Scope of application
● Compatible with the integrated needs of primary and secondary remote 5, 4, 3, 2, and standard 2 remote types, flexibly meeting off-site reclosing switches, line segmentation, line connection, user boundary scenarios, etc.;
● High-precision, wide-range sampling, optional electromagnetic transformer and electronic sensor, meeting metrology, measurement, and protection requirements, achieving a high accuracy of 128 points in compliance with Comtrade 1999 standards;
● For low-current single-phase ground faults, transient algorithms are used, with on-site disconnection, wire selection, and reclosing functions for grounding faults, and section selection based on centralized feeder automation;
● Deepen local feeder line automation applications, compatible with recloser voltage-time, voltage-current-time, and adaptive comprehensive;
● Connected to the line loss metering module, forwarding forward and reverse active power, four-quadrant reactive power, and other electrical energy data, uploading daily frozen energy files and power reverse energy freeze value files, enabling simultaneous line division and line loss systems, improving management refinement;
● Communication encryption: built-in State Grid professional security chip to protect communication channels, authenticate identities, and encrypt business data;
● Extended communication protocols, equipped with unified remote transmission parameter configuration for State Grid, remote control for recording, logging, wave recording, electricity consumption, and other file uploads;
● Meets the requirements of the State Grid Distribution Equipment Quality Control System: type testing, professional testing of distribution terminals, professional testing of primary and secondary integration, pre-delivery sample submission, full inspection upon arrival, on-site joint commissioning, and operational evaluation.
Product Overview
Powerful hardware and software platforms
The device adopts digital signal processing technology, high-speed industrial network communication technology, embedded industrial chipsets, and a multitasking real-time operating system. It offers strong stability, high reliability, good real-time performance, wide environmental compatibility, and powerful functions, meeting the power system's requirements for reliability and real-time performance.
The device uses high-precision 16-bit A/D, with current and voltage measurement accuracy reaching 0.2 grade, and power measurement accuracy up to 0.5 class.
Strong anti-interference, no adjustment required, easy maintenance
● The device adopts multi-level isolation and excellent shielding measures, with comprehensive anti-interference measures considered in everything from chassis to PCB design and component selection; Panel assembly requires no external anti-interference measures, simplifying design and operation/maintenance.
● The entire machine has no adjustable components; high-precision, highly stable industrial-grade components are selected to avoid deviations caused by environmental changes or long-term operation.
● Comprehensive self-check function, with detailed log records for all types of device abnormalities and uploadable to the main station.
● Built-in temperature measurement system for effective monitoring of the internal environmental status of the device.
● Passed 12 national-level EMC tests in electromagnetic compatibility chambers, including lightning surges, electromagnetic radiation, and transient interference.
Information security and reliability
● Equipped with a built-in State Grid professional security chip to achieve communication channel protection, identity authentication, and business data encryption.
● Comprehensive maintenance permission management; device maintenance operations require permission authentication.
Maintenance tools are easy to use
● Device maintenance tool software provides three major configuration functions: device channel configuration, set parameter settings, and forwarding point table configuration. Through these three configuration functions, various engineering applications can be configured without program modification,
This greatly improves the reliability of the device.
● The tools are highly user-friendly, making it easy to assist on-site operation with remote signal and telemetry viewing, remote control output, microsecond accurate device logs, GPRS module configuration, IEC101 and IEC104 specification testing, and more.
High-resolution user-friendly human-machine interface (optional)
● 128×64 diagram format with a fully Chinese display interface, user-friendly and rich content.
