The Experts below are selected from a list of 483 Experts worldwide ranked by ideXlab platform

Zhigang Li - One of the best experts on this subject based on the ideXlab platform.

  • Research on Miniature Circuit Breaker Breaking Dissipation Process
    2013
    Co-Authors: Zhigang Li, Huan Huang
    Abstract:

    Contact is the execution unit of Miniature Circuit Breaker, and the voltage and current waveform between contacts is the most direct reflection of its operating performance and protection features. In the MCB breaking process, the voltage and current that contact carries dynamically change. The waveforms can not only reflect the contact's dynamic behavior, but also reflect the arcing phenomenon and contact wear. So, researching monitoring technology of MCB contacts' voltage and current dynamic waveforms is significant and it is helpful to research contact electromechanical wear and performance degeneration of the MCB. This paper mainly studies the dynamic monitoring technology on Miniature Circuit Breaker contacts voltage and current. And further research the calculation method for arc energy.

  • Research of Electro-dynamic Repulsion Force of Miniature Circuit Breaker Contact
    2013
    Co-Authors: Jun Fang Zhang, Zhigang Li
    Abstract:

    In the process of Miniature Circuit Breaker's short Circuit breaking, the short-Circuit current will cause the electro-dynamic repulsion force between the pairs of contacts, thus there is a certain influence on the movement of operating mechanism. The electro-dynamic repulsion force is composed of the Lorentz force and the Holm force. In this paper, the electro-dynamic repulsion force of the contact is researched. The Holm force is calculated under different currents. Lorentz force under different contact gaps and different currents are simulated and analyzed. The results show that Holm force accounts for about 30% in electro-dynamic repulsion force, and Lorentz force accounts for about 70%. When contact gaps is 0mm, electro-dynamic repulsion force plays more important role in accelerating the contact breaking.

  • Miniature Circuit Breaker Electromagnetic Release Simulation and Analysis
    Applied Mechanics and Materials, 2013
    Co-Authors: Jun Fang Zhang, Yao Fang, Zhigang Li
    Abstract:

    With the three-dimensional field analysis software Ansoft, we establish three-dimensional finite element model of the electromagnetic release, obtain the electromagnetic release static characteristics of electromagnetic force by simulation, and analyze the relationship between the electromagnetic force, the short-Circuit current and the air gap size. By Analyzing the dynamic characteristics of moving iron core, different short-Circuit currents influence on the velocity and displacement of the moving iron core was gained.

  • Influence of Eddy Current Effect on the Circuit Breaker Contact Mechanism Heat Loss
    Advanced Materials Research, 2013
    Co-Authors: Da Yang Wang, Zhigang Li
    Abstract:

    With the three-dimensional field analysis software Ansoft Maxwell 3D, the three-dimensional finite element model of the contacts pair is established. They belong to a kind of Miniature Circuit Breaker. The simulation is carried out in the transient magnetic field. Under the condition with or without eddy current effect, we get the position and numerical solution of the contact mechanism heat loss under different short-Circuit current.

  • Research on Voltage and Current Monitoring System for Circuit Breaker
    Applied Mechanics and Materials, 2013
    Co-Authors: Zhigang Li
    Abstract:

    This article develops the automatic test system of voltage and current dynamic waveform for Circuit Breaker. The system has the automatic monitoring, the storage and the display function of contact voltage and current waveform of Circuit Breaker in switching process. And then, it also designs the hardware and software of voltage and current dynamic monitoring system for Miniature Circuit Breaker: the hardware Circuit of this test system mainly consists of the detection Circuit and the data acquisition Circuit of current and voltage. And the software system, which mainly consists of control program, data acquisition program and data processing program, is programmed under the condition of LabVIEW. At last, it carries on the real-time monitor to the voltage and current waveform at the both ends of the Circuit Breaker, especially for the waveform during the switching process, which contributes to study the arc energy and contact wear of Circuit Breaker.

L. O. M. Sinar - One of the best experts on this subject based on the ideXlab platform.

  • Automatic recloser Circuit Breaker integrated with GSM technology for power system notification
    2015
    Co-Authors: Musa Yusup Lada, N. H. Rahim, S. A.c. Ghani, Mohamad Riduwan Md Nawawi, Mohd Shahril Ahmad Khiar, L. O. M. Sinar
    Abstract:

    Lightning is one type of transient faults that usually cause the Circuit Breaker in the distribution board trip due to overload current detection. The instant tripping condition in the Circuit Breakers clears the fault in the system. Unfortunately most Circuit Breakers system is manually operated. The power line will be effectively re-energized after the clearing fault process is finished. Auto-reclose Circuit is used on the transmission line to carry out the duty of supplying quality electrical power to customers. In this project, an automatic reclose Circuit Breaker for low voltage usage is designed. The product description is the Auto Reclose Circuit Breaker (ARCB) will trip if the current sensor detects high current which exceeds the rated current for the Miniature Circuit Breaker (MCB) used. Then the fault condition will be cleared automatically and return the power line to normal condition. The Global System for Mobile Communication (GSM) system will send SMS to the person in charge if the tripping ...

