Description
Product introduction
In a substation or industrial switchgear panel, the trip relay forms part of the hardwired path between a protection system and the circuit-breaker control circuit. The GE AREVA MVAJ101RB0800A is intended for this type of relay switching application, where the correct operating voltage, contact arrangement, and reset behavior are essential to dependable protection-system operation.
For maintenance teams supporting legacy MVAJ installations, the GE AREVA MVAJ101RB0800A should be selected by its complete model number rather than family name alone. Before installation, check the relay’s terminal configuration, control-circuit burden, reset behavior, and compatibility with the existing trip circuit. MVAJ-family documentation describes different voltage, burden, and reset variants, so these details should not be inferred from a similar-looking part number.
Key technical specifications
| Parameter | Specification |
|---|---|
| Product model | MVAJ101RB0800A |
| Manufacturer / brand | GE / AREVA |
| Series | MVAJ |
| Product type | Trip and control relay |
| Rated voltage | 110–125 V DC |
| Contact count | 10 |
| Reset / flag configuration | Verify the RB variant against the unit label and official connection diagram |
| Electrical interface | Hardwired relay terminals |
| Communication protocol | Not applicable; conventional relay switching |
| Mounting / case | MVAJ family uses MIDOS case formats; confirm exact case and terminal layout |
| Contact ratings | Use the applicable MVAJ datasheet and circuit load requirements |
| Operating temperature | Verify against the specific technical documentation |
| Protection rating | Not confirmed for this exact part |
| Lifecycle status | Listed as discontinued; confirm current supply status |
The MVAJ family includes different contact counts, voltage ratings, and reset arrangements. Family-level specifications should not be treated as verified ratings for every suffix.
Application scenarios and maintenance concerns
- Circuit-breaker tripping: Switches a hardwired control signal within an electrical protection scheme.
- Protection-panel maintenance: Serves as a replacement component in existing relay panels where the original wiring and mounting arrangement must be retained.
- Lockout and control logic: Supports relay-based switching functions, subject to the installed model’s actual configuration.
- Legacy system restoration: Helps maintain older protection equipment when the original relay is no longer in active production.
Field engineering note: Before removing the existing relay, document all terminal connections and confirm the trip-circuit voltage. After replacement, carry out the applicable trip-path, contact-operation, and reset checks under the site’s approved commissioning procedure. Do not test by initiating an uncontrolled live breaker trip.
Related models and identification
| Model | Relationship |
|---|---|
| MVAJ101RA0800A | Closely related 10-contact, 110–125 V DC MVAJ model; suffix differs, so do not assume interchangeability. |
| MVAJ101 series | Same general relay family; exact contact and reset characteristics depend on the complete type code. |
| MVAJ05 / MVAJ20 series | Related MVAJ tripping and control relay families, with different configurations and case arrangements. |
Engineer’s replacement checklist
- Verify the complete part number. Confirm every character, including
RB0800A, against the installed relay label. - Check electrical compatibility. Verify the 110–125 V DC supply, control-circuit burden, contact switching requirements, and the manufacturer’s connection diagram.
- Confirm the functional configuration. Check contact assignments, reset behavior, flag indication, case size, and terminal numbering before commissioning.
Frequently asked questions
1. What is the MVAJ101RB0800A?
It is listed as a GE / AREVA MVAJ-series protective tripping relay used in hardwired electrical protection and control circuits.
2. What is its operating voltage?
Part listings specify 110–125 V DC. Confirm the rating on the physical nameplate before installation.
3. How many contacts does it have?
The part listing identifies a 10-contact configuration. The exact normally open and normally closed contact arrangement must be checked against the matching wiring diagram.
4. Can it replace MVAJ101RA0800A?
Not without checking the suffix-specific wiring and operating characteristics. The two part numbers are similar, but similarity does not prove direct interchangeability.
5. Is the model discontinued?
The exact part is listed as discontinued by the manufacturer. Existing-stock availability and condition should be confirmed at the time of procurement.
6. What information should be supplied when requesting a replacement?
Provide a clear nameplate photo, the complete model number, the relay wiring diagram or terminal schedule, and the application voltage. These details help verify the correct configuration before ordering.
