GE 369-H1-R-M-F-E-H-E Generator Schutzrelais

• überstromschutz: Unterstützt zwei Betriebscharakteristiken - inverse Zeitcharakteristik (IEC 60255-3) und feste Zeitcharakteristik. Der Phasenstromschutzbereich betr?gt 0,1 - 10I? (wobei I? der Nennstrom des Generators ist), der die überstromcharakteristiken des Generators unter verschiedenen Betriebsbedingungen wie Anlauf, Netzanschluss und Lastbetrieb genau abgleichen kann und so verhindert, dass die Motorenwicklungen durch überstrom verbrannt werden.

• Kurzschlussschutz: Der Momentanbetriebsstrom kann auf 2 - 20I? eingestellt werden, mit einer Betriebszeit von <50ms. It can quickly cut off serious faults such as three-phase short circuits and two-phase short circuits, preventing the fault from spreading to the generator's stator and rotor.

• Voltage Protection: Integrates overvoltage (1.05-1.5U?) and undervoltage (0.5-0.95U?) protection. The operating delay is adjustable within 0.1-60s, adapting to grid voltage fluctuations (such as lightning strikes and sudden load changes). It prevents the generator insulation from being broken down by overvoltage and avoids asynchronous operation caused by undervoltage.

• Frequency Protection: Covers a wide frequency range of 45-55Hz. Underfrequency (45-49.5Hz) protection prevents generator stalling, while overfrequency (50.5-55Hz) protection avoids damage caused by overspeed. The operating delay can be flexibly configured according to the grid's frequency regulation requirements.

• Ground Fault Protection: Supports stator ground protection (covering 95% of the stator winding, with a ground current of 0.1-10A) and rotor ground protection (dual ground protection, with a ground current of 0.1-5A). It adopts injected signal detection technology, achieving a ground fault identification accuracy of 99.9%, and prevents ground short circuits caused by the aging of generator winding insulation.

• Overload Thermal Protection: Built-in generator thermal model (complying with IEEE C37.218 standard), which calculates the thermal accumulation of the stator and rotor in real time, simulating the motor's heating characteristics. An early warning is triggered when the load reaches 5%-10% before overload, and the relay operates according to the thermal accumulation when overload occurs, avoiding cumulative overheating caused by frequent startup and shutdown.

• Reverse Power Protection: The operating power range is 0.5%-50% P? (P? is the generator's rated power). It is used to prevent the generator from operating as a motor (e.g., when the grid loses voltage), avoiding damage to turbine blades. The operating delay is adjustable within 0.5-60s, compatible with the power regulation requirements of grid-connected power generation systems.

Supports switching between 16 groups of protection setting zones. The settings can be quickly switched via the upper computer or local buttons, adapting to different generator scenarios such as "single-machine operation," "grid-connected operation," and "maintenance and commissioning." No reprogramming is required, which greatly improves operation and maintenance efficiency.

• Multi-Parameter Accurate Acquisition: Equipped with a 24-bit high-precision ADC (Analog-to-Digital Converter) with a sampling frequency of 1kHz. It can collect real-time parameters including three-phase current (accuracy: ±0.2% FS), three-phase voltage (accuracy: ±0.2% FS), power factor, active/reactive power (accuracy: ±0.5% FS), and RTD temperature (±0.5℃), fully covering the electrical and thermal operating conditions of the generator.

• RTD Temperature Monitoring: Supports 8-channel 3-wire RTD inputs, compatible with various thermal resistors such as 100Ω platinum and 100Ω nickel. It can be directly connected to temperature sensors of key components such as stator windings, bearings, and iron cores, monitoring the temperature rise of key components in real time and providing early warnings for potential issues such as insulation aging and bearing wear.

• Event and Waveform Recording: Built-in 512 event records (including timestamps, fault types, and operating values), supporting waveform recording for 10s before and 5s after a fault (sampling rate: 1kHz). Waveform data can be exported via USB or communication interfaces for fault tracing and analysis, reducing accident investigation time.

• Health Condition Assessment: By continuously monitoring parameters such as current unbalance (0-50%), voltage harmonics (total harmonic distortion rate THD <10%), and power fluctuations, combined with built-in algorithms, it generates a generator health score (0-100 points), intuitively reflecting the equipment's operating status and helping to shift from "fault repair" to "predictive maintenance."

• Hardware Redundancy and Fault-Tolerant Design: The power module supports a wide voltage input of 24VDC/110VAC/220VAC (50-300VDC/40-265VAC) and is equipped with a 1+1 redundant power interface. When the main power supply fails, the backup power supply switches within <10ms, ensuring reliable power supply for the device itself. The CPU adopts a dual-core architecture, with core computing and I/O control independent of each other. A single-core fault does not affect the protection function, and the MTBF (Mean Time Between Failures) is >800,000 hours (under 40℃ working condition).

• Harsh Environment Adaptability: Uses wide-temperature components (-40℃~+70℃). The PCB board is coated with conformal coating (complying with IPC-CC-830 Class B standard), featuring moisture-proof, salt spray-proof, and mildew-proof capabilities. It passes the ASTM B117 salt spray test (≥96 hours). Its electromagnetic compatibility complies with EN 61000-6-2 (industrial environment immunity) and EN 61000-6-3 (emission, Class B) standards. In scenarios with strong electromagnetic interference such as high-voltage equipment startup/shutdown and frequency converter operation, the accuracy of protection actions remains unaffected.