  • Automatic recloser Circuit Breaker integrated with GSM technology for power system notification
    AIP Conference Proceedings, 2015
    Co-Authors: Musa Yusup Lada, N. H. Rahim, S. A.c. Ghani, Mohamad Riduwan Md Nawawi, Mohd Shahril Ahmad Khiar, L. O. M. Sinar
    Abstract:

    © 2015 AIP Publishing LLC. Lightning is one type of transient faults that usually cause the Circuit Breaker in the distribution board trip due to overload current detection. The instant tripping condition in the Circuit Breakers clears the fault in the system. Unfortunately most Circuit Breakers system is manually operated. The power line will be effectively re-energized after the clearing fault process is finished. Auto-reclose Circuit is used on the transmission line to carry out the duty of supplying quality electrical power to customers. In this project, an automatic reclose Circuit Breaker for low voltage usage is designed. The product description is the Auto Reclose Circuit Breaker (ARCB) will trip if the current sensor detects high current which exceeds the rated current for the Miniature Circuit Breaker (MCB) used. Then the fault condition will be cleared automatically and return the power line to normal condition. The Global System for Mobile Communication (GSM) system will send SMS to the person in charge if the tripping occurs. If the over current occurs in three times, the system will fully trip (open Circuit) and at the same time will send an SMS to the person in charge. In this project a 1 A is set as the rated current and any current exceeding a 1 A will cause the system to trip or interrupted. This system also provides an additional notification for user such as the emergency light and warning system.

Cheng Ya-ping - One of the best experts on this subject based on the ideXlab platform.

Musa Yusup Lada - One of the best experts on this subject based on the ideXlab platform.

  • Automatic recloser Circuit Breaker integrated with GSM technology for power system notification
    2015
    Co-Authors: Musa Yusup Lada, N. H. Rahim, S. A.c. Ghani, Mohamad Riduwan Md Nawawi, Mohd Shahril Ahmad Khiar, L. O. M. Sinar
    Abstract:

    Lightning is one type of transient faults that usually cause the Circuit Breaker in the distribution board trip due to overload current detection. The instant tripping condition in the Circuit Breakers clears the fault in the system. Unfortunately most Circuit Breakers system is manually operated. The power line will be effectively re-energized after the clearing fault process is finished. Auto-reclose Circuit is used on the transmission line to carry out the duty of supplying quality electrical power to customers. In this project, an automatic reclose Circuit Breaker for low voltage usage is designed. The product description is the Auto Reclose Circuit Breaker (ARCB) will trip if the current sensor detects high current which exceeds the rated current for the Miniature Circuit Breaker (MCB) used. Then the fault condition will be cleared automatically and return the power line to normal condition. The Global System for Mobile Communication (GSM) system will send SMS to the person in charge if the tripping ...

  • Automatic recloser Circuit Breaker integrated with GSM technology for power system notification
    AIP Conference Proceedings, 2015
    Co-Authors: Musa Yusup Lada, N. H. Rahim, S. A.c. Ghani, Mohamad Riduwan Md Nawawi, Mohd Shahril Ahmad Khiar, L. O. M. Sinar
    Abstract:

    © 2015 AIP Publishing LLC. Lightning is one type of transient faults that usually cause the Circuit Breaker in the distribution board trip due to overload current detection. The instant tripping condition in the Circuit Breakers clears the fault in the system. Unfortunately most Circuit Breakers system is manually operated. The power line will be effectively re-energized after the clearing fault process is finished. Auto-reclose Circuit is used on the transmission line to carry out the duty of supplying quality electrical power to customers. In this project, an automatic reclose Circuit Breaker for low voltage usage is designed. The product description is the Auto Reclose Circuit Breaker (ARCB) will trip if the current sensor detects high current which exceeds the rated current for the Miniature Circuit Breaker (MCB) used. Then the fault condition will be cleared automatically and return the power line to normal condition. The Global System for Mobile Communication (GSM) system will send SMS to the person in charge if the tripping occurs. If the over current occurs in three times, the system will fully trip (open Circuit) and at the same time will send an SMS to the person in charge. In this project a 1 A is set as the rated current and any current exceeding a 1 A will cause the system to trip or interrupted. This system also provides an additional notification for user such as the emergency light and warning system.

Purcar Marius - One of the best experts on this subject based on the ideXlab platform.

  • Numerical simulations of the electromagnetic field shielding performances for reducing the induced faults in the coils of a three-phase Miniature Circuit Breaker
    2016 International Conference and Exposition on Electrical and Power Engineering (EPE), 2016
    Co-Authors: Conecici-lucian Madalin, Munteanu Calin, Purcar Marius
    Abstract:

    This paper presents the computer aided design (CAD) model and the computer aided engineering (CAE) simulation technologies for the analysis of the electromagnetic field shielding performances in a three phase Miniature Circuit Breaker (MCB). The shields are used to reduce the electromagnetic field (EMF) interferences and induced current between the coils. The shielding capacity of different materials is studied, as well as the different thickness of the shielding material. A conclusion can be drawn, of what kind of material and material thickness is more suitable for this application fields.

  • Induced fault current simulation of a three phase Miniature Circuit Breaker: Simulation of fault and comparison to tripping curve of the MCB
    2016 International Conference and Exposition on Electrical and Power Engineering (EPE), 2016
    Co-Authors: Conecici-lucian Madalin, Munteanu Calin, Purcar Marius
    Abstract:

    This paper presents the computer aided design (CAD) and computer aided engineering (CAE) modeling of a 3 phase Circuit Breaker in order to analyze the electromagnetic field (EMF) distribution, and the induced current generated by a fault in one of the three phases. In a first step the detailed three dimensional (3D) CAD model of the Circuit Breaker is created in the CAD environment PTC Creo Elements v.18.1. Then, the exact 3D model is imported in the Ansoft Maxwell v. 15 CAE environment and the electromagnetic field distribution and induced current are computed. The fields along the axis trough the coils are compared to the catalog tripping characteristic of a 3 phase MCB.