1. Overview

2. Specifications

3. Product Features

• Multi-Function Integration: This relay integrates comprehensive protection and control functions for transformers, generators, motors, and feeders, which greatly simplifies system wiring and maintenance operations. The all-in-one design eliminates the need for multiple standalone devices, optimizing the overall layout of power system equipment and reducing operational complexity.
• Advanced Communication Capabilities: In addition to supporting traditional RS485 protocols, it is equipped with an integrated Ethernet communication module that is fully compliant with the IEC 61850 standard. This enables seamless access to smart grid infrastructures and SCADA systems, facilitating real-time data transmission, remote monitoring, and unified management of power equipment.
• High-Precision Measurement: Fitted with a high-performance signal processing unit, the relay delivers exceptional measurement accuracy, with current/voltage accuracy of ±0.5% and power accuracy of ±1%. This high precision supports accurate fault location, rapid fault identification, and targeted troubleshooting, minimizing power outage time and equipment damage.
• Modular Design: Adopting a modular hardware architecture, the device allows for quick on-site component replacement and system upgrades. This design not only shortens maintenance and upgrade cycles but also reduces the total cost of ownership for power system operators.

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4. Structure and Components

• Main Control Module: Built with a high-performance processor, responsible for core operations including signal analysis, fault judgment, and decision-making control. It ensures fast response to power system anomalies and executes reliable protection actions in a timely manner.
• Communication Module: Equipped with dual RS485 ports (supporting Modbus RTU/DNP3.0) and an Ethernet interface compliant with IEC 61850, building a stable and efficient communication channel for data interaction and remote control.
• Input/Output Panel: Provides abundant interfaces for analog signals (RTD, VT) and digital signals (relay, switch value), meeting the access needs of various power monitoring and control equipment, and ensuring flexible system expansion.
• Display and Operation Panel: Features a 40-character LCD screen and numeric keypad, supporting local equipment monitoring, parameter setting, and manual operation, enabling convenient on-site commissioning and daily management.

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5. Application Areas

• Transformer Protection and Management: Suitable for overload, differential, and inrush current protection of oil-immersed transformers, dry-type transformers, and autotransformers, safeguarding the stable operation of core power transformation equipment.
• Generator Protection: Supports overcurrent, overvoltage, field loss, and other critical protection functions for synchronous generators and induction generators, preventing equipment failures and ensuring stable power generation.
• Motor and Feeder Management: Delivers comprehensive protection and monitoring for large-scale motors and high-voltage feeders, effectively avoiding equipment burnout and power line faults, and ensuring the reliability of power transmission and distribution.
• Distribution Network Automation: Leveraging the IEC 61850 interface, it is widely applied in smart substations and distribution automation systems, promoting the intelligent upgrading of distribution networks and improving the overall operational efficiency of power systems.

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6. Installation and Maintenance

• Installation Method: Supports standard 19-inch panel mounting, with a weight ranging from approximately 4.8 to 8.36 kilograms. It is compatible with cabinet mounting and rail mounting, adapting to diverse power equipment room layout requirements and simplifying installation construction.
• Maintenance Features: The modular design streamlines fault location and component replacement, significantly reducing on-site maintenance difficulty and time. Additionally, it supports remote parameter configuration and fault diagnosis, minimizing on-site maintenance workload and lowering operational and maintenance costs for power enterprises.