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Vacuum interrupter-FAQ

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What the type of vacuum contactors we have?

HVJ5-1.14/63B, HVJ5-1.14/80B, HVJ5-1.14/125, HVJ5-1.14/250, HVJ5-1.14/400, HVJ5-1.14/630, HVJ5-1.14/800,   HVJ5-1.14/1000,  HVJ5-1.14/400+.   HVJ7-1.14/1250, HVJ7-1.14/1600.HVJ3-7.2/160,   HVJ3-7.2/250,  HVJ3-7.2/400,    HVJ3-7.2/630A,  HVJ3-12/125, HVJ3-12/250, HVJ3-12/400,HVJ3-12/630.    HVJ6-7.2/200, HVJ6-7.2/400, HVJ6-7.2/630,  HVJ6-12/200,  HVJ6-12/400,  HVJ6-12/630.HVJ20-2/630, HVJ30-1.14/1250

The introduction of vacuum contactor

    The vacuum contactor uses the vacuum interrupter to extinguish the arc, which is used to frequently turn on and off the normal working current. It is usually used for 6kV, 380V (660V, 1140V) AC motors that are frequently turned on and off at medium and low voltages.Content.1 Overview.2 Composition.3 Working principle.4 Advantages5 Cause of failure Overview Series low voltage vacuum AC contactors are widely used in coal mines, electric power, metallurgy, and textiles. Various industrial sectors such as high-rise buildings.Low-voltage vacuum AC contactor for AC: 50HZ. Rated voltage: 1140V, rated current 63 to 630A feed network for long-distance switching and breaking circuits, and frequent starting and stopping of AC motors. It is especially suitable to be assembled into a flameproof electromagnetic starter in combination with various protection devices.Composition The vacuum contactor is mainly composed of a vacuum interrupter and an operating mechanism. The vacuum interrupter has two functions of reliable arc extinguishing through normal operating current and frequent interruption of operating current. However, the overload current and short-circuit current cannot be cut off. The operating mechanism is composed of a holding coil with an iron core and an armature. The coil is energized to attract the armature and the contactor is closed; the coil is de-energized and the contactor is disconnected. The holding coil is generally in the form of direct current and alternating current.The outer casing of the vacuum interrupter is made of glass or ceramic insulating material, and the internal vacuum is usually above 0.01 Pa. Since the air inside the casing is small, the contact opening distance can be made small and the arc can be easily extinguished. The contact material is generally made of an alloy of copper, tantalum or niobium. The function of the arc shield in the arc extinguishing chamber is to condense the metal vapor diffused in the gap of the contact when the current is interrupted, which helps to extinguish the arc, and also prevents the metal vapor from splashing onto the insulating shell to reduce the dielectric strength. The movable contact is connected with the lower end of the outer casing by a bellows, and the movable contact can move up and down without leaking. Working principle Vacuum contactors usually consist of an insulating power frame, a metal base, a drive arm, an electromagnetic system, an auxiliary switch, and a vacuum switch tube. When the electromagnetic coil passes the control voltage, the armature drives the arm to rotate, so that the main contact in the vacuum switch tube is turned on, and after the electromagnetic coil is powered off, the main contact is broken due to the action of the opening spring.The vacuum switch tube is composed of the above cover, the lower cover, the metal bellows and the ceramic tube, and the vacuum switch tube is made of a corrugated porcelain tube made of 95 porcelain insulating material, which has a large creepage distance and high mechanical strength. Heat and impact resistance. A pair of dynamic and static contacts are packaged in the vacuum switch tube, and the contact material is made of Cu-W-Wc with wear resistance and low cutoff value, so that the overvoltage caused by the interception during the breaking process is reduced under the condition of satisfying the breaking performance. The electrical life of the vacuum switch tube is increased. When the metal bellows moves axially, the moving contact is driven to perform the opening and closing action.The electromagnetic system considers the actual suction characteristics and the reaction force characteristics to be well matched, and exerts the advantages of low noise and power saving during operation of the contactor. The residual double coil is composed of starting and maintaining two windings, and is switched by the auxiliary switch, in order to facilitate the user to communicate. Power operated, the contactor has a bridge rectifier.Mechanical lock: When the closed coil is energized, the contactor is sucked and the mechanical lock is locked: when the trip coil is energized, the mechanical lock is released, the contactor is released, and the trip coil is in the hot state, the voltage is in Us85 The contactor is reliably released within the range of %-110%. Advantages The vacuum contactor has strong arc-extinguishing ability, good pressure resistance performance, high operating frequency, long service life, no arc external spraying, small volume, light weight and long maintenance period. The vacuum interrupter of the vacuum contactor has a high process requirement, and if the process is poor, the vacuum of the arc extinguishing chamber is liable to decrease. The material of the contact material is not good. When the current is interrupted, the phenomenon of "cut-off over-voltage" will occur. That is, when the current is interrupted, the arc-extinguishing capacity of the vacuum interrupter is very strong, and the arc current is not cut off when the natural zero-crossing occurs, but A certain value of the current suddenly drops to zero, whereby a high overvoltage occurs. The cut-off voltage can jeopardize the safe operation of electrical equipment.Cause of failure Whether the vacuum contactor is faulty can be judged according to whether it can be closed, opened and reliably maintained at the closing and opening positions. Faults in the main circuit can be found and eliminated from the routine maintenance and maintenance of the contactor.The main causes of common failures are analyzed as follows:Can not store energy: Can not store energy is one of the more common faults of vacuum contactors, especially the energy storage mechanism driven by ratchet and pawl, the probability of failure is high. The energy storage mechanism needs to complete the energy storage operation, which mainly depends on the three parts of the energy storage motor, the drive mechanism and the positioning parts. Grasping these three links, it is easy to find the crux of the failure.No closing action: There is no closing action failure, which is mainly related to whether the closing electromagnet is sucked, whether the energy storage is in place, and whether the positioning member is in normal operation.Cavity: There is a closing action but the closing of the gate is called empty. In the analysis of such failures, the analysis should first be carried out from the closing (locking), and then whether it is related to the energy storage part.Do not open the brakes: It should be emphasized here that when the contactor is refused or cavitation, before analyzing and repairing the main body of the contactor, it is necessary to fully judge whether the cause is in the control and secondary components such as auxiliary switches, terminal blocks, etc. Aspects, then the analytical diagnosis of the contactor.

