WISCOM protection relay , WDZ-430EX motor integrated protection and measure device

Wdz-400 series includes the following models:

wdz-410 line integrated 

Protection measurement and control device

wdz-430 motor integrated protection measurement and control device

wdz-431 motor differential protection device

wdz-440 low voltage transformer integrated protection measurement and control device

Wdz-440ex microcomputer protection function configuration is as follows:

1. Overcurrent (quick break) protection of section I (with directional locking, low-voltage locking, negative pressure locking and fixed value doubling)

2. Overcurrent (* * * * quick break) protection of section II (with directional locking, low-voltage locking, negative pressure locking and fixed value doubling)

3. Overcurrent (definite time overcurrent) protection of section III (with direction locking, low voltage locking, negative pressure locking and protection exit)

4. Inverse time overcurrent protection (four characteristic curves of IEC standard inverse time)

5. Rear acceleration protection

6. Overload protection

7. Negative sequence current protection

8. Zero sequence current protection

9. Single phase grounding line selection protection (fifth harmonic criterion can be selected)

10. Overvoltage protection

11. Low voltage protection

12. Voltage loss protection

13. Negative sequence voltage protection

14. Air cooling control protection

15. Zero sequence voltage protection

16. Low cycle load shedding protection (with voltage lockout, slip lockout and under current lockout)

17. Low voltage disconnection protection (with slip locking and under current locking)

18. Reclosing protection (with no voltage detection and synchronous detection)

19. Standby automatic switching protection (with automatic switching and automatic recovery, no voltage and no current)

20. Overheating protection

21. Reverse power protection

22. Protection for too long startup time

23. Definite time limit IX overcurrent protection

24. Inverse time IX overcurrent protection (four characteristic curves of IEC standard inverse time)

25. Protection option: motor parameters (Note 1)

26. Protection option: PT control (Note 2)

27. Protection option: Pt parallel switching (Note 3)

28. Non electric quantity protection 1 ~ 8 (Note 4)

Wdz-440ex microcomputer protection environmental conditions

Normal temperature: - 10 ℃ ~ 55 ℃

Limit temperature: - 30 ℃ ~ 70 ℃

Storage temperature: - 40 ℃ ~ 85 ℃

Relative humidity: ≤ 95%, no condensation

Atmospheric pressure: 80 ~ 110kpa