Design of input the switchgear device of electrical power point for sports complex
Our organization has completed design and installation work on the RU10kV supplying electricity to a sports complex with an aquapark.
DESIGN OF GENERAL POWER DISTRIBUTION UNIT
In this section of the project, the main principal decisions are presented on the issues of power supply of the complex building of the power unit of the object at a voltage of 10 kV. This working documentation has been developed on the basis of: - the customer’s design specification; - architectural and construction plans.
POWER SUPPLY SYSTEM DESIGN
10kV 10kV power supply category from the external network - II. For the reception and distribution of electricity at a voltage of 10 kV, the project provides for a 10 kV switchgear. The switchgear is double-row, four-section, each row consists of two sections with sectional automatic transfer switch. The first row (I, II section) consists of 30 i / v cells, the second row (III, IV section) consists of 18 i / v cells. Busbar system - single row. Busbars are formed by successively connected insulated segments of electrical copper strip. The 10kV power supply system provides for power supply for the I and II sections of the 10kV switchgear along two existing mutually reservable cable lines, and for the 3rd and 4th sections through two new reservable cable lines. There is also the possibility of attaching backup links to existing facility facilities.
POWER EQUIPMENT
RU-10kV is located on the 1st floor of the power unit in a specially organized room. Indoors natural ventilation is provided. The switchgear is completed in / in the UniGear cabinets manufactured by ABB with vacuum switches and is a modular switchgear in a metal sheath for indoor installation. RU-10kV is provided from the following high-voltage cells: - distribution auxiliary needs; - with auxiliary transformers; - with voltage transformers; - introductory; - sectional; - linear (for connecting power transformers); - linear (reserve); High-voltage cabinets are equipped with protection and automation devices. The devices are made on the basis of microprocessor modules manufactured by ABB and embedded in high-voltage cabinets (in the instrument compartments). Protection of RU-10kV elements includes maximum protection of outgoing lines, protection against earth faults, protection of 10kV buses, differential protection of power transformers, protection against inter-turn short circuits, earth faults, etc. Commercial metering of electrical energy is provided for in the input cells of the switchgear.
OPERATING CURRENT SYSTEM
The operating current system provides power to the relay protection and automation devices for the actuators of the switches, control circuits, alarms, etc. As the operating current is used direct current voltage of 220V. To organize the power supply of the operating current circuits, the project provides for charging and powering installations — power supply cabinets for operating busbars (SHUOT) in combination with parallel-connected rechargeable batteries. For each row of 10kV RU, two power cabinets for operative buses (ShUOT-1, ShUOT-2 and ShUOT-3, ShUOT-4) are provided, which are installed in the RU-10kV room next to the auxiliary needs panels of each RU section. . The cabinets are powered via two mutually redundant cable lines from the auxiliary panels of different sections. The rechargeable batteries are placed in rechargeable cabinets, installed next to the power cabinets of operational tires. The installation of the operational current circuits is carried out according to the electrical principal secondary circuits developed by the manufacturer.
ELECTRICITY OF THE NET
T1-T10 KTP-1 - KTP-5 power transformers are connected to the 10kV switchgear (10kV cable lines) by the PvVng-LS power cables with insulation made of cross-linked polyethylene with a reduced fire hazard, power networks to the ShUOTS and to the operating current bushes (cable 0.4kV lines) are performed by power cables of the VVGng-LS brand also with insulation and a sheath of reduced fire risk. Cabling is carried out on cable structures in the basement and is developed in the working documentation.
GROUNDING
The grounding circuit of the power unit is used as the grounding device. In the RU-10kV room, the project provides for an internal protective grounding circuit, made in the form of a trunk of strip steel with a section of 40x4mm, laid at a height of 0.4 m from the floor level around the perimeter of the room. The contour is connected to the protective grounding circuit of the KTP room at two points by welding. As metal grounding lines, all metal structures on which electrical equipment is installed are used. Steel structures are interconnected by a strip steel welding method. The metal enclosures of the equipment are connected to the earth line and must have reliable electrical contact with the earth line structures. Equipment hinges should be connected to the grounding conductor as well. RU-10kV lightning protection is performed in the volume of the entire structure (see arch.). Indoor, 10kV RU made working, emergency and repair lighting and developed in the project section of the brand "EO" arch ..
INSTALLATION INSTRUCTIONS
All installation work must be carried out in accordance with this project, I & P, SNiP, GOST and other guidance documents, and in accordance with the technical and operational documentation for the installed equipment
Project drawings in autocad dwg format will be posted on request.