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　　MIFIIPI55E10HI00 Other Names:

　　Current Protection Device MIFIIPI55E10HI00

　　MIFIIPI55E10HI00 Multilin MIFII Feeder Relay

　　Multi-line Relay MIFIIPI55E10HI00

　　MIFIIPI55E10HI00 is a MIF II series digital feeder protection relay manufactured by General Electric (GE). It is an economical, high-performance device widely used in the protection of distribution feeders, transformers, busbars, generators, and large motors, supporting backup protection functions.

　　Core Positioning and Functions

　　Series Classification: Belongs to the GE Multilin M II series of economical high-function digital relays, primarily for distribution feeder protection, while also compatible with backup protection for transformers, busbars, generators, and large motors.

　　Core Functions:

　　Protection Functions: Phase/ground delay overcurrent (51P/51G), instantaneous overcurrent (50P/50G), thermal image protection, circuit breaker fault tripping, cold load pickup, four-phase automatic recloser.

　　Overcurrent Protection: Phase delay overcurrent (51P), phase instantaneous overcurrent (50P1/50P2), ground delay overcurrent (51G), ground instantaneous overcurrent (50G1/50G2).

　　Thermal Image Protection: Thermal imaging protection based on load current to prevent overheating damage.

　　Reclosing Function: Four-phase automatic recloser, supporting cold load pickup and circuit breaker fault tripping configurations.

　　Circuit Breaker Control: Integrated circuit breaker opening/closing control, supporting configurable I/O (6 outputs: trip, service, auxiliary).

　　Logic Configuration: Supports programmable logic, curve setting, and customizable LED indicators.

　　Control Functions: Integrated circuit breaker opening/closing control, reclosing logic, and configurable I/O (6 outputs: trip, service, auxiliary).

　　Communication and Interfaces:

　　Serial Communication: Front-end RS232 and rear-end RS485 ports, supporting ModBus RTU protocol (rate 19,200 bps).

　　HMI: 2×16 character LCD display, 6 LED indicators (4 configurable colors/functions).

　　Software Support: Compatible with EnerVista setup software, supporting firmware upgrades, event logging, waveform capture, and multi-setup group management.

　　Expandability:

　　Programmability: Supports user-defined curves, logic configurations, and I/O mapping.

　　Dual Setup Groups: Allows switching between two independent configurations to adapt to different operating scenarios.

　　Password Protection: Local operation password verification to prevent unauthorized modification.

　　Technical Parameters

　　Electrical Specifications:

　　Rated Voltage: 250VAC; Rated Current: 10A.

　　Input Voltage Range: 12-48VDC; Output: 5VDC, maximum 10A, efficiency >90%.

　　Number of Contacts: 10, supports various configurations (e.g., circuit breaker control, signal feedback).

　　Physical Characteristics:

　　Dimensions: 170mm × 105mm × 32mm; Weight: Approx. 120g.

　　Operating Environment: -40°C to 70°C (operation/storage), humidity 5%-95% (non-condensing).

　　Typical Application Scenarios

　　Industrial Power Distribution: Factory feeder, motor protection, busbar protection.

　　Commercial Buildings: Building incoming/outgoing line protection, intelligent power distribution automation (in conjunction with SCADA systems).

　　Renewable Energy: Photovoltaic and wind power grid connection point protection to ensure stable grid connection.

　　Power Systems: Transformer and generator backup protection, circuit breaker fault monitoring.

　　Advantages and Highlights:

　　Balance between economy and high reliability, suitable for small and medium-sized distribution networks.

　　Flexible configuration capabilities (e.g., time-current curve selection: IAC, EPTAR-C, etc.).

　　Integrated reclosing and cold load functions improve power supply continuity.

　　Compatible with industrial communication protocols, easily integrated into SCADA or DCS systems.

　　Technical Highlights:

　　High-performance processor: Utilizes a 32-bit RISC chip, providing strong data processing capabilities and fast response speed.

　　Flexible configuration: Supports multiple protection curves (IEC/ANSI inverse time, IAC curves, etc.), adapting to different power grid standards.

　　High reliability: Type-test certified, possessing electromagnetic interference resistance and wide-temperature operating capabilities.

　　Ease of use: Plug-and-play software, intuitive LCD interface, remote diagnostic functions, reducing operation and maintenance costs.

　　Certifications and Standards:

　　Complies with the electrical safety and performance requirements of the International Electrotechnical Commission (IEC) and American Standards (ANSI).

　　Type testing and product certification ensure stable operation in harsh environments.

　　Precautions

　　Installation and Maintenance: Follow GE's official wiring specifications to ensure correct connections for power supply, current transformer inputs, and communication links; regularly check settings and firmware versions using EnerVista software.

　　Compatibility: Confirm compatibility with existing systems (such as PLCs and DCS) to avoid memory mapping conflicts.

　　Summary: The MIFIIPI55E10HI00 is a high-performance digital relay designed by GE for power protection needs. With its comprehensive protection functions, flexible configuration options, powerful communication capabilities, and high reliability, it is an ideal choice for feeder protection in industrial, commercial, and renewable energy sectors.

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