Overview：

The line protection measurement and control device is a complete set of line protection devices with current, voltage protection and three-phase reclosing as the basic configuration. It is suitable for the direction line protection and measurement and control in the non-direct grounding system or the resistance grounding system of the voltage level below 66kV, which can be installed in the switch cabinet or installed in the control room.

 Main function configuration：

• Three-stage directional over-current protection blocking by compound voltage. 

• Phase to phase Current Inverse Definite Minimum Time (IDMT) Limit Component (Standard inverse, Very inverse, Extremely inverse).

• Three-stage directional zero sequence protection (independent tripping or alarm).

• Zero sequence Inverse Definite Minimum Time (IDMT) Limit Component (Standard inverse, Very inverse, Extremely inverse).

• Three-phase reclosing function.

• Over-current acceleration protection and zero sequence acceleration protection (pre-acceleration and post-acceleration).

• Overload component (independent tripping or alarm).

• Under-frequency load shedding function. 

• Low voltage and overvoltage protection component. 

• CT break detection.

• CT break detection. 

• Control loop disconnection monitoring.

• Measurement and control.

Main feature:

• The device adopts a new generation of high-performance 32-bit CPU, so that the stability and computing speed of the product are fully guaranteed.

• The acquisition module adopts 16-bit A/D converter, and the measurement and calculation indexes can easily meet the requirements.

• A large-capacity storage module can record up to 32 wave recording reports, recording at least 1000 events, and maintaining power failure.

•  The high precision clock chip ensures the accuracy of the clock when the device loses power.

• Equipped with high-speed dual Ethernet communication interface.

• Careful electrical design, the whole machine has no adjustable devices, to realize the concept of debugging.

• High-grade, high-quality components selection.

• Complete self-diagnosis function.

• Case design with moisture, dust and vibration resistance. 

   

Technology parameters:

Device structure:

Device terminal definition diagram:

Installation Diagram：