GE 889-EP5P5G5HNNAANGMSFB3ASNBN - Generator Protection Relay Module

Protection Functions: It is equipped with protection functions such as generator unbalance, generator differential protection, overexcitation, loss of excitation, third-harmonic neutral point undervoltage, overfrequency, and underfrequency. It can also provide protection like phase directional overcurrent, negative-sequence overvoltage, and phase overvoltage, which can effectively respond to various fault conditions and ensure the safe operation of the generator.

Monitoring Functions: It can monitor the operating parameters of the generator, such as frequency, voltage, and current. Some models can also monitor parameters like generator excitation current and vibration through optional modules. Combined with the waveform capture function, waveform data can be stored and read via software for fault diagnosis.

Control Functions: Through programmable logic, it realizes the control of generator-related circuits or equipment, ensuring the generator operates stably under normal conditions and can promptly cut off relevant circuits in case of faults to prevent the expansion of faults.

Signal Acquisition and Processing: Electromagnetic transformers are used to reduce the input analog signals from source instrument transformers. The signals pass through an 11.5kHz low-pass analog anti-aliasing filter and are simultaneously collected by a sample-and-hold buffer to ensure no phase shift. Then, a 16-bit A/D converter converts the signals into digital values, which are transmitted to the CPU for analysis.

Frequency Measurement: It is realized by measuring the time between zero-crossing points of the composite signal of three-phase bus voltage, line voltage, or three-phase current. The signal passes through a low-pass filter to prevent false zero-crossing. The sampling rate of current and voltage is set according to the measured frequency to improve the accuracy of the Discrete Fourier Transform (DFT) algorithm.

Dual-Processor Control: The Freescale MPC5125 32-bit microprocessor is used to measure all analog signals and digital inputs, and control all output relays; the Freescale MPC8358 32-bit microprocessor controls all advanced Ethernet communication protocols. They work together to realize various functions.

Superior Protection Performance: The enhanced generator protection algorithm provides sub-cycle differential protection, which can clear faults faster and reduce generator damage. It has advanced voltage and current protection functions, as well as additional generator-transformer overall differential protection as a backup, ensuring comprehensive and reliable protection.

Strong Communication Capability: It supports communication protocols such as IEC 61850 edition 2 and is equipped with dual communication ports, enabling simplified integration of equipment and zero-delay communication, facilitating data interaction and remote monitoring with other systems.

Flexible Configuration: It has widely customizable programmable logic and flexible configuration capabilities, which can be set according to different application scenarios and user needs to adapt to various working conditions.

Convenient Maintenance: The drawer-type design facilitates testing, debugging, and maintenance, which can improve the process uptime. Optional Wi-Fi function reduces system configuration workload and facilitates safe relay programming and diagnostic retrieval.

User-Friendly Human-Machine Interaction: It is equipped with a large full-color graphic control panel (GCP) that can clearly display key statuses and measured values. It can also provide up to 6 pages of configurable dynamic one-line diagrams for comprehensive switchgear control.

Industrial Field: It can be applied in various industrial enterprises, such as steel plants, cement plants, and chemical plants, to protect the internal generators and related transformers, ensuring stable power supply and equipment safety during industrial production.

Public Utility Field: It is suitable for public utility places such as power plants and substations to protect and monitor generators and transformers, ensuring the safe and stable operation of the power grid and improving the reliability and quality of power supply.

Renewable Energy Field: In renewable energy projects such as wind farms and solar power stations, it can be used to protect generators and transformers, ensuring the normal operation of renewable energy power generation equipment and stable power output, and realizing safe interconnection and efficient operation.