Power System Protection Solution – AREVA MVAJ101RA0802A | MVAJ Auxiliary Tripping Relay Series
Where This Product Is Used
The AREVA MVAJ101RA0802A is a high-speed auxiliary tripping relay from the MVAJ series, engineered for critical protection and switching duties in electrical power systems. It is widely deployed in the following industrial environments:
- Electrical Substations (HV/MV) – Acts as an interposing tripping relay between protection relays and circuit breaker trip coils, ensuring fast and reliable fault clearance.
- Power Generation Plants – Used in generator protection schemes to initiate rapid disconnection upon detection of differential, overcurrent, or earth fault conditions.
- Industrial Distribution Switchgear – Installed in MCC and switchgear panels to amplify trip signals from numerical relays to multiple breaker coils simultaneously.
- Transmission & Distribution Networks – Deployed in busbar protection and inter-tripping schemes where high-speed, multi-contact operation is mandatory.
- Oil & Gas Facilities – Integrated into ESD and F&G protection logic for rapid de-energization of hazardous electrical equipment.
- Renewable Energy (Wind & Solar) – Used in grid-connection protection panels to isolate inverters and transformers during grid fault events.
Technical Specifications
| Part Number | MVAJ101RA0802A |
| Brand | AREVA (now GE Grid Solutions / Alstom Grid) |
| Series | MVAJ – Auxiliary Tripping Relay |
| Relay Type | High-Speed Auxiliary Tripping Relay |
| Contacts | 8 NO + 2 NC (suffix 0802A) |
| Operating Time | < 8 ms (high-speed) |
| Mounting | Flush panel / 19″ rack drawout case |
| Weight | ~1,000 g |
| Country of Origin | France / UK (AREVA manufacturing) |
Why Engineers Specify This Model
- High-Speed Operation (<8 ms) – Meets stringent operating time requirements of busbar and generator protection schemes.
- 8 NO + 2 NC Contact Configuration – Simultaneously trips multiple breakers, initiates alarms, and drives SCADA signals from a single relay.
- Proven AREVA/Alstom Pedigree – Decades of field-proven reliability in utility and industrial protection applications worldwide.
- Drawout Case Design – Enables relay replacement without disturbing panel wiring, minimizing maintenance downtime.
- Wide Numerical Relay Compatibility – Interfaces directly with AREVA MiCOM, Schneider Sepam, ABB REF, and other protection relay output contacts.
- Compact Footprint – Optimized for space-constrained relay panels and retrofit applications.
Complete System Bill of Materials
For a complete protection and tripping scheme using the MVAJ101RA0802A, engineers typically specify:
- AREVA MiCOM P series numerical protection relay (overcurrent / differential)
- AREVA MVAJ101RA0802A – Auxiliary Tripping Relay (this unit)
- DC auxiliary power supply (24 V / 48 V / 110 V / 220 V DC UPS)
- Circuit breaker with shunt trip coil (compatible voltage rating)
- Test plug / relay test block for drawout case testing
- Relay panel / 19″ rack enclosure with DIN rail mounting
- Insulated terminal blocks (IEC 60947-7-1)
Contact support@konmask.com for bundle pricing on protection panel builds.
Compliance & Industry Standards
- IEC 60255 – Measuring Relays and Protection Equipment
- IEC 61810 – Electromechanical Elementary Relays
- IEC 61511 – Functional Safety for Process Industry Sectors
- IEEE C37.90 – Relays and Relay Systems for Electric Power Apparatus
- ANSI/IEEE C37.100 – Definitions for Power Switchgear
- CE Marking – European conformity for electrical equipment
Quality Assurance & Sourcing
Konmask.com sources the MVAJ101RA0802A through verified industrial automation and power protection distributors with traceable supply chains. Every unit is processed as follows before dispatch:
- Part number, suffix, and nameplate verification against AREVA/GE product documentation
- Physical inspection of drawout case, contact block, and terminal integrity
- Cross-reference against AREVA active and legacy product registry (EOL status confirmed)
- Konmask Certificate of Conformance issued upon request
How to Source This Part
- Add the MVAJ101RA0802A to your cart and proceed to checkout, or
- Email support@konmask.com with your PO number and required delivery date for a formal quotation.
- For bulk orders (>3 units) or project-based procurement, request a volume discount via our contact form.
- Lead time: typically 5–10 business days for available stock; 3–6 weeks for sourced/special-order units.
Application-Specific FAQ
Q: What does the suffix “101RA0802A” indicate?
A: The suffix encodes the relay’s configuration: operating voltage range (101R), contact arrangement (0802 = 8 NO + 2 NC), and design variant (A). Always verify the full part number when ordering.
Q: Is the MVAJ101RA0802A still in production?
A: The MVAJ series was manufactured by AREVA T&D, now part of GE Grid Solutions. This model may be classified as legacy/end-of-life. Konmask sources genuine units from verified stock — contact us to confirm availability.
Q: Can this relay be tested in-situ without panel removal?
A: Yes. The drawout case allows the relay to be withdrawn and a test plug inserted for secondary injection testing without disconnecting panel wiring.
Q: What auxiliary DC voltage does this relay operate on?
A: The operating voltage is defined by the order code. Common variants include 24 V, 48 V, 110 V, and 220 V DC. Confirm the nameplate voltage before installation or contact us with your DC supply voltage for verification.
Q: Is a Certificate of Conformance available?
A: Yes. A Konmask Certificate of Conformance is available at no additional charge upon request. Email support@konmask.com after placing your order.
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