| Brand | MV Switchgear Accessories |
| Model NO. | GGJ 12kV reactive power cabinet for terminal power supply system |
| Rated voltage | 380V |
| Rated normal current | 63-630A |
| Rated frequency | 50/60Hz |
| Rated capacity | 1-600KVar |
| Series | GGJ |
The GGJ type low-voltage reactive power compensation cabinet is an intelligent energy-saving core equipment suitable for 380V/400V low-voltage distribution systems. It is designed to solve the problem of reactive power loss caused by inductive loads. By dynamically tracking changes in reactive power in the power grid and automatically switching capacitor banks, it achieves precise compensation and is widely used in various scenarios such as industrial production, commercial buildings, and new energy supporting facilities.
Core performance and technological advantages
Intelligent and precise compensation: equipped with a microcomputer intelligent controller, supporting three-phase or phase separation mixed compensation mode, real-time monitoring of power factor and automatic adjustment, can steadily increase to above 0.95, reduce reactive power by more than 60%, significantly reducing line and transformer losses.
Rapid dynamic response: using voltage zero crossing triggering switching technology, response time ≤ 20ms, adapted to fluctuating loads such as motors and welding machines, switching without inrush current or impact, avoiding equipment damage.
Harmonic control capability: Equipped with a 7%/14% reactance rate reactor, it effectively suppresses 3-13 harmonics, resulting in a total harmonic voltage distortion rate of ≤ 5%, in compliance with the GB/T14549 standard, and is suitable for harmonic source scenarios such as frequency converters and photovoltaic inverters.
Comprehensive safety protection: integrating multiple protection functions such as overvoltage, overload, phase loss, and overcompensation. The capacitor adopts a self-healing design, and the residual voltage drops below 50V after 1 minute of power outage, ensuring safe and reliable operation.
Flexible adaptation and expansion: The modular structure supports 1-16 control circuits, with compensation capacity covering 60-600kvar. It can be expanded in parallel with multiple cabinets and is compatible with various low-voltage switchgear such as GGD, MNS, GCK, etc., to meet the needs of different distribution systems.
Applicable scenarios and core values
Industrial field: Suitable for heavy-duty loads such as motors and compressors in factory workshops, mines, and chemical parks, improving the actual load capacity of transformers, extending equipment life, and achieving an annual power saving rate of 5% -18%.
Commercial buildings: Suitable for lighting and air conditioning systems in shopping malls, office buildings, and residential areas, optimizing power supply quality, avoiding voltage fluctuations that affect the electricity experience, and reducing commercial electricity costs.
New energy supporting facilities: Suitable for the low-voltage side of photovoltaic and energy storage power stations, compatible with fluctuating loads, ensuring grid stability, with a power factor stable at 0.98 or above, meeting the requirements for grid connection of new energy generation.
Infrastructure: Serving street lighting, urban and rural power grid renovation, high-rise building power centers, with a compact structure and protection level of IP30/IP40, suitable for wide temperature environments ranging from -25 ℃ to+55 ℃, and easy installation and maintenance.
This product complies with international and domestic standards such as GB/T15576-2008 and IEC60439. It has an RS-232/485 communication interface, supports remote monitoring and fault warning, and achieves unmanned operation. It is the preferred solution for energy-saving and efficiency improvement of low-voltage distribution systems and optimization of power quality.
Electrical data:
Rated voltage: 380VAC 3~; Rated insulation voltage: 660VAC 3~;
Rated frequency: 50HZ or 60HZ;
Compensation method: a combination of three-phase compensation and single-phase compensation.
Compensation capacity: 1-600kvar.
Compensation methods: cyclic switching, coded switching, fuzzy control automatic switching.
Fastest response time: ≤ 20ms;
Cabinet height: 2000mm, 2200mm;
Width: 600, 800, 1000, 1200mm;
Thickness: 600, 800, 1000mm;
Protection level: IP30.
It is ideal for terminal power supply systems such as industrial and mining enterprise substations, residential area distribution networks, commercial building power centers, box-type substation terminals, and rural power grid terminals. It performs exceptionally well in scenarios with frequently changing loads and unstable reactive power.
It mainly realizes three core functions: ① Dynamic reactive power compensation to improve power factor (up to ≥0.95) and reduce electricity fees; ② Harmonic suppression by absorbing harmonic current with special reactors, meeting national harmonic standards; ③ Line loss reduction and transformer load capacity improvement, ensuring stable voltage of terminal power supply systems.