What is a vacuum interrupter?

The vacuum interrupter, also known as the vacuum switch tube, is the core component of the medium and high voltage power switch. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit is cut off by the excellent insulation of the vacuum inside the tube, avoiding accidents and Accidents occur mainly in power transmission and distribution control systems, and also in power distribution systems such as metallurgy, mining, petroleum, chemical, railway, broadcasting, communications, industrial high-frequency heating. It has the characteristics of energy saving, material saving, fireproofing, explosion-proof, small size, long life, low maintenance cost, reliable operation and no pollution. The vacuum interrupter is divided into the arc extinguishing chamber for circuit breaker and the arc extinguishing chamber for load switch. The circuit breaker arc extinguishing chamber is mainly used for substation and power grid facilities in the power sector, and the arc extinguishing chamber for load switch is mainly used for power grid. 

What is a vacuum circuit breaker?

"Vacuum circuit breaker" is named for its high dielectric energy due to its arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing; it has the advantages of small size, light weight, suitable for frequent operation, and no need for overhaul of arc extinguishing. The application in the power grid is more popular. The vacuum circuit breaker is an indoor power distribution device in a 3~10kV, 50Hz three-phase AC system, which can be used for protection and control of electrical equipment in industrial and mining enterprises, power plants and substations, especially suitable for oil-free and less For maintenance and frequent operation, the circuit breaker can be configured in the central cabinet, double cabinet, and fixed cabinet for controlling and protecting high voltage electrical equipment.

