GE UR8LH Microcomputer relay protection measurement and control device

GE UR8LH Microcomputer relay protection measurement and control device

Specific Parameters​

Electrical Parameters​

Operating Power Supply Wide voltage input range 85VAC-265VAC or 110VDC-220VDC, supporting dual-channel redundant power supply, rated operating voltage 220VAC/DC​

Operating Current Typical operating current ≤5A (AC), ≤0.9A (DC); maximum operating current ≤8A (AC), ≤1.3A (DC)​

AC Sampling 24 high-precision analog input channels, supporting CT input (5A/1A) and VT input (100V/√3), sampling accuracy ±0.1%FS​

Synchronous Sampling Supporting IEC 61850-9-2 LE/E2 sampling, sampling rate 4000Hz, inter-channel synchronization error ≤1μs, supporting IEEE C37.118 synchronized phasor measurement​

Protection Operation Time Differential protection operation time ≤12ms, distance protection Stage Ⅰ operation time ≤15ms, overcurrent protection operation time ≤20ms​

Digital Input 64 programmable digital input channels, supporting dry contact/wet contact signals, operating voltage 24VDC±10%, debounce time configurable (1ms-100ms)​

Digital Output 32 high-power relay outputs, contact rating 250VAC/10A, 30VDC/10A, supporting trip, close, signal alarm and linkage control outputs​

Communication Interfaces 4 Gigabit Ethernet ports (supporting link aggregation), 2 RS-485 serial ports, 1 USB 3.0 configuration port, 1 optical Ethernet port (optional)​

Fault Recording Built-in large-capacity fault recording function, recording length ≥4000 cycles, sampling rate 4000Hz, supporting COMTRADE 1999 format export, capable of storing ≥100 recording data​

Certification Standards Compliant with GB/T 14598.3, GB/T 14598.10, IEC 60255-22-1, IEC 60255-22-2, IEC 61850-1/2/3/4/5/6/7/8/9, IEEE C37.118 standards​

Mechanical Parameters​

Overall Dimensions 482.6mm×320mm×280mm (W×D×H), standard 19-inch rack-mounted dimensions, occupying 6U height​

Weight Approximately 15kg, all-metal plug-in structure with high mechanical strength, convenient for maintenance​

Mounting Method 19-inch standard cabinet rack-mounted installation, front and rear double fixation, adapting to installation requirements of medium and high-voltage substation control rooms and industrial power distribution rooms​

Housing Material Industrial-grade high-strength cold-rolled steel plate housing with electrostatic spraying surface treatment, featuring Class Ⅰ electromagnetic shielding performance​

Connection Method Back plug-in terminal block + aviation connector connection (power supply, analog quantity, digital quantity, communication) with screw-fastened wiring; front configuration of operation panel and interfaces​

Protection Rating IP54, suitable for indoor industrial environments, dustproof, splashproof and protection against foreign object intrusion​

Status Indication Equipped with 12-inch color touch screen (resolution 1280×800), Power (green), Run (yellow), Protection Action (red), Alarm (orange), Communication (blue), Synchronization (cyan) LED indicators​

Environmental Parameters​

Operating Temperature -25℃ to 75℃, no performance derating over the entire temperature range​

Storage Temperature -40℃ to 85℃, meeting extreme storage and transportation requirements​

Relative Humidity 5% to 95% (short-term condensation allowed), adapting to high-humidity and high-altitude (≤4500m) scenarios​

Vibration Resistance Complies with IEC 60068-2-6 standard, 3g acceleration at 5Hz-150Hz frequency range​

Shock Resistance Complies with IEC 60068-2-27 standard, 20g acceleration (duration 11ms)​

EMC Compliance Complies with IEC 61000-4-2 (±15kV contact discharge), IEC 61000-4-3 (±20kV radiated immunity), IEC 61000-4-6 (20V/m common mode interference) standards​

Product Performance​

Extremely high integration, 24 analog inputs + 64 digital inputs covering protection needs of various equipment without additional expansion modules​

Excellent measurement accuracy, ±0.1%FS sampling accuracy + synchronized phasor measurement function providing accurate data for dispatching and fault analysis​

Rich protection logic, integrating dedicated protection algorithms for lines, transformers, buses and other equipment adapting to medium and high-voltage full-scenario applications​

Fast action response, millisecond-level protection operation time quickly isolating faults and reducing system losses​

Strong communication capability, multi-port Gigabit Ethernet + optional optical port supporting IEC 61850 full protocol adapting to smart substation networking​

Flexible and convenient expansion, plug-in structure supporting function module upgrade, logic programming supporting custom protection strategies​

Intelligent operation and maintenance, large-size touch screen + remote operation and maintenance tools supporting setting management, recording analysis and status monitoring​

Stable and reliable operation, dual-channel power redundancy + hot backup of key components, Mean Time Between Failures (MTBF) ≥2,000,000 hours​