general description
Closed switchgears in mobile block-container buildings for voltage 6, 10 kV (hereinafter ZRU-6 (10) kV) are designed for receiving and distributing electrical energy of three-phase alternating current of industrial frequency 50 Hz in mining, oil and gas and industrial facilities.
ZRU-6(10) kV consist of separate block containers with complete switchgear installed in them from cabinets of the K-02 series, or chambers of the KSO-203, KSO-203M, KSO-210 series. Block containers are delivered separately by road or rail to the installation site, where they are connected to each other, electrical installation and commissioning work is carried out.
ZRU-6(10) kV is manufactured according to a questionnaire compiled for each customer individually, with detailed design of the main and additional equipment, taking into account all the customer’s wishes.
Modular type indoor switchgear are manufactured in two versions:
- Standard marine metal containers of various types and sizes, designed for operation in conditions of external temperatures from - 60 ° C to +40 ° C and protecting equipment from external environmental factors.
- Typical block concrete modules of the "Baltika" type, designed for operation in conditions of external temperatures from - 60 ° C to +40 ° C and protecting equipment from external environmental factors.
Closed switchgears (SGD) are manufactured for voltages of 6-10 kV and can be equipped with Onega KSO cells or Volga switchgear cabinets produced by OJSC PO Eltekhnika.
Types and equipment of closed switchgear (KRUN)
The Chelyabinsk Electrical Equipment Plant produces two types of closed switchgear ZRU-6(10) :
- with distribution devices from assembly chambers KSO-203, KSO-203M, KSO-210 (with withdrawable elements);
- with distribution devices from cabinets of the K-02 series. The substation housing is made depending on the area of operation.
The frame of the closed switchgear is assembled from a metal profile, with the base being a pipe and a channel covered with corrugated sheet metal. The entire structure is reliably boiled, after which the product is sent for painting. Then the frame is sheathed with a profiled sheet, the type of which corresponds to the climatic design. For the production of insulated block containers, sandwich panels are used, thanks to which, with the help of heaters inside the room, the temperature necessary for the operation of electrical equipment is maintained.
ZRU-6(10) may be equipped with heating, 220V lighting, 36V portable lighting, a fire alarm system, a burglar alarm, an air conditioning and ventilation system, an equipment maintenance corridor with two entrances and external repair doors.
The closed switchgear is equipped with the following electrical equipment:
- distribution device from chambers KSO-203;
- KSO-203M with power vacuum circuit breakers;
- KSO-210 with power vacuum circuit breakers on withdrawable elements;
- cabinets of the K-02 series with power vacuum circuit breakers installed on withdrawable trolleys;
- ShSN auxiliary cabinet;
- power supply for relay protection devices;
- operating current control cabinet;
- electricity metering panel of the control room.
Not only technical requirements and solutions are agreed with the customer, but also a multi-color shell color scheme that is adaptive to the installation site, application of individual logos, etc. All internal and external metal surfaces of the equipment are coated using powder polymerization, regardless of color. The coating has increased resistance to all known types of external influences and, under normal use, can last for as long as possible.
ZRU-6(10) kV in terms of the impact of environmental climatic factors according to GOST 15150-69 belong to the UHL climatic design of placement category 1 and are operated in the following conditions:
- installation height above sea level is not more than 1000 m;
- ambient temperature from minus 60°С to plus 40°С;
- atmosphere type I-II according to GOST 15150-69;
- degree of insulation contamination I-II according to GOST 9920-89
Types and equipment of closed switchgear
The Perm Electrotechnical Plant, an electrical equipment plant, produces two types of closed switchgear ZRU-6(10):
- with distribution devices from assembly chambers KSO-203, KSO-203M, KSO-210 (with withdrawable elements);
- with distribution devices from cabinets of the K-02 series. The substation housing is made depending on the area of operation.
The frame of the closed switchgear is assembled from a metal profile, with the base being a pipe and a channel covered with corrugated sheet metal. The entire structure is reliably boiled, after which the product is sent for painting. Then the frame is sheathed with a profiled sheet, the type of which corresponds to the climatic design. For the production of insulated block containers, sandwich panels are used, thanks to which, with the help of heaters inside the room, the temperature necessary for the operation of electrical equipment is maintained.
ZRU-6(10) may be equipped with heating, 220V lighting, 36V portable lighting, a fire alarm system, a burglar alarm, an air conditioning and ventilation system, an equipment maintenance corridor with two entrances and external repair doors.