What kind of vacuum interrupter does JUCRO Electric produce?

Vacuum Interrupter Vacuum Interrupter We can produce the vacuum interrupter at the rated voltage from 1.14KV to 40.5KV, Rated current from 63A to 2500A.And we can produce the vacuum interrupter for the use of vacuum circuit breaker, vacuum contactor, load switch, recloser, etc.What else, if you can provide the drawings and the detail catalog of the vacuum interrupter, we can design and produce the vacuum interrupter as you want.

What is the advantage of vacuum interruper?

Benefits of vacuum interrupter: clean, reliable interruption, less maintenance and longer lifeTime-proven stored energy operating mechanismDuplicate racking mechanism for direct replacementFaster closing and opening timesMany common accessoriesShorter delivery time for new breakerAble to keep the existing equipment up and running at lower cost

What is the advantage of vacuum contactor?

Motor with frequent start-stop shall use vacuum contactor . Vacuum contactor is planned for millions on and off operations. Contactors are useful in commercial and industrial applications.

How about our news?

JUCRO

How to contact us?

Contact Person:Qiu MinE-mail:enquiry@jucro.comTel:86-717-4209218Fax:86-717-4209228Postcode:443209Wechat:535919910WhatsApp:+8613634212517Skype:qiuminuserAddress:4# RD, Xiannv, Zhijiang, Yichang, Hubei, China

What are the advantages of our products?

the advantage of vacuum interrupter 1. It is an environmentally friendly and easily recyclable technology.2. Using a vacuum interrupter housed in solid dielectric insulation ensures that utilities are using a sustainable technology. the advantage of vacuum contactor 1.Vacuum contactor is designed for millions on/off operation 2.Strong arc-extinguishing ability, good pressure resistance, high operating frequency, long life, no arc spray. 3.Small size, light weight, long maintenance period. the advantage of vacuum breaker 1.Arc extinguishing in a sealed container, arc and hot gas are not exposed.2.Contact gap is small, a few mm to 40mm.3.Short arcing time, low arc voltage, low arc energy, less contact wear, and more allowable breaks4.The movable rod has low inertia and is suitable for frequent operation.5.Small operating mechanism, small size and light weight.6.Small control power7.Low noise during operation8.No fire or explosion hazard during operation9. the maintenance cycle is long

Why choose JUCRO?

  Hubei Jucro Electric co.,LTD is the specialized pressure vacuum interrupter, vacuum cntactor and vacuum breaker production of high manufacturers. The company locats in the  national civilized city-Yichang with beautiful secenery, next to Three Gorges, convenient transportation, superior production environment.  The company not only with the production of vacuum devices need all kinds of advanced equipment and testing equipment, but also has professional and technical personnel engaged in research, production of vacuum device and a rich experience of manufacturing, high quality staff team, product design reasonable, advanced technology, strict inspection, development speed, product quality and stability.  

How do we pack our vacuum interrupter?

How do we pack our vacuum interrupter? Because the main prat of the vacuum interrupter is china, which is fragile, so they need more strong packages. First.  We customize some foam according to the size of the vacuum interrupter, the foam will be cut into two part. When pack the goods, we put the bottom part of the foam into the box and the put the vacuum interrupter which has been put int a plastic bag into the foam, then put the other part of the foam to the box, the products will be surround well by the foam, so the foam will protect the products very well.   If there is many boxes of the products We put the boxes onto a pallet and then fixed them well.  If there is only one or two box. We will pack the box with film and tape, then fixed the angle.

The production time of vacuum contactor?

Quantity(PCS) Time No less than 500 pcs Within 20 working days after receiving the payment. More than 500 pcs Negotiable

What trade terms do we support?

FOB, CFR, CIF, EXW, FAS, CIP, FCA, CPT.