Basic functions
| Function | Description |
| Device parameters | Appearance type: hood or box type |
| Operating voltage: AC220V | |
| Operating voltage: permanent magnet: DC220V, spring: DC24V | |
| Rated voltage: Line voltage: AC100V, zero-sequence voltage: AC6.5V | |
| Rated current: 5A or 1A | |
| Data transmission | Communication interfaces: RS232 ≥ 1, RS485 ≥ 1, Ethernet ≥ 1 Communication protocols: IEC60870-5-101, IEC60870-5-104, supports parameter configuration and file upload expansion functions |
| When the master station communication is abnormal, the distribution terminal stores the unsent TCOS (COS with time mark) information and promptly transmits it to the master station when communication is restored; When a new link is established at the distribution terminal, it does not send historical TCOS information. Supports single-point, dual-point, and merged remote signaling remote signaling, supports remote signal position priority transmission , and can be configured for telemetry dead zone fault detection and over-limit alarm for each telemetry point | |
| Historical data storage | Supports multiple master stations, allowing only one master station to receive remote control commands at one time and loop 1,024 TCOS event records, with file transfer methods available for upload. |
| Fixed-point records can be stored looped for 31 days, uploaded via file transfer, and 96 fixed-point data records are generated at equal intervals each day | |
| Value records stored loop for 31 days can be uploaded via file transfer. Each value record generates one remote control operation record with 30 loops stored per day, and can be sent via file transfer | |
| Forwards and uploads the daily frozen energy files generated by the module, as well as the frozen value files of power reverse electrical energy | |
| Fault recording | Recorded wave data is stored in 64 loops and can be uploaded via file transfer to the master station . Recording wave startup conditions include overcurrent fault, line voltage loss, zero-sequence voltage, zero-sequence current abrupt changes, etc. The recording content can be set individually or in combination to include waveform data for the 4 cycles before the fault occurrence and the 8 cycles after the fault occurrence time, with a recording number of 128 points per cycle. The recording data packet includes voltage, current, and switch position; The recording file format meeting the 12 loops follows the definition in the Comtrade 1999 standard: CFG (configuration file, ASCII text) and DAT (data file, binary format). |
| Relay protection | Quick break, overcurrent, overload, zero-sequence overcurrent, triple reclosing, current cut-off lock, and anti-inrush misoperation fault handling functions for different neutral point grounding methods. Fault events include fault remote signaling and adaptive local feeder voltage and current values at the time of fault occurrence, voltage-time-based local feeder automation, voltage-current time-based local feeder automation, voltage-current time-based local feeder automation , and PT voltage detection with fault indication manual reset, automatic reset, and remote master station reset. It can automatically reset after normal power supply is restored at the set time or line, and can also automatically select reset mode based on fault nature (instantaneous or permanent). |
| Information security | Integrated security chip supports X.509 digital certificate resolution, SM1 data encryption and decryption, SM2 algorithm signature and authentication functions, SM2 algorithm public-private key pair generation, message authentication, MAC calculation and verification functions, monitoring the entire chip's operating status , requiring permission authentication to perform device maintenance |
| Maintenance functions | Three Remote Hardware Channel Configuration Local and Remote Setting Modification Three Remote Communication Point Table Configuration Remote Signaling and Telemetry Status Viewing, Remote Control Output Terminal Operating Parameters Local and Remote Access and Configuration Functions. Configuration parameters include zero threshold value (zero drift), variation threshold (dead zone), heavy overload alarm limit, short-circuit and grounding fault action parameters, and local and remote access functions. Retrieval parameters include terminal type, factory model, and terminal ID number , embedded system name and version number, hardware version number, software verification code, communication parameters, and secondary transformation ratio programs are remotely updated. Remote download logs for security keys include operation records, error logs, remote messaging records, SOE records, GPRS records, and can store up to 1,000 IEC101 and IEC104 communication protocol monitoring and resolution . Self-diagnosis and self-recovery are performed for functional boards and key chips. In case of abnormality, alarm information is reported. In case of software abnormality, it automatically resets with clear local status indicators such as line faults, terminal status, and communication status, which can be seen under the line fault and terminal status sticks |
| DC voltage | Lane 2, level 0.2 |
| Temperature | Channel 1: Real-time response to the internal environmental status of the device |
| At that time | GPS B-code timing synchronization, SNTP network timing alignment, protocol timing alignment |
| Power supply | Power supply: AC220V, dual-channel self-adjusting |
| Backup power: supercapacitor, seamless switching | |
| Operating mechanism | Spring operating mechanisms, electromagnetic operating mechanisms, permanent magnet operating mechanisms |
