Views: 0 Author: Zhejiang Shilong Electric Technology Co., Ltd Publish Time: 2022-01-04 Origin: Site
Feasibility report on low-voltage distribution system equipment integration project
At the 75th UN General Assembly, Chinese President Xi Jinping said that China will take more powerful policies and measures to peak its carbon dioxide emissions by 2030 and strive to achieve "carbon neutrality" by 2060.The state then put forward the 3060 target, which refers to tackling climate change and to promote greenhouse gas emissions based on carbon dioxide. During the implementation of the 3060 target, China's energy layout will be bound to undergo major changes.
In today's field of power generation, clean energy such as wind power and optoelectronics are continuing to develop, important auxiliary sectors of power systems such as energy storage in the distribution field are also expanding rapidly, and the energy pattern is constantly changing. Whether it is traditional energy, new energy or energy storage, all need distribution work through low-voltage distribution system equipment, so the huge market changes have brought huge future consumption market and business opportunities to low-voltage distribution system equipment.
The continuous improvement of power requirements for power users, and the diversification of power system access make the system scale larger and more complex.
This company concentrates on the latest technique in these applications :
1. Fixed type installation (most of the three boxes are of fixed type) especially take the cable branch box as an example )
Isolation switch inlet line, and small capacity molded case (400A and below) outlet.The entry and exit mode of the box is generally down in and out, entry line switches and all multiple exit line switches and installed.The incoming line switch is the lower input line, the upper connection end is short connected through the transition row and the bus line; the outgoing line switch is the upper input line, and the upper connection end is short connected through the transition row and the bus line.Because the situation of each distribution circuit under actual conditions, the traditional complete set of methods is to set the bus and all transition rows according to the project, cutting, bending, empty, adding insulation sleeve or insulation tape, the process is complicated and repeated, very low efficiency and easy-prone, once the error copper scrap loss is large.In order to reduce the cost, most of the small and medium-sized complete set of companies will reduce the length of the transition row, so that the distance between the circuit breaker to the bus is less than the flying arc distance of the circuit breaker (the alternate partition can not be installed or bent installation), causing great short circuit risks, very dangerous.
As can be seen from the above picture, the design and development of new low-power distribution integrated equipment is extremely valuable.The research and development of this product can significantly save resources and improve the competitiveness of the product industry, and promote the technological progress of complete sets of industries, save energy and reduce materials, and realize complete sets of standardized solutions.
Alignment of the overall performance indicators of the low power distribution integrated system equipment:
Model | Fixed-type cable branch box | Domestic and foreign mainstream product indicators |
Housing frame grade rated current Inm(A) | 630 | 630 |
rated current In(A) | 630 | 630 |
Rated operating short-circuit breaking capacity Icu (kA) | 50 | 50 |
Rated limit short-circuit breaking capacity Ics(kA) | 50 | 50 |
Volume | 60%-80% | 100% |
Zero flying arc | real zero flying arc, no alternate partition, a complete set of cabinet flying arc is safe and reliable | It can not reach the real zero flying arc, but also need to increase the volume of the large volume flying arc cover, a complete set of cabinet flying arc risk |
Low temperature rise | complete set to the busbar points are less, only one | complete set to the busbar points, at least 2. |
material saving | Complete sets of copper consumables are reduced by 10-20% | none |
The performance index alignment of the supporting core components (circuit breaker):
Model | M-125 | domestic and foreign mainstream product indicators |
Housing frame grade rated current Inm(A) | 125 | 125 |
Rated Current In(A) | 125 | 125 |
Rated impact pressure resistance Uimp(kV) | 12 | 8 |
power frequency withstand voltage U (one minute) (V) | 3500 | 3500 |
DC type extreme string （P） | 3 | 4 |
nominal insulation voltage；rated insulation voltage Ui (V) | AC1140V | AC800V |
rated operational voltage Ue (V) | 1500V (τ=5ms) | 1500V (τ=5ms) |
Rated operating short-circuit breaking capacity Icu (kA) | 70 | 50 |
Rated limit short-circuit breaking capacity Ics (kA) | 100 | 70 |
Volume (length X width X height) | 213X92X159 There is no need for alternate panels | 250X92X83 (Length of 100mm alternate partition) |
Zero flying arc | Real zero flying arc, no alternate partition, a complete set of cabinet flying arc is safe and reliable | It can not reach the real zero flying arc, but also need to increase the volume of the large volume flying arc cover, a complete set of cabinet flying arc risk. |
Low temperature rise | Complete set to the bus connection points are less, only one | complete sets to bus connection points, up to 5 cabinets, at least 2 cabinets |
The research for low voltage distribution integration at home and abroad, because in the current mainstream at home and abroad low-voltage distribution market, complete sets of production is concentrated in the factory, low voltage components production is concentrated in components manufacturers, belongs to the upstream and downstream business relationship, the relationship between suppliers and customers, is often non-standard scheme, according to the design institute electrical schematic customization development, so it is often difficult to form and standardize low voltage components very high research and development of highly integrated scheme. Looking at domestic and foreign brands, even the first-line highly standardized design cabinets of the three major international brands, such as: ABB's MSN3.0, Schneider's Blockset, Siemens 8PT, etc., their research and design and the mainstream low-voltage electrical products of their respective brands are independent of each other.This independent design of complete sets and low voltage components (explained in the typical scheme of plastic shell circuit breaker) causes the complexity and waste of the current design of complete system structure, and the low distribution integration scheme will greatly optimize the system scheme in all aspects.illustrate:
