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Column high voltage circuit breaker series
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Focus on 10kV distribution ring network cabinet
Ring network cabinet is a group of high-voltage switchgear installed in steel plate metal cabinets or electrical equipment made of assembled spaced ring network power supply units. Improve power supply parameters and performance as well as power supply security and other advantages.
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How much do you know about box-type substations and ring main units?
Ring network cabinet refers to a closed ring network formed by power supply trunk lines in the power supply area in order to ensure the continuity, reliability and safety of high-voltage and low-voltage power supply systems in large residential areas, large shopping malls, and large power companies. The ring network is more than two box-type substations, as shown in the figure below, please pay attention: Rongji igniter
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Ring network refers to a ring-shaped distribution network, that is, the power supply trunk forms a closed ring, and the power supply supplies power to this ring trunk line, and then distributes power to the outside through the high-voltage switch all the way from the trunk line.
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Simulation Control Design of Function of Ring Main Unit in Distribution Network
Ring network cabinet is a group of electrical equipment that installs high-voltage switchgear in steel metal cabinets or assembles spaced ring network power supply units. Its core components are circuit breakers, load switches and fuses. The ring main unit is used for splitting and closing load current, breaking short-circuit current and transformer no-load current, charging current of overhead lines and cable lines at a certain distance, and plays the role of control and protection. It is an important switch equipment for ring network power supply and terminal power supply. In the modern smart grid, the ring main unit as the intelligent terminal of the distribution network has become an important part of the smart grid construction, and the research technology of the smart ring main unit has also attracted the attention of professionals. Scale of power system structure
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"It is necessary to explore and build a scientific management system, conscientiously fulfill safety responsibilities, social responsibilities, and business responsibilities, continue to strengthen the leadership of party building, and use systematic thinking and comprehensive focus to combine 'current reform' and 'long-term establishment' to ensure thematic education. Achieve actual results." On August 7, at the State Grid Jiangxi Electric Power Co., Ltd.'s "Do not forget the original intention, remember the mission" theme education research results exchange meeting, members of the company's leadership team carefully discussed the problems found in the research, in-depth analysis to solve the problem countermeasures to promote the transformation of research results. Since the theme education was launched, the State Grid Jiangxi Electric Power Party Committee has firmly grasped the main line and implemented the study
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What should I do when a common circuit breaker encounters a fault?
Common troubleshooting methods are as follows: 1. Noise of undervoltage release The undervoltage release often produces abnormal noise after working for a period of time, ranging from disturbance to coil burnout, so the iron core should be removed regularly Oil stains and dust on the working surface, if the short-circuit ring is found to be broken, it should be replaced. The spring tension of the undervoltage release should also be adjusted until the air gap between the iron core and the armature meets the requirements. 2. Burnout of the micro motor The failure of the travel switch will cause the micro motor in the electric operating mechanism to burn out. For example, when the circuit breaker needs to be closed by the electric operating mechanism, press the closing button, the power supply circuit of the motor is connected, and the motor rotates. However, due to the failure of the travel switch, it cannot be disconnected, which will cause the motor to overheat and burn for a long time. 3. Short circuit caused by poor insulation The insulation performance of the circuit breaker will gradually deteriorate after long-term use. If it is not properly maintained, dust on the surface of the insulation parts will accumulate and moisture will corrode, which will accelerate the aging of the insulation and may cut off short-circuit current during power distribution operation. cause short-circuit between phases or phase-to-ground. Therefore, it is necessary to keep the insulation surface clean to prevent the insulation performance from deteriorating, so as to prolong the service life of the circuit breaker.
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How to judge there is a problem with the electrical high-voltage switchgear?
Due to the different faults in the high-voltage switchgear, the corresponding detection methods are also different.
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The installation site of the circuit breaker on the pole
The installation site of the circuit breaker on the pole
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Overview of vacuum circuit breakers
The vacuum circuit breaker is named because the arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are all high vacuum.
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Safety of using vacuum circuit breakers
When the vacuum circuit breaker is in use, the breaking current is small, which is to break small inductive currents such as the excitation current of the no-load transformer, so the current is often cut off to generate a cut-off overvoltage, and the larger the cut-off value, the greater the overvoltage generated. high. In addition, when the vacuum circuit breaker disconnects the capacitive current of the capacitor bank, it is difficult to achieve absolutely no arc re-ignition, and once the re-ignition occurs, a re-ignition overvoltage will occur.
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JIANGXI KERUI ELECTRIC CO., LTD.
Add：No. 439, No.1 Road, Area A, Xiaolan Economic and Technological Development
Fax：0791-8575 1610