AREVA MVAJ101RA0802A Service-Ready Spare Part for Industrial Maintenance

AREVA MVAJ101RA0802A Service-Ready Spare Part for Industrial Maintenance

The AREVA MVAJ101RA0802A is a ruggedized tripping relay module engineered for demanding industrial protection and control applications. As a critical spare part in substation automation, motor protection panels, and high-voltage switchgear control cabinets, this module plays a central role in fault isolation, trip circuit supervision, and emergency shutdown sequences. Sourced as an original replacement unit, the MVAJ101RA0802A is fully tested prior to shipment and backed by a 12-month warranty, making it a reliable choice for maintenance engineers managing aging protection systems or building strategic spare parts inventories.

Unplanned downtime caused by a failed tripping relay can cascade into extended outages across entire protection zones. Procurement engineers and site maintenance teams increasingly recognize the MVAJ101RA0802A as a high-priority line item in annual maintenance budgets — particularly in facilities operating legacy AREVA or Schneider Electric protection schemes where original replacement parts are becoming harder to source through standard distribution channels. Our stock is verified, serialized, and dispatched with full inspection documentation to support your incoming quality control process.

Spare Maintenance Table

Maintenance Planning for Continuous Operation

When replacing the MVAJ101RA0802A tripping relay module during a scheduled or emergency maintenance event, a thorough inspection of the surrounding protection circuit is essential to prevent repeat failures and ensure the integrity of the entire trip chain. Maintenance engineers should treat this replacement as an opportunity to audit the full protection panel.

Begin by verifying the DC auxiliary power supply feeding the trip coil circuit — a degraded or undersized 24 V or 110 V DC power supply module can cause intermittent relay operation and premature coil burnout. Check the trip circuit supervision (TCS) wiring and associated fuse links or miniature circuit breakers protecting the DC bus. Inspect the AREVA MiCOM P series protection relay (such as the MiCOM P122, P123, or P141) that issues the trip command to the MVAJ101RA0802A — confirm that output relay contacts on the protection relay itself are within specification and not exhibiting contact wear or welding.

Review the binary input (BI) and binary output (BO) modules in the same protection panel, as these I/O cards interface directly with the trip relay logic. If the panel includes a communications module (IEC 61850 GOOSE messaging or DNP3 serial interface), verify that trip commands transmitted over the station bus are being correctly received and executed. Aging signal isolators or optocoupler-based isolation modules between the protection relay and the tripping relay should also be inspected, as these components degrade over time in high-temperature environments.

For panels incorporating terminal blocks and wiring harnesses — particularly Phoenix Contact or Weidmüller-style screw terminals — check for loose connections, oxidized contacts, and insulation degradation on the DC control wiring. A loose terminal on the trip coil circuit is a common root cause of nuisance trips or failure-to-trip events. If the control cabinet includes a HMI panel or local annunciator, confirm that alarm outputs from the MVAJ101RA0802A are correctly mapped and that the HMI firmware is current.

Procurement engineers building annual spare parts kits for facilities running AREVA protection schemes should consider stocking complementary items alongside the MVAJ101RA0802A: auxiliary DC power supply modules rated for the panel’s bus voltage, spare output relay cards for the MiCOM P series, DIN rail-mount fuse holders and fuse links for the DC control circuit, and at least one spare communications interface module if the substation uses IEC 61850 or MODBUS RTU. A proactive spare parts strategy that covers the full protection chain — from the protection relay through the tripping relay to the circuit breaker trip coil — dramatically reduces mean time to repair (MTTR) during unplanned outages.

Site Replacement Workflow

Step 1 — Isolation and Safety: Isolate the protection panel from the DC auxiliary supply. Follow your site’s lockout/tagout (LOTO) procedure. Confirm that the circuit breaker associated with this protection zone is in the open and locked position before proceeding.

Step 2 — Documentation: Photograph the existing wiring connections to the MVAJ101RA0802A before removal. Record the terminal designations and wire labels. Cross-reference against the panel wiring diagram (typically stored in the relay settings file or panel documentation folder).

Step 3 — Module Removal: Disconnect the wiring harness or terminal block connections. Release the DIN rail mounting clip or unscrew the panel-mount fasteners. Remove the failed MVAJ101RA0802A module carefully to avoid disturbing adjacent components.

Step 4 — Compatibility Verification: Confirm that the replacement MVAJ101RA0802A matches the coil voltage rating, contact configuration, and firmware revision (if applicable) of the original unit. Check the module label against the panel nameplate and the original purchase order or maintenance record.

Step 5 — Installation and Wiring: Mount the replacement module on the DIN rail or panel. Reconnect all wiring per the documented terminal assignments. Torque terminal screws to the manufacturer’s specification to ensure reliable contact.

Step 6 — Functional Test: Restore DC auxiliary power. Perform a trip circuit continuity test using a secondary injection test set or the protection relay’s built-in test function. Verify that the MVAJ101RA0802A operates correctly across its full contact set. Confirm alarm and indication outputs are functioning at the HMI or SCADA level.

Step 7 — Return to Service: Remove LOTO devices. Return the circuit breaker to service. Update the maintenance log with the replacement date, module serial number, and test results. Flag the failed unit for root cause analysis before disposal or return.

This structured replacement workflow minimizes downtime, ensures system compatibility, and creates a traceable maintenance record — all critical requirements for facilities operating under IEC 61511, IEC 62061, or ISO 55001 asset management frameworks.

Spare Parts Support FAQ

Q1: Is the MVAJ101RA0802A still available as a new original part, and what is the lead time?
The AREVA MVAJ101RA0802A is a legacy protection relay module that may no longer be in active production under the current Schneider Electric / GE Grid Solutions portfolio. However, we maintain verified stock of original and refurbished-to-specification units. In-stock orders typically ship within 1–3 business days. For sourced or allocated stock, lead times range from 5 to 15 business days depending on global inventory availability. Contact our team for real-time stock confirmation before placing a critical-path order.

Q2: How do you verify compatibility before shipment, and what testing is performed?
Each MVAJ101RA0802A unit undergoes a pre-shipment inspection that includes coil resistance measurement, contact continuity and insulation resistance testing, and a functional energization test at rated coil voltage. Units are serialized and shipped with an inspection report. We recommend that your incoming quality control team perform a secondary verification test upon receipt, particularly for units destined for safety-critical trip circuits.

Q3: What does the 12-month warranty cover, and how are warranty claims handled?
Our 12-month warranty covers manufacturing defects, premature component failure under normal operating conditions, and any discrepancy between the shipped unit and the confirmed order specification. Warranty claims are handled by contacting our technical support team at sale@ninermas.com with the original order number, a description of the failure mode, and photographic evidence of the installation. We will arrange for a replacement unit to be dispatched or a full refund at our discretion. The warranty does not cover damage caused by incorrect installation, overvoltage events, or failure to follow the site replacement workflow.

Q4: Can you support long-term supply agreements for facilities with multiple AREVA protection panels?
Yes. We offer long-term supply agreements and blanket purchase order arrangements for facilities managing large fleets of AREVA or legacy Schneider Electric protection relays. These agreements provide price stability, guaranteed stock reservation, and priority dispatch for emergency orders. Procurement engineers managing multi-site operations or annual maintenance contracts are encouraged to contact us to discuss a customized supply arrangement that aligns with your planned maintenance schedule and spare parts budget cycle.