产品信息 - AIS-air switchyard equipment-disconnector-circuit breaker-current transformer-voltage transformer-ca->circuit breakers

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China Transpowers Electric Co., Limited

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AIS-air switchyard equipment-disconnector-circuit breaker-current transformer-voltage transformer-ca

产品分类 :

機械與設備->電子、電力、電氣機械->斷路器

AIS-air switchyard equipment-disconnector-circuit breaker-current transformer-voltage transformer-ca

产品规格

Country	CN
Brand	CTSS

产品描述

Air-Insulated Substation and Switchyard An air-insulated substation or
switchyard has the insulating medium of air

CIRCUIT BREAKER (CB) has been around for almost as long as industrial electrical power usage. They react automatically to fluctuations in electrical current, and trip to protect a circuit from damage from overloading or short circuiting. Modern SF6 type circuit breakers use compressed gas to interrupt current flow and are common in electrical power substations.
Current interruption in a high-voltage circuit-breaker is obtained by separating two contacts in a medium, such as sulfur hexafluoride (SF6), having excellent dielectric and arc-quenching properties. After contact separation, current is carried through an arc and is interrupted when this arc is cooled by a gas blast of sufficient intensity.

DISCONNECTOR (DS) or named as disconnect switch or isolator switch is used to ensure that an electrical circuit is completely de-energised for service or maintenance. Such switches are often found in electrical distribution and industrial applications, where machinery must have its source of driving power removed for adjustment or repair.
High-voltage isolation switches are used in electrical substations to allow isolation of apparatus such as circuit breakers, transformers, and transmission lines, for maintenance.
The disconnector is usually not intended for normal control of the circuit, but only for safety isolation.
Disconnector can be operated either manually or automatically (motorized disconnector).

According to its structure and wheter be equipped with earthing switch, the DS can be divided into various types: non earthing switch, left earthing switch, right earthing switch, double earthing switches.

CURRENT TRANSFORMER (CT) is used for measurement of electric currents. When current in a circuit is too high to directly apply to measuring instruments, a current transformer produces a reduced current accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instruments. Current transformer also isolates the measuring instruments from what may be very high voltage in the monitored circuit. It commonly used in metering and protective relays in the electrical power industry.

According to the insulation medium, the current transformer can be divided in to SF6 CT and Oil immersed CT.
The SF6 current transformer is inverted type and is composed by the shell, main body, insulation bushing and foundation, which is insulated by SF6 gas.
Lightning arrester(LA) also named as surge arrester(SA) is a device used on electrical power systems to protect the insulation on the system from the damaging effect of lightning. Metal oxide arrester (MOA) have been used for power system protection since the mid 1970s. It has a high voltage terminal and a ground terminal. When a lightning surge or switching surge travels down the power system to the arrester, the current from the surge is diverted around the protected insulation in most cases to earth.


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