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1685results about "Switchgear arrangements" patented technology

On-line intelligent monitoring module for intelligent transformer substation GISs (gas insulated switchgear)

The invention discloses an on-line intelligent monitoring module for intelligent transformer substation GISs, which comprises an SF6 monitoring function module, a circuit beaker monitoring function module, a capacitive equipment monitoring function modules for mutual inductors and the like, a lightning arrester monitoring function module, a station level communication function module and a human-machine interface function module. By means of the function modules, the on-line intelligent monitoring module for intelligent transformer substation GISs can monitor the gas insulation condition in a gas insulated metal-enclosed switchgear (GIS) and the operating condition of the primary equipment of each power system on line, consequently, power system operation maintainers can fully know the operating state of the GIS in real time and accordingly arrange the operation and maintenance time of the equipment, the safety of the operation of the GIS is enhanced, the safe operation of a power grid is effectively guaranteed, moreover, the maintenance method for the GIS is changed from the conventional scheduled maintenance to state maintenance, the equipment maintenance cost is effectively reduced, and the benefit of a power grid operation maintenance enterprise is increased.
Owner:NARI TECH CO LTD

Novel inflatable switch cabinet

The invention discloses a novel inflatable switch cabinet which comprises a cabinet body. A gas tank is arranged on the rear side of the cabinet body, a control chamber is arranged on the upper portion of the front side of the cabinet body, a cable chamber is arranged on the lower portion of the front side of the cabinet body, a vacuum breaker is arranged on the upper portion of the gas tank, an isolating switch is arranged in the middle of the gas tank, a main loop is arranged on the lower portion of the gas tank, and an isolating switch operating mechanism and a vacuum breaker operating mechanism are arranged in the control chamber. The isolating switch operating mechanism achieves switch-on, switch-off and ground connection of a disconnecting link by operating a first operating shaft and a second operating shaft, and power-driven operation can be achieved. The vacuum breaker comprises an insulation support, a vacuum bubble and an operating main shaft, the vacuum bubble is arranged in the insulation support in the mode with an upward dynamic contact, a conductive contact and a conductive piece are fixedly arranged on the lower portion of the insulation support and are fixedly connected with a static contact at the lower end of the vacuum bubble, the conductive contact and the disconnecting link are matched for switch-on, and the operating main shaft drives the dynamic contact at the upper end of the vacuum bubble to vertically move to achieve switch-on and switch-off of the vacuum breaker. The novel inflatable switch cabinet is compact in structure, reliable in motion, safe in use and convenient to maintain.
Owner:XIAMEN XEC ELECTRIC

Method for detecting and judging overheating fault of bus joint of gas insulation switch device

The invention discloses a method for detecting and judging an overheating fault of a bus joint of a gas insulation switch device. The method comprises the following steps of: selecting three temperature measuring points on a shell of a bus, and respectively measuring the temperature of three-phase conductors in the bus; providing an ambient temperature detection point in a predetermined range of the shell so as to obtain the ambient temperature; comparing the temperature of the three-phase conductors and the ambient temperature so as to respectively obtain temperature rises of the three-phase conductors; when the temperature is greater than the predetermined maximum allowed temperature rise, judging as the overheating fault of the bus; otherwise, storing the temperature rises of the three-phase conductors, and obtaining a temperature difference change trend meter according to the stored temperature rises; when the temperature trend meter shows that the temperature rise is continuously increased in the predetermined time, judging as the overheating fault of the bus. By adopting the invention, the accurate on-line detection of the overheating fault of the bus is realized, a failure operation is unnecessary, a bus structure is not improved, and the method has good safety and reliability.
Owner:FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID +1

High-voltage combined electrical apparatus

A high-voltage combined electrical apparatus is disclosed, which overcomes the following problems that: in the existing high-voltage combined electrical apparatus, an insulating sleeve has the dangers of leakage and explosion; the on/off induced current and the on/off bus transfer current of a three-position switch and a quick grounding switch are very difficult, so that the SF6 gas excellent in insulation property must be used; and a high-voltage circuit breaker is high in stress as being arranged in a high-pressure force gas. The high-voltage combined electrical apparatus has the following characteristic and advantages that: (1) all dry air or nitrogen is used as the insulating gas, so that the electric apparatus can be used under the condition of low temperatures; (2) a solid insulating sleeve is employed without the dangers of leakage and explosion; (3) the three-position switch and a high-voltage vacuum circuit breaker are designed to have a cordwood structure, so that the switch and the breaker can be plugged in flexible and a plurality of structure proposals are realized; and (4) the three-position switch and the quick grounding switch are characterized in that an opening spring is used as the power for quickly opening the isolating switch and the quick grounding switch, thereby achieving the purposes of the on/off induced current of the three-position switch and the on/off bus transfer current of the quick grounding switch.
Owner:SHENYANG HUADE HIGH TECH ELECTRIC CO LTD
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