وكلاء CONTACTUM

وكلاء CONTACTUM (2)

وكلاء شركة LKE لقواطع الضغط العالي والمنخفض...

وكلاء شركة REPLللترمنيشن والتوصيلات الأرضية للضغط ...

وكلاء شركة نيوكوريا NKE للمحولات الكورية...

وكلاء شركة LKE لقواطع الضغط العالي والمنخفض

Introduction
The LK-VLBS is a three phase vacuum interrupter switch with a high breaking capacity.

Application
It was primarily designed for power networks and substation systems where it could replace vacuum circuit breakers in selective applications.

Description of functions
On each phase, a vacuum interrupter performs the function of arc quenching. The vacuum interrupter is housed in an insulating shield. This reduces the size of the switch so that it can be housed in panels of sizes as small as 470mm wide x 900mm deep x 1900mm high.

The LK-VLBS is also built to house HV HRC fuses. A stored energy mechanism on the LK-VLBS allows for shunt tripping and fuse triggered tripping. Hence, with fuses the LK-VLBS can achieve up to 50 kA in short circuit breaking capacity. With fuses, the speed of interruption can reach times of less than 10 ms, depending on the time/current characteristic of the fuse selected.

The vacuum interrupter switch when controlled by a current protection relay unit protects for overload and fault currents up to 20kA. Furthermore when used in combination with HV HRC fuses the fuses act as backup devices for fault current levels of up to 50 kA. In the event of overloading, the current protection relay triggers the switch so that the vacuum interrupter, in place of the fuse, breaks the current. This overcomes the traditional shortfall of relying soley on fuses for overload protection whereby fuses are relatively insensitive towards small overload.

During short circuit, either the interrupter or the fuse breaks the current, depending on the current level. Selective discrimination between the fuse and the vacuum interrupter is achieved by coordinating the time/current curves of the relay and the fuses. Thus with the fuse combination double protection of downstream equipment is achieved, making the LK-VLBS superior as a choice for overload and fault protection equipment.

Manufacturing and Endurance
Components for the three-phase operation are mounted on a chasis which also mounts an optional isolator on the incoming end and a fault-making earth switch on the out going end of the interrupter. These last two components are interlocked in an opposed operating sequence towards each other and at the same time interlocked with the vacuum interrupter to ensure proper operating sequence.

The LK-VLBS is capable of interrupting fault current levels up to 20kA through the vacuum interrupter when the switch is controlled by a current protection relay system.The LK-VLBS interrupts short circuit currents at within less than 50ms of fault detection (excluding the processing time of the relay.).

 

Like other vacuum switches, LK-VLBS have a high electrical enduarance of more than 10,000 times, and virtually maintainence free.

وكلاء شركة نيوكوريا NKE للمحولات الكورية


Transformer specification

  • Phase : Single phase / Three phase
  • Frequency : 50Hz or 60Hz
  • Rated Capacity : 50kVA ~ 3000kVA
  • System Voltage : H.V.-Below 480V, 3.15kV, 6.3kV, 23kV, 33kV
                             L.V.-Below 480V, 3.15kV, 6.3kV
  • We developed VPI transformer with advanced technology of DuPont.
    It's brand name is ReliatraN
    ® that means "Safety" " Reliability", and "Environmentally Friendly".
    Brand "ReliatraN
    ®is the distribution transformer technology that has superior compariable qualities because of advanced technology know-how.

 

  • Characteristics

    1)High stability
    - Flame retardant(using premium flame-retardant materials)
    - Minimization of losses of human/property by fire.

    2)High reliability
    - Excellent over-load capacity
    - Minimization of occurrence of partial discharge
    - No crack
    - Excellent short circuit strength

    3)High Economical values and convenience
    - Saving the cost for the use of power electricity
    - Minimization of space for installation and operation
    - Available for the installation close to live-load.

    4) Longest Warranty
    - Qualified ReliatraN transformers offer unprecedented five (5)years warranty

وكــــلائـنــا

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نبذه مختصره

 تم تأسيس الكف الأخضر للكهرباء في عام 1979م في مدينة الحديدة الساحلية وبدأ الاستيراد في عام 1980م

كان النشاط الرئيسي للكف الأخضر هو استيراد المواد الكهربائية المنزلية

 وبدأ الكف الأخضر في استيراد الكابلات النحاسية من المملكة العربية السعودية في اواسط الثمانيات المزيد

 

للتواصل معنا

الجمهورية اليمنية - الحديدة - جوار جامع الكويت  

تلفون :  209700 - 209777   

ص.ب : 3551                فاكس :  209800