ALSTOM MVAJ23B1AB0757B Current Relay

Enhanced Multiple Protection Mechanisms:
Inherits the inverse-time overcurrent protection of the same series (delayed cut-off is activated when the current exceeds 1.3 times the rated value), and adds adaptive short-circuit protection with a response time ≤8ms; thermal protection is upgraded to dual temperature sensor monitoring (module surface + internal core components), and supports a three-level derating strategy (75%→50%→25% power output) when overheated.
Example: When the internal temperature exceeds 85°C, the system automatically switches to 50% power operation to avoid shutdown due to overheating.

Industrial Communication and Edge Computing:
Standard with Modbus TCP/IP and PROFINET interfaces, and adds the OPC UA communication protocol to support real-time data interaction with cloud platforms; edge computing capabilities are improved, enabling local data processing and filtering of invalid signals (such as removing harmonic interference data) to reduce upload bandwidth occupation.

Power Density and Load Adaptation:
The "23" in the model may represent the power level (e.g., 230W), which is about 10% higher than the "21" series (210W). The output voltage/current may be 24V DC/3A (supporting short-term peak current of 5A), adapting to high-dynamic load scenarios (such as servo motor drives).

Intelligent Interaction and Debugging:
Equipped with a 3.5-inch color touch screen, supporting visual parameter configuration (such as dynamic adjustment of protection thresholds) and graphical display of fault codes (including fault location schematics); integrated with Bluetooth 5.0 interface, allowing remote monitoring of real-time data (such as voltage fluctuation curves and temperature trends) through a mobile APP.

System Collaboration and Reliability:
The current sharing control algorithm is optimized, and the current unbalance degree during parallel operation of multiple modules is ≤±1.5%, supporting hot-swappable module replacement; if used in a battery management system, it adds a lithium battery state of health (SOH) estimation function, which predicts the remaining battery life through internal resistance monitoring.

Detection and Sampling Unit:
Adopts high-precision MEMS current sensors (range 0-5A, error ≤0.3%) and voltage divider resistor networks, supporting broadband signal collection of 50-5000Hz, adapting to high-frequency harmonics in new energy grids (such as 1000Hz harmonics generated by photovoltaic inverters); the sampling rate is increased to 100kSPS to capture transient faults in real time (such as current mutations within 20μs).

Control and Processing Unit:
Equipped with an ARM Cortex-M7 processor (main frequency 200MHz), integrated with a hardware encryption engine (AES-256), and protection parameters are stored in anti-interference Flash chips (supporting 100,000 times of erasing and writing); the control algorithm is optimized to dual-loop PID + fuzzy logic, with a dynamic response time ≤5ms (traditional PI control requires 15ms).

Execution and Drive Unit:
Adopts third-generation SiC MOSFET power devices, with switching losses reduced by 30% and the switching frequency increased to 100kHz (traditional IGBT is 20kHz). Together with the LLC resonance topology, it realizes zero-voltage switching (ZVS) to reduce electromagnetic interference (EMI).

Power Conversion and Energy Efficiency Optimization:
Adopts a three-level topology structure, and the input-stage EMI filter circuit is upgraded to a π-type multi-stage filter to suppress common-mode interference to -60dB (10-100MHz frequency band); high-frequency PWM modulation combined with soft switching technology reduces switching losses to 0.1W/A, and the efficiency curve is ≥95% in the 20%-100% load range.

Fault Diagnosis and Waveform Recording:
Built-in high-speed ADC (16-bit, 2MSPS), supporting waveform recording from 100ms before to 200ms after the fault (sampling rate 10kHz), and data is stored in a circular buffer, which can be exported through the Ethernet interface; the fault location accuracy reaches 1/100 of the phase voltage/current cycle (i.e., 0.02ms), meeting the IEEE 1588 clock synchronization requirements (accuracy ±1μs).

Power Grid and Equipment Interaction:
Supports the IEC 61850-9-2LE sampled value transmission protocol to interact with the substation automation system (SAS) in real time for protection status; has a load prediction function, which learns through historical data (such as the current curve in the past 24 hours) and adjusts the output power in advance to avoid overload.

Preventive Maintenance Mechanism:
Monitors the mechanical stress during module operation through a vibration sensor (range ±50g), and uses machine learning algorithms to predict the capacitor life (error ≤5%) and fan wear status in combination with parameters such as temperature and current. When the remaining life is <10%, it triggers an early warning (such as the touch screen displaying "Fan needs to be replaced").