FJY Feries Remote Terminal Unit

Introduction

FJY series remote terminal unit is based on distributed multi-CPU concept and AC sampling technology. FJY series remote terminal unit mainly includes FJY-2 distributed AC sampling RTU, FJY-3 distributed RTU and FJY-3N RTU based on the Ethernet.

FJY series RTU is suitable for 35kV-220kV substations, switch yard, power plant, and hydraulic power station as measurement and supervisory control system.

This device passed the ministry appraisal in 1992 and received the second-class of Power Ministry Technology Progress Award.

Functional Characteristics

• The system employs distributed modular structural design, flexible configuration and is easy to expand.
  
• AC sampling and DC sampling compatible design, AC sampling two-meter method and three-meter method selectable, the measurement algorithm includes 15th harmonics, and the hardware circuit can be automatically adjusted.
  
• Power supply adopts AC and DC non-interference switching, redundancy and balanced current technology.
• Communication network adopts main/backup redundancy, main/backup modules automatically switchover to satisfy unmanned high reliability requirements.
  
• Teleindication circuit supports two-level isolation. Advanced signal extraction algorithm assures real-time performance and accuracy of change of state and event.
  
• Enriched history database can record RTU running condition, switch event, and telecontrol operation. The records will not be lost while losing power. Perfect self-diagnostic function is convenient for local or remote maintenance.
  
• Telecontrol multiple interlocking with special output checking function to assure its validity.
  
• Support various communication interfaces and protocols such as RS232, RS422, RS485, CANBUS, fiber-optic,4F,SC1801, DNP3.0, IEC870-5-101, DL476, IEC870-5-104, and MODBUS, etc.
  
• Protocols of microprocessor-based relay protection, intelligent power-meter and other intelligent equipment can be selected from the panel.
  
• Anti lightning strike and anti transient interference design is suitable for severe working environment.
  
• Support GPS time hardware-synchronization to ensure clock synchronization across the network.
  
• LCD large screen(240128 lattice), menu mode, easy for operation monitoring and maintenance.

  Technical Parameters
  

• DC input
  Capacity up to 512 points
  Input 5V, 0~10mA, 4~20mA

• AC input
  Capacity 12 line/unit, can be extended to 96 lines
  AC value input 0~120V, 0~6A or 0~1A
  

• Digital input
  Capacity up to 512 points
  Input First level: optoelectronic isolation 24V/5mA; second level: optoelectronic isolation 110V,220VDC
  

• Digital output
  Capacity up to 384
  Output mode idle contact output, DC220V/110V,5A

• Analog output
  Capacity up to 32
  Output mode 5V; 0~10mA; 4~20mA
  

• Pulse input
  Capacity up to 512 points
  Input mode optoelectronic isolation, active/passive contact
  Output mode 32-bit binary coding
  

• CPU: 80C196, 80296, 80486
  

• Sampling precision: 0.5%
  

• Measuring precision
  Voltage, current 0.2%
  P, Q 0.5%
  Frequency 0.01Hz

• SOE resolution: 1ms

• Time synchronization: by superior dispatch center or with GPS (employ second pulse synchronization and serial port combined mode).

• Communication
  Rate 50~9600 Baud selectable
  Protocol Ministry issued CDT and IEC870-5-101,etc.
  Interface up to 5 RS232 synchronous/asynchronous ports, 3 RS232/RS422/RS485 asynchronous ports, 1 RS232 asynchronous port, 2 10M Ethernet

• Working environment
  Temperature -15~55
  Humidity <85%
  Barometric pressure 86~108kPa

• Power source
  AC220V20%, DC220V20% or 110V15%; AC and DC automatic switching; shunt balanced current
  
  Engineering Application
  
  Since this device was released in 1992, it has been applied in about 1500 substations and about 400 of them has become unmanned substations.