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GGJ
GGJ Low-voltage switchgear cabinet
The GGJ type low-voltage reactive power compensation switchgear is a specialized complete set of distribution equipment designed specifically for low-voltage distribution systems. It is suitable for distribution scenarios with three-phase AC frequency of 50Hz, rated working voltage of 380V, 660V and below, and is mainly used for reactive power compensation and power factor optimization of distribution systems. This product is designed with energy conservation, precision, stability, and strong adaptability as its core. The main structure is assembled with high-quality steel and integrates core components such as compensation capacitors, reactors, switching switches, and intelligent controllers. The overall layout is scientific and orderly, and can automatically adjust the reactive power compensation capacity according to changes in the load of the distribution system, effectively reducing line losses and improving power supply efficiency. It is a specialized core equipment for achieving energy conservation and reducing consumption in low-voltage distribution systems, and ensuring stable operation of the power grid. It is widely applicable to various low-voltage distribution scenarios such as industrial, civil, and municipal.
Features
1.Intelligent compensation is precise and has significant energy-saving and consumption reducing effects:
equipped with a high-performance intelligent compensation controller, it can monitor the power factor, voltage, current and other parameters of the distribution system in real time, automatically switch the compensation module according to the dynamic changes of the load, achieve accurate compensation of reactive power, avoid overcompensation or undercompensation, effectively improve the system power factor to above 0.95, significantly reduce the power loss of the line, and improve the power supply efficiency of the distribution system.
2.Complete protection configuration, high operational safety and reliability:
built-in multiple protection devices such as overvoltage, undervoltage, overcurrent, harmonic suppression, and capacitor overheating. The reactor and capacitor are precisely matched, which can effectively suppress power grid harmonics, reduce inrush current impact, and avoid component damage due to abnormal working conditions; At the same time, the internal components of the cabinet are separated and laid out, with standardized wiring to reduce the risk of fault linkage and ensure the long-term stable operation of the compensation system.
3.Modular design is flexible and has strong adaptability for expansion:
adopting a modular compensation unit design, each compensation module is independently grouped, and the number of modules can be flexibly configured according to the load capacity and compensation needs of the user’s distribution system. In the later stage, compensation units can also be easily added according to the expansion needs of the distribution system, without the need for large-scale transformation of the cabinet, adapting to different stages of reactive power compensation needs.
4.Easy operation and maintenance, controllable operation and maintenance costs:
The cabinet is equipped with clear operation status indicator instruments and operation buttons, which can intuitively view the operating parameters and working status of the compensation system. Only simple parameter inspections are needed for daily operations; The modular compensation unit is easy to plug and unplug, with strong universality of components. If there is a fault, it can be quickly replaced, greatly reducing the technical threshold and time cost of on-site operation and maintenance, and the full life cycle operation and maintenance cost is low.
5.Strong overall adaptability and compatibility with various distribution scenarios:
The cabinet structure design conforms to the layout requirements of conventional low-voltage distribution rooms, with flexible incoming and outgoing wiring methods, and can seamlessly integrate with various low-voltage switchgear such as GGD and GCS to form a complete distribution system; At the same time, different specifications of reactors can be customized and configured according to the harmonic situation of the distribution system, suitable for various low-voltage distribution scenarios including pure resistance, inductance, capacitance, and harmonics.
Production standards: Strictly follow domestic and foreign specialized standards such as IEC60439-1 “Low voltage switchgear and control equipment”, GB7251.1-2013 “Low voltage switchgear and control equipment – Part 1: Type testing and partial type testing equipment”, GB/T 15576 “Low voltage reactive power compensation device”, etc. Each product undergoes strict electrical performance testing, protection function testing, full cabinet withstand voltage testing and other factory inspections to ensure that compensation accuracy, protection performance and safety performance meet regulatory requirements.
Production process: high-precision CNC equipment is used for sheet metal processing, bending, and assembly. The cabinet frame has high precision and strong rigidity; The surface has undergone phosphating and electrostatic spraying anti-corrosion treatment, with a uniform and dense coating, possessing good anti-corrosion, anti rust, and dust-proof properties, and can adapt to humid and dusty industrial and civilian power distribution environments. The core components are all selected from well-known domestic and foreign brands. The capacitors are self-healing low-voltage parallel capacitors, and the switching switches are made of thyristors or composite switches to ensure the response speed and operational stability of the compensation system.
Customized service: The number of compensation modules, reactor specifications, switching methods, and protection functions can be customized according to the actual parameters of the user’s distribution system, such as rated voltage, compensation capacity, power factor requirements, harmonic content, etc; At the same time, cabinet size, protection level, incoming and outgoing line methods, and intelligent monitoring interfaces can be customized to meet personalized reactive power compensation needs in different scenarios. Provide comprehensive pre-sales on-site survey, scheme design, in sales installation and debugging, after-sales technical guidance, and one-stop service for component replacement to ensure the accurate operation of the compensation system.
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Specification
| Parameter Item | Specification Description |
| Rated voltage | 400V,660V,1000V |
| Rated frequency | 50Hz |
| Rated capacity | 30 – 1000var |
| Operating voltage range | 0.8 – 1.1 Un |
| Capacitor connection mode | Y or △ |
| Measurement error | Voltage:±0.5%,Current:±1%,Reactive power:±1% |
| Switching mode | Automatic switching according to harmonic voltage or power factor |
| Switching delay | Adjustable from 0 – 999s |
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FAQs
What are the core functions of GGJ low-voltage switchgear and what are the differences from conventional low-voltage switchgear?
