides several volt?free C/O contacts for parallel signaling and control.
Draw?out case – You might notice the Midos?pattern draw?out style that simplifies testing and replacement without disturbing panel wiring.
Coil voltage flexibility – Common coils are 110/125 Vdc or 220/250 Vdc; matching the installed scheme is straightforward.
Clear indication – Many MVAJ variants include mechanical flags for quick trip status at the panel (hand reset or self reset depending on code).
IEC protection practice – Built for utility environments, typically aligned with IEC 60255 performance expectations.
| Brand / Model | ALSTOM MVAJ23B1AB0757B (MVAJ 20?series auxiliary / trip relay) |
| HS Code | 8536.49 (Other relays, for a voltage exceeding 60 V) |
| Power Requirements (Coil) | DC trip coil; commonly 110/125 Vdc or 220/250 Vdc depending on suffix. Verify nameplate for this exact unit. |
| Signal I/O Types | Volt?free changeover contacts (C/O), suitable for control and signaling circuits |
| Contact Ratings | Typically up to 10 A at 250 Vac / 30 Vdc (resistive); derate for inductive loads or fit suppression |
| Operating Temperature | Typically ?10 °C to +55 °C |
| Communication Interfaces | None (electromechanical relay) |
| Installation Method | Flush panel mounting, draw?out case with rear terminals (Midos?style) |
Note: The exact coil voltage, contact arrangement, and reset/flag options are defined by the full code “MVAJ23B1AB0757B”. If you share a photo of the nameplate, we can confirm specifics before shipping.
Medium and high?voltage switchgear protection panels (breaker trip/interlock)
Substation control and automation cubicles for signaling and scheme logic
Generator and transformer protection schemes (auxiliary trip, lockout assistance)
Retrofit of legacy ALSTOM/AREVA/GE protection panels needing form?fit?function compatibility
Reliability in trip duty: MVAJ units are known for consistent pick?up and strong contact pressure, even after years in service.
Compatibility: Draw?out case and terminal pattern match existing protection panels in many cases, minimizing wiring changes.
Procurement efficiency: Faster commissioning compared with re?engineering logic around a different relay family.
Support and spares: We help confirm coil voltage, contact mapping, and any suppression accessories to avoid site delays.
One thing I appreciate is how maintenance techs can test these in a cradle without disturbing panel wiring. A utility customer told us they swapped in a like?for?like MVAJ in under 15 minutes during a planned outage—no terminal rework, just verify coil voltage and go.
Installation & MaintenancePanel/cabinet: Mount in a clean, ventilated protection cabinet; allow front clearance for draw?out handling.
Wiring: Use ferruled conductors; confirm coil voltage on the nameplate before energizing; observe polarity for any DC suppression modules.
Trip circuit health: Keep total loop resistance within scheme limits; apply surge suppression across inductive loads to protect contacts.
Routine checks: Function test at intervals (often 6–12 months), verify contact resistance, clean dust, and check flag/reset operation.
Spare strategy: Keep at least one spare relay with the same coil and contact configuration for critical feeders or transformers.
Designed in line with utility protection practice and IEC 60255 performance concepts
Typically CE?marked when supplied for the EU market
RoHS applicability may vary with production batch; we can confirm upon request
Supplied with a 365?day warranty
Midos?style test block (e.g., ALSTOM/GE MMLG) for safe secondary testing
Arc?suppression components (RC snubbers or diodes) for inductive loads across contacts
Replacement terminal labels, case gaskets, and draw?out cradle hardware
If you can share the exact scheme requirement (coil voltage, number of C/O contacts, reset/flag preference), we’ll match it against MVAJ23B1AB0757B and ship the correct unit with test data.
Company Profile
Xiamen Xiongba E-commerce Co., Ltd. is a control system component company, located in Siming District, Xiamen, a beautiful coastal city. Xiamen Xiongba E-commerce Co., Ltd. is one of the largest control system components in China, focusing on industrial automation PLC and DCS modules. Our company has 20 years of experience in the field of automatic control. We specialize in supplying world-renowned brands: Allen Bradley, ABB, General Electric, Triconex, Honeywell, Bentley Nevada, Schneider, Hima, and even some...
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