1. Product Description
Part Number: MVAX31S1DE0754A Manufacturer: Areva (Some business transferred to Orano) Full Name: MVAX Series Multi‑Function Protection Relay This is a medium‑voltage comprehensive digital protection relay for switchgear. It provides protection, measurement, monitoring and logic control for power systems, including overcurrent, earth‑fault and overload protection.
2. Technical Specifications
| Item | Specification |
|---|---|
| Device Type | Digital multi‑function protection relay |
| Series | MVAX31 |
| Model Code | MVAX31S1DE0754A |
| Auxiliary Supply | Wide range DC / AC auxiliary power supply |
| Protection Functions | Overcurrent, earth‑fault, overload, directional protection etc. |
| Inputs | 3‑phase current & voltage measurement inputs |
| Communication | Serial interface for remote supervision system |
| Mounting | Panel flush‑mount for switchgear cubicle |
| Housing | Industrial rugged enclosure for switchgear environment |
| Operating Temperature | -10 ℃ ~ +55 ℃ |
| Ingress Protection | Front panel IP54; internal part IP20 |
| Lifecycle | OEM obsolete; typical third‑party warranty:6‑12 months |
| Application | Medium‑voltage switchgear, power plant & substation distribution protection |
3. Product Performance
- Integrated multiple power protection algorithms. One unit covers overcurrent, earth‑fault and overload functions to reduce component count inside cubicles.
- Built‑in measurement function for current, voltage values. Data can be displayed locally or uploaded to SCADA system.
- Fault recording & event log function for post‑fault diagnosis and root‑cause analysis.
- Local keypad on front panel for parameter setting and status checking without extra tools.
- High immunity against substation electromagnetic disturbance, designed for long‑term continuous operation.
- Modular hardware for convenient maintenance and replacement.
4. Application Fields
- Power Plants: Medium‑voltage auxiliary power circuit protection.
- Substations: Feeder and transformer protection for medium‑voltage systems.
- Heavy‑Industry Plants & Mines: MV switchgear protection inside industrial facilities.
- Public utility power distribution infrastructure.
Note: Areva proprietary model. Not directly interchangeable with relays of other brands. Protection logic, wiring and setting parameters shall be fully verified before replacement.
5. Related Series Part Numbers (MVAX Family)
| Part No. | Description |
|---|---|
| MVAX31S1DE0753A | MVAX multi‑function relay, alternative firmware variant |
| MVAX31S2DE0754A | MVAX31 second hardware variant |
| MVAX21S1DE0521A | MVAX21 basic protection relay |
| MVAX41S1DE0810A | MVAX41 advanced‑feature protection relay |
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