中文版
Description
Product Overview: ALSTOM MVAJM14JB1004A1 Protection Relay
1. General Description
The MVAJM14JB1004A1 is a numeric protection relay from the renowned Micom P14x series, originally manufactured by ALSTOM (now part of GE Grid Solutions). This specific model is configured as a versatile feeder management relay, designed primarily for the protection, control, and monitoring of electrical distribution feeders in medium-voltage switchgear.
It is a compact and highly functional device that provides essential protection for cables and lines, while also offering advanced control logic, metering, and communication capabilities. Its primary role is to ensure the safety and reliability of electrical distribution networks by quickly isolating faulted sections.
2. Key Features and Functions
- Comprehensive Feeder Protection: Includes a robust set of protection functions ideal for distribution feeders:
- Phase Time Overcurrent (51) & Instantaneous Overcurrent (50): Primary protection for phase-to-phase and three-phase faults.
- Earth Fault / Ground Time Overcurrent (51N/51G) & Instantaneous (50N/50G): Sensitive protection for ground faults.
- Negative Phase Sequence (46): Protects against phase unbalance caused by single-phasing or uneven loads.
- Thermal Overload (49): Protects connected cables or transformers from thermal damage based on measured current.
- Underfrequency (81U) & Overfrequency (81O): For load-shedding or system protection schemes.
- Under voltage (27) & Over voltage (59): Protects against abnormal system voltage conditions.
- Directional Overcurrent (67/67N): (Optional function, depends on firmware and hardware) Essential for selective tripping in ring main or parallel feeder systems.
- Control and Automation:
- Integrated Programmable Logic Controller (PLC) functionality for designing custom automation sequences without additional hardware.
- Multiple configurable binary inputs (BIs) and output relays (BOs) for interlocking, control, and alarm signaling.
- Monitoring and Metering:
- Real-time measurement of Ia, Ib, Ic, In, Vab, Vbc, Vca, frequency, power (kW, kVAR, kVA), power factor, and energy.
- Accurate recording of demand values.
- Communication and Integration:
- Features multiple standard communication ports.
- Supports common industrial protocols such as IEC 60870-5-103, Modbus® RTU (serial). The specific hardware variant may support additional protocols like Profibus-DP or DNP3 via optional modules.
- Enables seamless integration into Supervisory Control and Data Acquisition (SCADA) systems and Remote Terminal Units (RTUs).
MVAJ23T1GB0774B
- Human-Machine Interface (HMI):
- A backlit graphical LCD display for clear visualization of measurements, status, and fault information.
- Intuitive keypad for local configuration, accessing event logs, and manual control.
- Event Recording and Oscillography:
- Detailed Sequence of Events (SOE) recorder with millisecond accuracy for diagnosing trip sequences.
- Fault record (oscillography) capture to analyze the waveform during a fault condition.
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | IEC 60255, IEC 60947, IEEE C37.90 |
| Auxiliary Supply (Vs) | A common rating for the “J” code is 110 – 250 V DC / 100 – 240 V AC. (Must be confirmed from the unit’s nameplate). |
| Rated Input Current (In) | The “04” in the code typically indicates a 1 A rating. |
| Current Inputs | 4 analog inputs (3 phase + 1 neutral). |
| Voltage Inputs | Supports 3 phase-to-phase voltage inputs (optional for full functionality). |
| Binary Inputs | Typically 5 to 7 programmable digital inputs. |
| Output Relays | Typically 5 to 7 programmable changeover (CO) relay contacts. |
| Communication Ports | • 1x Front port (RS485 for PC connection via software) • 1x Rear port (RS485 for system integration, e.g., Modbus RTU) • Optional rear communication modules for other protocols. |
| Protective Functions | As listed in Key Features (Overcurrent, Earth Fault, Thermal, etc.). |
| Ambient Temperature | Operation: -25°C to +70°C (-13°F to +158°F). Storage: -40°C to +85°C. |
| Mounting | Panel-mounted, designed for standard 19″ rack or flush mounting. |
4. Ordering Code Breakdown: MVAJM14JB1004A1
- M: Micom family
- VAJ: Specific series/model (P14x platform)
- M: Hardware variant/package style
- 14: Software option (This denotes the firmware is configured for Feeder Protection application). This is the key difference from the “25” code for motor protection.
- J: Power supply code (likely indicating a 110-250V AC/DC range)
- B: Communication option (e.g., Base model with standard serial ports)
- 1004: Case style and CT rating. “04” strongly indicates a 1A current transformer input rating.
- A1: Version or revision code
5. Typical Applications
The MVAJM14JB1004A1 is ideally suited for:
- Incoming and Outgoing Feeders in industrial plant switchgear.
- Ring Main Unit (RMU) protection and control.
- Distribution Substations for utility applications.
- Protecting cables and lines in mining, oil & gas, and manufacturing power systems.
- Serving as a backup protection device for transformers.
6. Important Note
- ALSTOM’s grid business was acquired by General Electric and is now part of GE Grid Solutions. This product is supported by GE.
- The key difference between this model (MVAJM14JB1004A1) and the previously discussed motor relay (MVAJM25LA1010A) lies in the software option code (“14” vs. “25”). This code determines the pre-configured application-specific firmware, making the “14” model optimized for feeder protection, while the “25” is optimized for motor protection.
- For absolute accuracy regarding configuration and specifications for a specific unit, always refer to the official product manual, nameplate, or data sheet from GE Grid Solutions.
Please contact Sunny sales@xiongbagk.cn for the best price.
➱ sales manager: Sunny
➱ email mailto: sales@xiongbagk.cn
➱ Skype/WeChat: 18059884797
➱ phone/Whatsapp: + 86 18059884797
➱ QQ: 3095989363
➱ Website:www.sauldcs.com
