These are the medium voltage switchgears designed for use in secondary distribution systems up to 40,5 kV, in compact kiosk type transformer substations, in industrial facilities and indoor spaces. All functional units which may be required in a switching and distribution centre can be easily installed side by side. By safely using the Switchgears which are produced in the factory with all routine and type tests conducted, they can be commissioned in a very short period – practically.

Isolating and breaking processes are carried out in SF6 gas environment and the busbars compartment in air. Thanks to this, a safe isolating and breaking process is ensured and dimensions have been minimised.modular Switchgears, due to their compact dimensions, can be easily and safely used in kiosk type transformer stations.

modular Switchgears consist of 4 main compartments

Cable connection and switching section
Busbar section
Operating mechanism section
Low voltage section
CABLE CONNECTION and SWITCHING SECTION

Network cables are connected to the connection terminal located under the earthing switch. In this section, load break switch, switch disconnector, circuit breaker and earthing switch are located the as the switching element depending on the cubicle type. MV fuses and striker pin transmission mechanisms are located in fuse-switch combination.

Switch disconnector or Load Break Switch within the epoxy resin frame has been completely separated from the busbar section and cable connection section by means of a sheet metal plates..Single -core cables up to 240 mm can easily be connected to this section.

Sleeves and braces are present at the cable entrance in order to allow the cables to stand firm inside the cubicle. The earthing switch must be closed in order to access this section.



BUSBAR SECTION

When the modular Switchgears are installed side by side, the busbar connection between the Switchgears is conducted by 3 pieces of busbars with proper sections. Access to busbar section is provided through the top cover of the cell.

OPERATING MECHANISM SECTION

In this section, switch disconnector and/or load break switch, driving mechanism elements of the earthing switch exist. Optionally, this part can be installed with motorised spring charging system.

LV BOARD SECTION

This section contains terminal blocks, LV fuses, thermostat, measuring instruments and protection relays. When the cubicle is energised (busbars and cable) processes can be performed in LV board.

Basic Interlocking Systems

LBS can be closed only when the cell gate is closed and grounding isolator is open.
Earthing Switch can be closed when the LBS is open
Cubicle door can be opened when the earthing switch is closed.
LBS can not be closed when the cubicle door is open.

Switchgears with Circuit Breakers;

LBS (in the coupling cubicle) can be opened only when the breaker is in on position.
LBS or breaker can be locked in ON position.
Earthing Switch can only be closed when it is open.
Cubicle door can not be closed when open.
Cubicle Door can be opened only if the breaker is locked in ON position, if the LBS is open and the earthing switch is not closed.

STRUCTURAL PROPERTIES

Switchgears have been designed under complete modular structure, in consideration of functionality, appearance and security features. Cubicle carcasses are manufactured of 2mm hot dip galvanized sheet metal and with its galvanise thickness of 275gr/m² which is above the industry standards, it is not subject to any deformation even under the most damp mediums.

In all epoxy resin parts used in Switchgears (support and capacitive isolators, switch disconnector frame etc.) are produced in the epoxy resin facility inside our factory and each is subjected to the relevant tests prior to entering in main switchgear assembly line.

STANDARD and OPTIONAL ACCESSORIES

Toroidal type current transformer

-Cast resin type current transformer

DIGITAL PROTECTION AND CONTROL RELAYS

In Switchgears various types of relays are used with various

protection, measurement and control properties. In consideration of the

Customer and Project requirements, the selected relays are dispatched

from our factory with the desired set values. The PNC PAC E-100 relay

which is frequently used and which offer 50 & 51 over current and ground

protection functions, operate in full compliance with Ulusoy toroidal

current transformers and in line with the customer demands, the relays of

different manufacturers can also be used in our Switchgears.

LINE FAULT INDICATORS

The devices supplied from various manufacturers which can be

mounted into control board or concrete kiosk in order to indicate the

phase and ground faults are offered optionally with our Switchgears.

METERING INSTRUMENTS

The selection of the metering instruments in our Switchgears, such as

ammeter, voltmeter, gauge, energy analyser is made in line with the

customer and project requirements.

MV FUSES

In Switchgears, high breaking capacity MV fuses are

used, after being selected as per the transformer power.

REMOTE CONTROL

By means of the remote control which is offered in

Switchgears as default, it is possible to remote control the operation on the cell from up to 5 meters.

BUSBARS

The busbars which are used for connection of the Switchgears with

each other are manufactured from high conductivity aluminium or copper and insulated with heat-shrink tubes.