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1. Single Phase) Time Overcurrent Relay with Voltage Restraint (51/27R) .

2. The overcurrent level in each line must be analyzed for periods of five years to allow bigger flexibility in planning.

3. Overcurrent protection devices are essential in electrical systems to limit threats to human life and property damage.

4. Through a small auxiliary power system, the Overcurrent Coordination Progam is introduced.

5. The paper analyses the failure cause and overcurrent tactics of IGBT, describes the protecting principle of EXB841 and its disadvantages, introduces the improved driver circuit.

6. To solve th is problem, the inter-block reverse overcurrent relay is proposed in this paper , which makes more substations′ connection possible.

7. This paper narrates the fundamental principle of overcurrent protective system in underground LV cable networks.

8. The present invention relates to an overcurrent protection circuit of microwave over heater. It is formed from several heaters, relays and safety fuse.

9. Accurate electrical network automatic compensation and overcurrent, overvoltage , undervoltage, overheating, etc protection functions make welding machine more safety and credibility.

10. The equivalent overcurrent protection test is carried out through a inductive load.

11. For such motor running overcurrent protection device must be to install.

12. Designed systems include cross-current control, current control,[Sentencedict] overcurrent protection and cross-current protection.

13. For instance, if a laser is experiencing an overcurrent situation that could lead to machine failure, the sensors would detect this so that the situation can be addressed before a failure occurs.

14. An "Overcurrent Relay" is a type of protective relay which operates when the load current exceeds a preset value.

15. For IGCT or GTO, the overcurrent protection is generally implemented in the main circuit, which brings complex main circuit, high cost and great volume.

16. Using the method of window moving in real time, the root mean square value of current of the last cycle was calculated as the criteria for instantaneous overcurrent protection.

17. The system includes modules of generating SPWM signals, inverter circuit and its control tactic, undervoltage and overcurrent protection, keyboard and display.

18. The ANSI Device Designation Number is 50 for an Instantaneous OverCurrent (IOC), 51 for a Time OverCurrent (TOC).

19. For backup protection against high resistive ground faults, there will be a dual polarized directional overcurrent relay(sentencedict.com), inverse time with instantaneous trip attachment.

20. A simple circuit breaker delivers precision overvoltage protection and overcurrent protection.

21. The fan protector includes a temperature sensing unit, an overcurrent sensing unit and an alarm unit.

22. The relay is made up of integrated circuits. The line instantaneous overcurrent protection and overcurrent protection are combined with the once 3-phase reclosure application to form a whole body.

23. Typical applications include motor control, load detection and management, power supplies, and overcurrent fault protection.

24. Main reasons for serious breakdown in these devices are: overcurrent, overvoltage and various interference.

25. In order to design a credible and steady system, the function of overvoltage, undervoltage, overcurrent and overload protection is designed in the paper.

26. The switch frequency is increased and the output harmonic is decreased while the overcurrent protection is ensured.

27. To meet this requirement, the new relay developed consists of a combination of directional overcurrent relay and directional undervoltage relay.

28. In this paper, the design of single chip of lithium-ion battery protector is discussed. Protection includes preventing overcharge, overdischarge and overcurrent states in the lithium-ion batteries.

29. An unbalanced control strategy of feed-forward control for negative sequence voltage is also carried out to suppress converter overcurrent caused by negative voltage in order to make D-STATCOM safe.

30. The improved PSO algorithm is tested in two models, to show the effects of improvement and its ability in solving the inverse time overcurrent relay coordination problem when DG units are connected.