The closed switchgear is equipped with the following electrical equipment:
- distribution device from chambers KSO-203;
- KSO-203M with power vacuum circuit breakers;
- KSO-210 with power vacuum circuit breakers on withdrawable elements;
- cabinets of the K-02 series with power vacuum circuit breakers installed on withdrawable trolleys;
- ShSN auxiliary cabinet;
- power supply for relay protection devices;
- operating current control cabinet;
- electricity metering panel of the control room.
Not only technical requirements and solutions are agreed with the customer, but also a multi-color shell color scheme that is adaptive to the installation site, application of individual logos, etc. All internal and external metal surfaces of the equipment are coated using powder polymerization, regardless of color. The coating has increased resistance to all known types of external influences and, under normal use, can last for as long as possible.
ZRU-6(10) kV in terms of the impact of environmental climatic factors according to GOST 15150-69 belong to the UHL climatic design of placement category 1 and are operated in the following conditions:
- installation height above sea level is not more than 1000 m;
- ambient temperature from minus 60°С to plus 40°С;
- atmosphere type I-II according to GOST 15150-69;
- degree of insulation contamination I-II according to GOST 9920-89
Scope, definitions
4.2.1. This chapter of the Rules applies to stationary switchgears (RU) and transformer substations (TS) of alternating current voltage above 1 kV.
4.2.2. This chapter does not contain requirements for the design of switchgear and substations in terms of:
- site selection (except 4.2.35);
- engineering preparation of the territory;
- measures to reduce noise generated by operating electrical equipment;
- determining the explosion and fire hazard categories of premises;
- determining the degree of fire resistance of buildings (except 4.2.117, 4.2.118);
- security measures;
- fire protection and fire safety (except for some items).
According to the above, you should be guided by the requirements of current building codes and regulations and departmental documents.
4.2.3. The definitions of the basic concepts used in this chapter are adopted according to current standards, as well as according to 4.2.4 - 4.2.16.
4.2.4. Switchgear (RU) is an electrical installation that serves to receive and distribute electricity and contains switching devices, busbars and connecting buses, auxiliary devices (compressor, battery, etc.), as well as protection, automation, telemechanics, communication and measurement devices.
Open switchgear (OSD) - switchgear, all or the main equipment of which is located in the open air.
Closed switchgear (SGD) is a switchgear whose equipment is located indoors.
4.2.5. Complete switchgear - switchgear, consisting of cabinets or blocks with built-in devices, measuring, protection and automation devices and connecting elements (for example, conductors), supplied assembled or fully prepared for assembly.
Complete gas-insulated switchgear (GIS) - a switchgear in which the main equipment is enclosed in shells filled with SF6 gas, which serves as an insulating and/or arc-extinguishing medium.
A complete switchgear intended for indoor installation is abbreviated as KRU, and for outdoor installation - KRUN. A type of switchgear is KSO - a prefabricated one-way service chamber.
4.2.6. Transformer substation is an electrical installation designed for receiving, converting and distributing energy and consisting of transformers, switchgear, control devices, technological and auxiliary structures.
4.2.7. Attached substation (RU) - a substation (RU) directly adjacent to the main building of a power plant or industrial enterprise.
4.2.8. Built-in substation (RU) - substation (RU) occupying part of the building.
4.2.9. Intra-shop substation (RU) - a substation (RU) located openly inside the workshop (without fencing), behind a mesh fence, in a separate room.
4.2.10. Complete transformer substation (KTP) - a substation consisting of transformers, units (switchgear and switchgear switchgear) and other elements supplied assembled or fully prepared at the manufacturer for assembly.
4.2.11. Pole transformer substation (STP) is an open transformer substation, all the equipment of which is installed on a single-post overhead line support at a height that does not require substation fencing.
Mast transformer substation (MTS) is an open transformer substation, all the equipment of which is installed on structures (including two or more overhead line support posts) with a service platform at a height that does not require substation fencing.
4.2.12. Distribution point - 6-500 kV switchgear with equipment to control its operation, not part of the substation.
4.2.13. Sectioning point is a point designed for sectioning (with automatic or manual control) a section of 6-20 kV lines.
4.2.14. A chamber is a room intended for the installation of devices, transformers and buses.
A closed cell is a cell that is closed on all sides and has solid (not mesh) doors.
A fenced chamber is a chamber that has openings protected in whole or in part by non-solid (mesh or mixed) fences.
4.2.15. Biological protection is a set of measures and devices to protect people from the harmful effects of electric and magnetic fields.
4.2.16. An auxiliary building (ABU) is a building consisting of premises necessary for organizing and carrying out maintenance and repair work on substation equipment.
