Guodian Nanzi PSV693U microcomputer integrated protection
Principle description
The device is mainly composed of four plug-ins.
1. AC plug-in to complete PT voltage acquisition.
2. Power supply plug-in, which converts AC 220V or DC to CPU available 5V voltage, and also completes PT voltage acquisition.
3. CPU plug-in, for PT voltage sampling calculation, switching value input, PT parallel logic judgment, low-voltage protection judgment.
4. The outlet plug-in is composed of relay and outputs PT parallel contact or low-voltage protection action contact. There are many plug-ins that can be output.
8. For the docking point, each contact can be set to act or not according to the PT parallel needs.
Guodian Nanzi PSV693U microcomputer integrated protection
1.2 Technical characteristics
1. The international high-speed processor is adopted, with the main frequency of 200MHz, rich built-in resources and simple peripheral circuit design to ensure the manufacturing quality and stability of the product. Sufficient hardware resources, 4M byte Flash Memory memory, 8M byte SDRAM.
2. With USB interface, the device program can be directly upgraded through the USB flash disk, and the action information and fault recording data can be directly stored in the USB flash disk to facilitate fault analysis.
3. Measure three-phase current and zero sequence current (Ia, Ib, Ic, Io), three-phase or line voltage (Uan, Ubn，Ucn，Uab，Ubc，Uca）， Active power P, reactive power Q, power factor cos φ, frequency f, active energy kWh, reactive energy kVarh.
4. The measured values of current, voltage, power and electrical degree can not only reflect the fundamental wave, but also correctly reflect the 2nd~13th harmonics, so that the measurement results are consistent with the special measuring meter.
5. It has a 4~20mA DC analog output (which can be customized as current, voltage or power) to replace the AC acquisition transmitter.
6. For more 14 channels, users can define the input quantity interface of the name.
7. The outlet mode of the protection element can be set through the tripping matrix to facilitate the user to select the relay to act. All relay outlet contacts can be selected as tripping contact (automatic return) or signal contact (return after reset).
8. With its own operation circuit, it can adapt to the tripping and closing current of 0. high~high switches.
9. GPS time synchronization can adopt hard contact sub pulse or second pulse mode, and it also supports IRIG-B time synchronization mode (RS485 interface).
10. Differential protection has criteria to prevent misoperation of differential protection due to TA saturation when equipment starts or external faults occur.
11. Effective and reliable PT disconnection criterion can effectively prevent misoperation of low-voltage components of the motor.
12. Two 100M Ethernet communication interfaces and one RS485 communication interface support IEC60870-5-103, Modbus and other protocols.
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