High Voltage Disconnect Switch

A: CE,TSE,ROHS,ISO9001 and so on

A: Yes, we can make the products as different’s special require

A: We usually reansport by EXPRESS,such as DHL,TNT,FEDEXEMS for small order
Transport by sea ,by air or by train for huge quantity.

A: Sample order in stock. and 5-10days for bulk production

A: Normally, the warranty for the product is one year, warmly reception with the calling, visiting and letters, and give the best answers and solution in time from the customers for the technical problem.

A: There are two primary categories of high-voltage switchgear: Gas-insulated switchgear (GIS) and air-insulated switchgear (AIS). Whereas gas-insulated switchgear employs gas—Typically sulfur hexafluoride (SF6)—AIS switchgear uses air as its principal insulating medium.

A: A switchgear in an electric power system consists of electrical disconnect switches, fuses, or circuit breakers that regulate, protect, and isolate electrical equipment. Switchgear is used to deenergize equipment so that work may be done and to remove problems downstream.

A: Transformers adjust the voltage level to enable power transmission and distribution. Switchgear protects and disconnects electrical circuits. UPSs safeguard equipment from voltage fluctuations and outages by supplying backup and conditioned power.

A: The main function of the high-voltage disconnector is to disconnect or connect the high-voltage line under no-load conditions. At the same time, it can electrically isolate the high-voltage busbar, circuit breaker and other electrical equipment under maintenance to ensure the safety of personnel and equipment.

A: High-voltage disconnectors can be divided into indoor and outdoor types according to the installation location; They can be divided into single-pole and three-pole according to the number of poles; They can be divided into single-pole, double-pole and three-pole according to the number of insulating pillars; They can be divided into knife-type, rotary and plug-in types according to the action mode; They can be divided into knife-type with grounding knife and knife-type without grounding knife according to the presence or absence of grounding knife; They can be divided into manual, electric, pneumatic and hydraulic types according to the operating mechanism; They can be divided into general use, fast separation and transformer neutral point grounding according to the purpose.

A: The high-voltage disconnector is mainly composed of static contacts, bases, pillar insulators, pull rod insulators, moving contacts, transmission mechanisms, operating mechanisms, support bases, etc.

A: The "five protection" functions of high-voltage power distribution devices include: Preventing the circuit breaker from being opened or closed by mistake, preventing the disconnector from being pulled and closed with load, preventing the grounding wire (ground knife) from being hung (closed) with power, preventing the circuit breaker (disconnector) from being closed with the grounding wire (knife), and preventing the circuit breaker (disconnector) from being mistakenly entered into the live interval.

A: The high-voltage disconnector can switch the electrical equipment or lines from one set of busbars to another set of busbars through its knife or rotation mechanism, so as to achieve flexible switching of the circuit.

A: During operation, it is necessary to check whether the insulator is intact, crack-free, and has no discharge phenomenon; Whether the operating connecting rod and various mechanical parts are not damaged or rusted; Whether the various parts are tightened, correctly positioned, and have no abnormal phenomena such as skewness, looseness, and falling off; Whether the locking device is in good condition; Whether the arc extinguishing angle of the blade and the knife mouth is free of burns, overheating, deformation, rust, and tilting; Whether the contact contact is good; Whether the joints and contacts are free of overheating, etc.

A: Common types of failures of high-voltage disconnectors include porcelain bottle breakage failure, mechanism problems (such as operation jamming, inadequate closing and opening, rusting, water ingress and moisture, etc.), and heating of the conductive circuit.

A: To deal with the operation jamming problem, you can regularly check and replace the lubricating oil, replace the worn parts in time, and ensure the lubrication of the switch mechanism and the integrity of the parts.

A: Pull and close failure is usually caused by operating mechanism failure or poor contact of the contactor. The solution includes checking the working status of the operating mechanism, ensuring that the contactor is in good contact, and repairing or replacing it when necessary.

A: To avoid the high-voltage disconnector from being switched off with load, when the high-voltage disconnector is far away from the circuit breaker and it is difficult to use mechanical interlocking, the lock key of the high-voltage disconnector can be stored at the circuit breaker or on the operating handle of the control switch of the circuit breaker. Only after the circuit breaker is opened can the key be taken out to open the corresponding disconnector. At the same time, the auxiliary contacts on the operating mechanism of the oil circuit breaker can also be used to control the electromagnetic lock to lock the operating handle of the high-voltage disconnector.

A: The rated current refers to the working current that the high-voltage disconnector passes through for a long time, and the heat generation of each part does not exceed the allowable value. The thermal stability current refers to the maximum current allowed to pass within a certain specified time, which indicates the ability of the high-voltage disconnector to be thermally stable under short-circuit current.

A: When installing and using high-voltage disconnectors, you need to pay attention to the following points: Ensure that the disconnector is installed correctly and firmly; Check the open and closed positions of the circuit breaker before operation to prevent operating the disconnector under load; Manual operation must be quick and decisive, and excessive force should not be used; Lock the operating handle after the operation; Regularly maintain and inspect the disconnector to ensure that it is in good working condition.