Technical Description
    The THLWX-E1 lab system is elaborately designed for "Power System Protective Relaying", "Electric Power Engineering", "Electric Power Automation", and "Power System Microprocessor-based Protection", etc., which addresses the requirements of colleges and vocational school. It combines multifunctions such as protection, measuring, control, monitoring, and communication, facilitating students mastering the protection connection, commissioning method, and principle of conventional relaying protection and microprocessor-based protection. Additionally, RS-485/Modbus-RTU interface and computer monitoring software are available for users.
    Safety has been paramount during the development of this equipment and every effort has been made to protect both the user and instruments:
      3-phase 4-wire power supply input with floated ground design;
      Main power, being controlled by key switch and protected by illuminating fuse;
      Power to control panel, being controlled by contactor, STOR/START button;
      Available voltage type leakage protection and current type leakage protection for control panel;
      Overcurrent protection for both sides of 3-phase autotransformer;
      Timer & alarm recorder.
Specification
    • Power supply: 3-phase 380V±10％ 50Hz    
    • Environment temperature: －10℃～＋40℃
    • Power capacity: ＜1.5kVA     
    • Dimensions: 184×72×168 cm
Experiments
    (1) System experiments
      • Simulation of system operating modes
      • Simulation of system short-circuit faults
      • Static test for protection device
      • Basic test for microprocessor-based device
      • Microprocessor-based definite time instantaneous overcorrection protection
      • Microprocessor-based instantaneous overcurrent protection
      • Microprocessor-based time delay instantaneous overcurrent protection
      • Coordination of overcurrent protection zones
      • Effects of operating mode on sensitivity & sensitivity test
      • Current & voltage interlock protection
      • Inverse time overcurrent protection
      • Coordination of overcurrent protective zone & pre-acceleration of auto-reclosure
      • Coordination of overcurrent protective zone & post-acceleration of auto-reclosure
      • Research on others transmission line protections
    (2) Electromagnetic relay
      • Electromagnetic current relays and voltage relays
      • Electromagnetic time relays
      • Intermediate relays
      • JX-21A/T series signal relay
      • Overcurrent protection for 6-10kV lines
      • Instantaneous overcurrent protection
      • Two-zone overcurrent protection
      • Current latching & instantaneous undervoltage protection
      • Generator overvoltage protection
    (3) Self-designing experiment
      • Coordination of current & voltage interlock protection and overcurrent protection
      • Coordination of current & voltage interlock protection, overcurrent protection and auto reclosure
      • Coordination of inverse time and overcurrent protection
      • Coordination of inverse time, overcurrent protection and auto reclosure
      • Coordination of current & voltage interlock protection and pre-acceleration of auto reclosure
      • Coordination of current & voltage interlock protection and post-acceleration of auto reclosure
    (4) SCADA (short for supervisory control and data acquisition)
      • Telemetry, telecommand, and teleindication.