GE L90-W03-HKH-F8L-H6P-L6C-N6C-S6C-U6L-W7G/L90N03HKHF8LH6PL6CSCS6CU6LW7G belongs to the Multilin L90 series line current differential protection relays, which is a member of the general-purpose relay family. It is specifically designed for the protection of transmission lines and cables with different voltage levels and can operate reliably under complex power system conditions.
DATA SHEET
Differential Protection: Equipped with high-speed phase-separated current differential protection, suitable for monopolar and tripolar tripping scenarios, enabling quick fault clearing. The adaptive braking characteristic of the differential element maintains high sensitivity during internal faults and ensures safety during external faults.
Distance Protection: Provides high-speed, cost-effective five-zone quadrilateral or mho-type phase-to-phase and ground distance protection. Some models also feature 6-zone protection and sub-cycle performance, supporting various standard and customized pilot wire schemes to ensure rapid monopolar tripping.
Other Protections: Supports ground fault detection, in-zone transformer protection, short-line protection, etc. It can also protect and control circuits of feeders with tapped transformers.
Measurement and Monitoring: Built-in synchrophasor measurement unit, compliant with IEEE C37.118 (2011) and IEC 61850-90-5 standards. It eliminates the need for additional dedicated phasor measurement units and supports synchrophasor multicasting, which can reduce bandwidth and communication infrastructure costs.
Communication Capabilities
Equipped with 3 independent optical fiber or copper Ethernet ports, supporting 1-microsecond time synchronization via LAN and IEEE 1588, and enabling simultaneous dedicated network connections.
Compliant with advanced IEC 61850 ed.1 and ed.2 standards, with complete configuration via SCL files. It fully supports process buses (such as IEC 61850-9-2 LE, IEC 61850-9-2 hard optical fiber, etc.), ensuring interoperability between devices, optimizing device management, and reducing ownership costs. Supports routable GOOSE (R-GOOSE), facilitating more cost-effective communication architectures in wide-area applications.
Display and Control: It integrates a large full-color display, which can realize real-time visual monitoring and control of the protected bay through bay mimic diagrams, signal alarm functions and phasor graphical displays.
Electrical Characteristics: The AC withstand voltage is 260V continuously (relative to the neutral point), and 420V for 1 minute per hour (relative to the neutral point); the DC mA input impedance is 379Ω±10%.
Environmental Adaptability: The operating temperature range is -40°F to 140°F (approximately -40°C to 60°C), enabling it to adapt to various complex industrial environments.
Other Features: It is equipped with a built-in error detection system, which identifies erroneous data through 32-bit CRC check to prevent misoperation. It supports GPS time synchronization and can compensate for channel asymmetry issues up to 10ms on multiplexed channels. It can record the operation of internal components with timestamps, and graphically display ground phase distance elements at a rate of 64 samples per cycle, assisting in line fault analysis and facilitating troubleshooting of power systems.
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