Metal Enclosed Cell

blankUp to 36 kV medium voltage switchgears designed for indoor use in secondary distribution systems, compact kiosk type transformer buildings and industrial plants. All functional units that may be required in a switchgear center can be easily installed side by side. The cells, which have been manufactured in the factory and all routine type tests have been completed, can be used safely and commissioned practically in a very short time.

Separation and cutting operations are carried out in SF6 gas environment and the busbars are air insulated. This ensures a safe separation and cutting process and minimizes the dimensions.  modular switchgears are easily and safely used in kiosk type substations with their compact dimensions.

Modular cells consist of 4 main parts. The compartments are separated from each other by a metal body;

1.Cable connection and switching section
2.Busbar section
3.Operating mechanism section
4.Low voltage section

CABLE CONNECTION AND SWITCHING SECTION

The mains cables are connected to the connection terminal under the earthing disconnector. In this section, there are load disconnector, disconnector, circuit breaker and earthing disconnector according to cell type as switching elements. The fused load disconnector assembly includes MV fuses and striker pin transmission mechanism.

The load splitter or disconnector is completely separated from the busbar section and the cable connection section by a sheet metal partition in an epoxy resin housing. Single core cables up to 240 mm can be easily connected to this section.
There are glands and clamps at the cable entries so that the cables can stand upright in the cell. To access this section, the ground disconnector must be closed.

 

BARA DEPARTMENT

When modular cells are installed side by side, the busbar connection between the cells is made with 3 busbars of suitable cross-sections. Access to the busbar section is through the cell top cover.

BUSINESS MECHANICS DEPARTMENT

This section contains the drive mechanism elements of the load disconnector, disconnector, breaker, and earthing disconnectors. Optionally, Disconnector Spring Arming Motor and Earth Disconnector Safety mechanism can be installed in this section according to the line head condition.

LV PANEL SECTION

This section contains terminal blocks, LV fuses, thermostat, measuring instruments and protection relays. While the cell is energized (busbars and cable), operations can be performed in the LV panel.

Basic Locking Systems

The load separator can only be closed when the cell door is closed and the earthing separator is open.
The earthing disconnector can be closed when the load disconnector is open.
The cell door can be opened when the earthing disconnector is closed.
The load separator cannot be closed when the cell door is open.
Optionally, a ground closing interlock can be installed when the cable connected to the input cell is energized. In this way, 3 phase short circuit of the ground is prevented while the cable is energized.

CUTTER CELLS

  • The disconnector and disconnectors (in the coupling cell) can only be opened when the breaker is in the open position.
  • The disconnector or cutter can be locked in the open position.
  • The earth disconnector can only be closed when the disconnector is open.
  • The cell door cannot be closed while the breaker and disconnector are open.
  • The cell door can only be opened: The breaker is locked in the open position, the disconnector is open and the earthing disconnector is closed.

STRUCTURAL FEATURES

HMH series cells are designed in a fully modular structure, taking into account functionality, appearance and safety. Cell carcasses are made of 2mm hot-dip galvanized sheet metal and do not undergo any deformation even in the most humid environments with 275gr / m² galvanized thickness used above the standards.
All epoxy resin parts used in the switchgears (support and capacitive insulators, load separator body, etc.) are produced in the epoxy resin plant within our factory and each product is subjected to relevant tests before entering the main assembly line.

STANDARD AND OPTIONAL ACCESSORIES

Two different types of current transformers are used in the switchgears;

  • Toroid type current transformer
  • Cast resin type current transformer

DIGITAL PROTECTION AND CONTROL RELAYS

Relays with various types of protection, measurement and control features are used in switchgears. The relays selected by considering the customer and project requirements are shipped with the desired set values in our factory. The relays that provide overcurrent and earth protection functions, which are frequently used, are fully compatible with the Ulusoy toroid current transformer and relays of different manufacturers can also be used in our cells upon customer request.

MALFUNCTION INDICATOR ASSEMBLY

Phase and earth fault indicating devices, which are available from various manufacturers and can be mounted in the control panel or in the concrete kiosk, are available as an option with our cells.

MEASUREMENT INSTRUMENTS

The selection of measuring instruments such as ammeters, voltmeters, meters, energy analyzers in our switchgears is also made in line with customer and project requirements .

OG INSURANCE

In our switchgears, MV fuses with high breaking capacity, which are selected according to the transformer power, are used.

REMOTE CONTROL

With the remote control provided as standard in the cells, it is possible to perform the operation on the cell from up to 5 meters away.

BARALAR

The busbars used in the connection of the cells with each other are made of aluminum or copper with high conductivity capacity and insulated with heat shrink tubes.