GGJ switchgear is a specialized reactive power compensation device for low-voltage distribution systems. Its core functions include detecting system reactive power, automatic switching compensation units, optimizing power factor, and reducing line losses; However, conventional low-voltage switchgear such as GGD and GCS mainly focus on power distribution, motor control, and other functions, without dedicated reactive power compensation modules and intelligent control units. GGJ switchgear can be used in conjunction with conventional low-voltage switchgear to form a complete energy-saving low-voltage distribution system.
What is the compensation capacity range of GGJ low-voltage switchgear and can it be adjusted according to the load?
The conventional compensation capacity of this product is 30kvar-600kvar, which can be flexibly configured according to user needs; The intelligent controller equipped can monitor the load changes of the distribution system in real time, automatically switch the corresponding compensation module according to the increase or decrease of the load, and dynamically adjust the compensation capacity to always maintain the system power factor within the optimal range.
How can GGJ low-voltage switchgear suppress grid harmonics and avoid their impact on the compensation system?
GGJ switchgear forms a filtering compensation circuit by accurately matching the parameters of reactors and capacitors, which can effectively suppress the main harmonics such as 3rd, 5th, and 7th in the power grid; At the same time, specialized filtering reactors can be customized according to the harmonic content of the distribution system to reduce the impact of harmonics on capacitors, switching switches, and other components from the source, avoiding damage to components due to harmonic overcurrent and ensuring stable operation of the compensation system.
What are the switching methods and characteristics of GGJ low-voltage switchgear?
There are three conventional switching methods: contactor switching, composite switch switching, and thyristor switching. Contactors have low switching costs and are suitable for scenarios with slow load changes. There is a slight surge during switching; Composite switch switching combines the advantages of contactors and thyristors, with low surge current and moderate cost, suitable for most industrial and civilian scenarios; Thyristors have fast switching response speed, no inrush current, and can achieve stepless compensation, making them suitable for scenarios with frequent load changes and high requirements for compensation accuracy.
Can GGJ low-voltage switchgear achieve intelligent remote monitoring and how to operate it?
This product can reserve an intelligent communication interface, and after installing a communication module, it can be linked with the central control system or mobile phone of the power distribution system to achieve remote monitoring of parameters such as compensation capacity, power factor, voltage, current, and component temperature. At the same time, it can remotely view the equipment’s operating status and fault alarm information. Some models support remote manual switching of compensation units. No need to modify the cabinet structure, only simple wiring configuration is needed to achieve intelligent upgrade.
Related Applications
Industrial plant power distribution system: As a specialized energy-saving equipment for low-voltage power distribution in industrial plants, it is suitable for various small and medium-sized industrial plants such as mechanical processing, light industry manufacturing, furniture production, etc. It is used to compensate for the reactive power generated by the operation of production equipment and optimize the power factor of the power distribution system. The production equipment in industrial plants is mostly inductive load with high reactive power loss. GGJ switchgear can accurately and dynamically compensate, reduce line energy loss and transformer loss, and improve the stability of equipment power supply voltage, avoiding the decrease in production equipment efficiency caused by low voltage and helping the plant achieve energy conservation and consumption reduction.
Distribution of commercial complexes and supermarkets: Suitable for low-voltage distribution systems in commercial complexes such as shopping malls, supermarkets, and shopping centers, used to compensate for reactive power generated by air conditioning, elevators, lighting, refrigeration equipment, etc. Commercial complexes have dense loads and high electricity consumption, and the load dynamically adjusts with changes in passenger flow. GGJ switchgear can automatically adjust compensation capacity according to load changes, effectively improving the power supply efficiency of the distribution system, reducing the overall electricity cost of the mall, while ensuring the stable operation of core equipment such as air conditioning and elevators, and enhancing the commercial operation experience.
Residential community power distribution system: adapted to the low-voltage distribution room of residential communities, used to compensate for the reactive power generated by public facilities such as elevators, water pumps, lighting, charging piles, and residential electricity in the community. The electricity load of residential communities has the characteristic of large differences between peak and valley. The rush hour in the morning and evening is the peak electricity consumption period, and the late night is the low electricity consumption period. The GGJ switchgear can dynamically switch the compensation module according to the changes in peak and valley loads to avoid overcompensation or undercompensation, improve the power supply efficiency of the community’s distribution network, reduce power line losses, and ensure stable power supply to public facilities in the community.
Municipal public venue power distribution: Used for low-voltage power distribution systems in public venues such as sports halls, libraries, municipal office buildings, hospitals, etc., as dedicated reactive power compensation equipment, to ensure that the power factor of the venue power distribution system meets the standard. Public venues have extremely high requirements for power supply stability and safety. GGJ switchgear is equipped with multiple protection devices, which can effectively avoid abnormal working conditions such as overvoltage, undervoltage, and overcurrent. At the same time, precise reactive power compensation can improve the quality of power supply voltage and ensure the stable operation of core facilities such as lighting, air conditioning, medical equipment, and office equipment in the venue.
Distribution of Logistics Warehousing and Cold Chain Distribution Centers: Suitable for low-voltage distribution systems in logistics warehousing parks and cold chain distribution centers, used to compensate for reactive power generated by equipment such as shelf lighting, conveying equipment, refrigeration units, forklift charging stations, etc. The logistics warehousing and cold chain center has multiple electrical equipment and long load duration. The refrigeration unit is a typical inductive load with significant reactive power loss. The GGJ switchgear can achieve precise compensation of reactive power, reduce power loss in the distribution system, and improve the power supply stability of the refrigeration unit, ensuring constant temperature in the cold chain warehousing and helping the logistics warehousing center achieve energy-saving operation.
