small substations using HXGN-12 high-voltage switchgear
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small substations using HXGN-12 high-voltage switchgear
The following is a detailed introduction to :
### Application Scenarios - **Urban Distribution Network**: In areas such as residential communities, commercial centers, and industrial parks in cities, the small substations with HXGN-12 high-voltage switchgear can serve as terminal substations. They can step down the electrical energy with a voltage level of 10 kV or higher and then distribute it to users, meeting the urban electricity demand. They are characterized by a small footprint and strong environmental adaptability.
- **Internal Power Supply for Industrial and Mining Enterprises**: There are usually a large number of electrical equipment inside industrial and mining enterprises, which have high requirements for the reliability and safety of power supply. The small substations with HXGN-12 high-voltage switchgear can flexibly configure the capacity of transformers and switchgear according to the power load and power supply requirements of enterprises, providing stable power supply for enterprises.
- **Temporary Power Supply Requirements**: In some temporary large-scale event venues, such as sports stadiums, concert sites, etc., or during the emergency repair and renovation of the power system, the small substations with HXGN-12 high-voltage switchgear can be used as temporary substations. They can quickly connect to the power grid and provide emergency power support on site.
### Design Schemes - **Design of Main Electrical Wiring**: Usually, the sectionalized single-bus or double-bus wiring mode is adopted to improve the reliability and flexibility of power supply. For substations with a smaller load, the single-bus wiring mode can also be adopted.
- **Transformer Selection**: According to the load capacity and power supply range of the substation, select transformers with appropriate capacity and transformation ratio. Common transformer capacities include 315 kVA, 500 kVA, 630 kVA, etc.
- **Configuration of HXGN-12 High-Voltage Switchgear**: According to the functional requirements of the substation and the main electrical wiring scheme, reasonably configure the quantity and types of HXGN-12 high-voltage switchgear, which generally include incoming line cabinets, metering cabinets, PT cabinets, outgoing line cabinets, etc.
### Key Points of Operation and Maintenance - **Routine Inspection**: Regularly inspect the substation, check whether the appearance, indicator lights, instruments, etc. of the HXGN-12 high-voltage switchgear are normal, and whether there are abnormal situations such as strange smells and noises; check whether the oil temperature, oil level, and sound of the transformer are normal; check whether the cable joints are overheated or loose, etc.
- **Regular Maintenance**: Conduct regular maintenance on the HXGN-12 high-voltage switchgear, including cleaning the cabinet body, checking whether the connections of electrical components are loose, replacing aging components, etc.; conduct regular maintenance on the transformer, including taking oil samples for testing, checking whether the core grounding is good, and carrying out preventive tests, etc.
- **Fault Handling**: When a fault occurs in the substation, it should be dealt with in a timely manner. First, it is necessary to judge the approximate location and cause of the fault according to the fault phenomenon and alarm information, and then take corresponding measures to repair it.
### Advantages and Disadvantages - **Advantages**: The HXGN-12 high-voltage switchgear has the characteristics of small size and compact structure, which can effectively save the floor area of the substation. It adopts a metal-enclosed structure with a high protection level, which can effectively prevent personnel from misoperating and the impact of the external environment on the equipment. The layout of internal electrical components is reasonable, with good insulation performance and high reliability.
- **Disadvantages**: The rated current and short-circuit breaking current of the HXGN-12 high-voltage switchgear are relatively limited, and it may not be very suitable for application scenarios with large capacity and high short-circuit current. It has certain requirements for the temperature, humidity and other conditions of the operating environment. In harsh environments, special protective measures may need to be taken. The price of the equipment is relatively high, and professional technicians and equipment are required for later maintenance, and the maintenance cost is also relatively high.