• Safety Certification and Compliance: Certified by IEC 61850 Ed.2 (substation communication standard) and IEEE C37.238 (generator protection relay standard), and complies with domestic standards such as GB/T 14598.3 Measuring Relays and Protection Devices - Part 3: Radiated Electromagnetic Field Interference Test. It can be directly applied to safety-critical systems in domestic industries such as power and petrochemicals, meeting the requirements of SIL 2 safety integrity level.

• Multi-Protocol Communication Support: Integrates 1 RS485 port (supporting Modbus RTU/ASCII and IEC 60870-5-103 protocols) and 1 Ethernet port (supporting IEC 61850 MMS/GOOSE and Modbus TCP protocols). It can be seamlessly connected to DCS, SCADA systems, or grid dispatching platforms, realizing remote configuration of protection settings, real-time upload of operating data, and remote push of fault alarms. It supports the "four remote" functions (remote measurement, remote signaling, remote control, and remote adjustment).

• Local and Remote Control: Equipped with an LCD display panel (128×64 pixels, with backlight support) and 4 operation buttons, supporting local manual reset, setting modification, and protection enabling/disabling. At the same time, it supports remote control of generator switching on/off via communication interfaces (cooperating with circuit breaker actuators), adapting to the remote operation and maintenance needs of unattended power stations.

• I/O Interface Expandability: Has 6 optically isolated digital inputs (DI, compatible with dry contacts/wet contacts), which can be connected to generator status signals (such as circuit breaker position and speed signals); and 8 relay digital outputs (DO, 5A/250V AC), which can directly drive executive components such as circuit breaker trip coils, alarm indicators, and sound and light alarms, without the need for additional intermediate relays, simplifying wiring.

• Intuitive Status Indication: The panel is equipped with 16 LED indicators, corresponding to statuses such as "power normal," "protection action," "alarm," and "communication normal." When a fault occurs, the red light flashes and displays a fault code (e.g., "OC-1" indicates overcurrent stage I action), allowing on-site personnel to initially determine the fault type within 30 seconds.

• Online Debugging and Calibration: Compatible with GE Proficy Machine Edition debugging software, enabling online calibration (of parameters such as current, voltage, and temperature) and protection logic simulation testing via USB or Ethernet, without power failure, reducing generator downtime for debugging.

• Self-Inspection and Fault Self-Diagnosis: Built-in hardware self-inspection (CPU, memory, I/O modules) and software self-inspection (protection algorithms, communication links) functions. When a fault occurs, it automatically records the fault code and uploads it, and switches to the "fail-safe mode" (maintaining key protection functions effective) to avoid protection failure caused by the device's own fault.

• Thermal/Hydropower Generation: Used as the main protection for 300MW-1000MW steam turbines and hydro-generators. Stator and rotor ground protection prevent winding insulation faults; reverse power protection avoids turbine dragging; frequency protection cooperates with the grid's AGC (Automatic Generation Control) system to ensure stable grid connection of the generator. At the same time, it is connected to the power plant's SIS system to upload real-time operating data, helping to optimize unit energy efficiency.

• Distributed Energy Generation: Compatible with energy storage supporting generators (such as gas turbine generators) in wind farms and photovoltaic power plants. The wide-temperature design adapts to outdoor high-altitude and low-temperature environments; overvoltage/undervoltage protection copes with grid fluctuations during new energy grid connection; ground fault protection prevents insulation damage of generators in humid and dusty environments, ensuring reliable grid connection of distributed power sources.

• Self-Owned Power Plants in Oil and Gas Fields: Used for self-owned generators (such as diesel generators and gas generators) in oil fields and gas fields, adapting to high-temperature and high-salt spray environments in the field. Short-circuit protection quickly cuts off power supply faults in drilling platforms and gathering stations; overload thermal protection prevents the generator from overheating under high loads (e.g., driving oil pumps and compressors), ensuring continuous power supply for oil and gas production.

• Chemical Park Generators: Compatible with emergency generators in chemical parks (ensuring power supply for reactors and explosion-proof equipment). The protection relay has passed ATEX explosion-proof certification (for Zone 2 hazardous areas); overcurrent and short-circuit protection can be interlocked with the chemical DCS system. When a fault occurs, non-critical loads are automatically cut off, giving priority to ensuring power supply for equipment in explosion-proof areas, in line with chemical industry safety regulations.

• Rolling Mill Generators in Iron and Steel Plants: Used for the protection of synchronous generators for main drives of rolling mills. Current protection adapts to the impact load of rolling mills (e.g., current fluctuations when rolling steel plates of different thicknesses); voltage protection stabilizes the generator terminal voltage, ensuring rolling mill speed and rolling accuracy; RTD temperature monitoring real-time monitors the stator winding temperature, providing early warnings of overload risks and reducing unplanned shutdowns of rolling mills (each hour of shutdown causes losses exceeding 100,000 yuan).

• Self-Owned Power Stations in Mines: Compatible with diesel generators in underground mines and open-pit mines. Wide voltage input is compatible with the unstable power grid in mines; ground fault protection prevents motor grounding in humid environments; frequency protection avoids generator stalling due to sudden load changes (e.z. B. Brecheranlauf), um die Stromversorgung für Schlüsselger?te wie Grubenaufzüge und Lüfter sicherzustellen.