Guodian Nanzi PST693U transformer protection device

Nanzi microcomputer integrated protection PST693U transformer protection device

1 Technical characteristics
1. High speed processor is adopted with 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 measurement 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. More than 14 channels of user definable input interface.
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. It has its own operation circuit, which 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 also support 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 fault occurs.
11. Effective and reliable PT disconnection criteria 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.
13.9 fault recording, each recording contains 1.9 seconds of sampling points and amplitude recording, the sampling point recording contains 14 analog quantities (with an interval of 1mS), and the amplitude recording contains 40 analog quantity amplitudes and 32 switching values (with an interval of 5mS). Two motors start wave recording (interval is 100mS), 1s before starting and 29s after starting. The wave recording adopts the standard Comtrade format.
14. Full graphic programming technology and stable and reliable protection relay library are adopted to improve the reliability and correctness of the program.
15. The static power consumption of the whole machine is low (about 6W), and the LCD module adopts new technology, which greatly improves its service life.
16. High anti-interference performance. It has passed 10 electromagnetic compatibility testing certifications, and the anti-interference performance of fast transient, electrostatic discharge and surge has reached the level (Level IV) standard.
17. Temperature range of working environment: - 25 ℃~＋ 55 ℃ (no blurring and dullness of liquid crystal).

Nanzi microcomputer integrated protection PST693U transformer protection device

1 Function
1. Three section composite voltage overcurrent protection
2. Inverse time overcurrent protection
3. Two section definite time negative sequence overcurrent protection
4. Fixed time zero sequence overcurrent protection at HV side
5. Fixed time zero sequence overcurrent protection at low-voltage side
6. Inverse time limit zero sequence overcurrent protection at low-voltage side
7. Overload protection
8. Overvoltage protection
9. Low voltage protection
10. Non electric quantity protection
11. F-C blocking
12. I, U, P, Q, Cos φ active kilowatt hour, reactive kilowatt hour, 14 channel switching value acquisition
13.4-20mA output (optional, please state when ordering)
14. GPS time synchronization (minute pulse, second pulse or IRIG-B mode)