Tansformer substation of kiosk type
КТП with power from 25 to 2500kVA are designed for:
- receiving and transferring (or reserve receiving), transformation and distribution of the electricity of three-phase alternating current with frequency 50 Hz and voltage 6(10)/0,4 kV;
- implementation of automatic functions;
- protection and control of the low-voltage lines;
- supply with three-phase alternating current of small districts, as well as local objects and separate buildings in the regions with moderate climate (from -40 °C to +40 °C).
КТП is an indoor all-metal chamber manufactured in a form of the load-bearing carcass covered with the panels of thick sheet steel with the thickness of 2 mm. There are doors on every side. All doors have the inner locks for a special key and loops for the outer check-locks. Inside there is a compartment for УВН with switching devices 10(6) kV, compartment for РУНН with the control panel, power transformer compartment, open jumpers 0,4 and 10 kV. For the inspection of the protection devices and contact groups of BB (high voltage) disconnectors without killing, there are viewing windows on the technologic doors of the lead-in cells. In the РУНН compartment, there is a lead-in knife switch placed in a separate chamber, current transformers, collecting busbars, to which automatic breakers (or any other switching devices) of the outgoing lines, protection, accounting and control equipment, external lighting and auxiliaries are connected.
In the КТП with the air lead-in of the power from 160 kVA to 400 kVA, BB disconnectors of the inner devise are stationary placed, at the higher power the load breaker is installed. КТП with the power less than 160 kVA are completed with the BB line disconnector of the outside unit with drive (on the order of the Customer). In the КТП with the cable lead-in up to 400 kVA, BB disconnectors of the inside device are stationary placed. Standard packaging arrangement includes the high voltage switching devices.
General industrial design equipment
On the covers of КТПof the air/air type, technological holes are provided for installation of the cabinets of the receiving devices BH and there are also brackets attaching points for the connection of the air lines of 0,4 kV. Wires for the connection to the air lines of 0,4 kV are placed on the walls of РУНН compartment in special boxes. Accounting of the active energy consumption is carried out on the busbars of 0,4 kV after the lead-in knife switch (it is possible to install the meters for the accounting of the reactive energy, electronic counters and two-rate meters). In low temperature conditions, the warming of the electricity supply meter is provided. КТП has got mechanical and electric blockings in accordance with ПУЭ requirements. All КТП are completed with the equipment of general designation. In all cases, complete equipment has got quality certificates.
Range of КТП application – electricity supply systems of the industrial enterprises, agricultural consumers, residential settlements and objects of the oil and gas production industry, etc.