Metal Clad Cell

Metal Clad Switchgears are medium voltage switchgear consisting of 3 main and 1 auxiliary sections, separated by grounded metal plates, with a drawer type switching element.

APPLICATION AREAS

blankEnergy Production and Distribution Facilities

  • Transformer Stations
  • Mines
  • Cement and Petrochemical Factories
  • Iron and Steel Enterprises
  • Pump Stations
  • Airports, Ports, Railways
  • Shopping Centers
  • Hospitals

ADVANTAGES

  • Withstand high current and short circuit (31.5kA /3 seconds),
  • Less space requirement with compact design (1200mm cell width for 36kV)
  • All compartments are separated by grounded metal and are fully isolated.
  • Ability to use with various types and features of breakers and protection control panels.
  • Drawer type switching elements are easy to change between panels.

MECHANICAL LOCKS

  • The cutter door can only be opened when the cutter is in the test position
  • The cutter trolley cannot be put into service position without being fixed to the panel
  • The breaker door cannot be closed until the low-voltage control cable has been replaced.
  • The breaker cannot be put into service position without closing the breaker door.
  • The cutter cart cannot be brought in without opening the soil knife.
  • If the cutter is in service, the ground knife cannot be closed.

ELECTRICAL INTERLOCKS

  • The breaker can only be operated in the test and service positions.
  • The entrance cell rear door cannot be opened without de-energizing the previous station.
  • The exit cell rear door cannot be opened until the cutter trolley is in the test position.
  • If the cutter is in service, the ground knife cannot be closed.
  • The input cell ground knife cannot be closed without de-energizing the previous station.

SAFETY

  • Pressure relief covers are A-FL at the back and A-FLR at the top and IAC class.
  • All maneuvers can be performed with the panel door closed.
  • Mechanical and electrical interlocks eliminate the possibility of incorrect maneuvering.
  • It is a fully isolated system with partitioning class PM.
  • Equipped with E2 class earth knife capable of 5 closures on short circuit.

BARA DEPARTMENT

It is the metal section that provides energy transmission between panels, conductors that can withstand high current and short circuit, and epoxy support insulators and sleeve insulators that fix these conductors to the panel. Access to the busbar section can be made from the top or, if desired, by removing the front sheet without removing the sleeve and metal curtains from the cutter section. In the busbar transition between the panels , the expansion of the panel in both directions is easily done on site by using the busbar joining apparatus 

CUTTER SECTION

Medium voltage switching elements (SF 6 or Vacuum Breakers, Vacuum Contactors) and their carrier, the drawer type trolley, is the section where the metal curtains LSC2B / PM (Partical Metal) separating the busbar and breaker sections are located. On request, voltage transformers and MV fuses can be placed on the trolley. The breakers used in cells with the same current can be changed quickly and simply in terms of energy continuity. A curtain movement system has been designed that opens the front of the sleeves so as not to force the movement of the cutter cart in the service position and closes safely when it is taken to the test position. The breaker trolley is always in contact with the main earth of the switchboard via the spring-loaded earth bus . Thanks to the lock , which takes its movement from the soil blade , the soil blade cannot be closed in the service position. Status information of the breaker is carried to the low voltage panel with the socket plug system . The breakers are tested in the panel in accordance with IEC62271-100 and IEC62271-200 standards.

LOW VOLTAGE CONTROL and CONTROL SECTION

It is a section equipped with all kinds of protection relays, control elements and measuring instruments upon request. It is in a grounded metal box in order to prevent damage to personnel and materials in case of an internal failure that may occur in the panel. Control and monitoring materials are designed at a height that can be easily controlled . Connections of transition cables (auxiliary feeds and interlocks) between panels are easily made. Panel mimics are located on the breaker door or low voltage cover and the circuit flow is easily understood.

CABLE SECTION

It is the section where switchgear materials such as different types of current, voltage transformers, epoxy sleeve insulators, earth blade, surge arrester, capacitive insulator that provide passage with the breaker section. In case of change of measurement transformers, installation is fast and easy with its sliding slide structure. The cables are fixed with glands on the base of the enclosure. If the necessary mechanical and electrical interlocks are made/resolved, access to the cable compartment is designed to be accessible from the front and rear , taking into account the dimensions of the building and user convenience . This safety is certified with type IAC:A FLR and IAC:A FL as specified in the IEC62271-200 standard.