1、 Product Overview

As the name suggests, high and low voltage distribution cabinets are distribution equipment used in power supply systems for energy distribution, control, metering, and cable connection. Generally, power supply bureaus and substations use high voltage switchgear,
Then, the low-voltage side of the transformer is stepped down and led out to the low-voltage distribution cabinet. The low-voltage distribution cabinet is connected to various power distribution panels, control boxes, and switch boxes. Inside, some switches, circuit breakers, fuses
A power distribution device that integrates protective devices such as buttons, indicator lights, instruments, and wires to meet the design functional requirements. Commonly known as high and low voltage switchgear or complete sets of high and low voltage electrical equipment.

2、 Model and meaning

3、 Normal usage conditions

1. The altitude shall not exceed 1000m.

2. Environmental temperature: -25 ℃~400 ℃.

3. Relative humidity: The daily average is not greater than 95%, and the monthly average is not greater than 90%.

4. Installation location: A place without fire, explosion hazards, conductive dust, corrosive chemical gases, and severe vibrations. If the above conditions are exceeded, users can negotiate with our company.

4、 Purpose:

This series is widely used in urban power grid renovation, residential communities, high-rise buildings, industrial and mining areas, hotels, shopping malls, airports, railways, oil fields, docks, highways, as well as temporary power facilities and other indoor and outdoor places.

5、 High voltage side

6、 Low voltage side

7、 Transformer

8、 Execution standards

9、 Technical parameters

Technical parameters of load switch

Technical parameters of high-voltage fuses

11、 Installation, use and maintenance

In addition to the various regulations required by the Ministry of Electric Power for installation, acceptance, handover testing, operation, and maintenance of intelligent integrated substations, the following matters should also be noted:
1). Users should carefully inspect the goods according to relevant regulations when receiving them. For products that are not installed immediately, they should be stored in appropriate places according to normal usage conditions.
2) The product should be lifted from the bottom using specialized lifting equipment.
3) The product is horizontally placed on a pre made foundation, and then the gap between the product base and the foundation is sealed with cement mortar to prevent rainwater from entering the cable room. It enters through the bottom sealing plate of the high and low voltage rooms
High and low voltage cables.
4). After the product is installed in place, reliable grounding should be done; The two main grounding terminals on the channel steel of the power station base, the neutral point and shell of the transformer, and the lower pile head of the lightning arrester should all have installed grounding, and all grounding should be installed separately
A set of grounding devices should be shared, with a grounding resistance of less than 4 ohms. The grounding leads from the grounding grid to this product should be less than 2.
5). After installation or maintenance, the product should undergo the following inspections and tests before being put into operation:
(1) Is the substation clean;
(2) Is the operating mechanism flexible
(3) Whether the on/off of the main electrical appliances is flexible and reliable;
(4) Is the electrical auxiliary contact reliably prepared for on/off;
(5) Whether the meter and relay actions are accurate and correct;
(6) Whether the changes and wiring polarity of instruments and transformers are correct;
(7) Are all electrical installation nuts tightened and installed securely and reliably;
(8) Whether the busbar connection is good, and whether the supporting insulators and clamps are installed reliably;
(9) Whether the setting value of the electrical appliance meets the requirements and whether the specifications of the fuse core are correct;
(10) Whether the contacts of the main circuit and auxiliary circuit meet the requirements of the electrical schematic diagram.
6). maintenance
(1) All components in the product are maintained according to their respective technical requirements;
(2) If the selected transformer is oil immersed, oil sample analysis and inspection should be conducted at least once a year according to specifications;
(3) After 20 times of on load or 2000 times of off load opening and closing operations, the contact condition and the degree of loss of the arc extinguishing device should be checked for high-voltage switching equipment in operation. If any abnormalities are found, they should be repaired or replaced immediately.
(4) The reason for the automatic tripping of low-voltage switchgear must be resolved before it can be put back into operation;
(5) A preventive test should be conducted before the rainy season each year
The product comes with a packing list, certificate of conformity, installation and use instructions, electrical wiring diagram, and instructions for the main components and equipment used in this product, as well as key operation tools and spare parts provided according to the agreement.

12、 Substation Layout Plan

13、 Ordering Notice