GGJ-Type Low-Voltage Reactive Power Compensation Cabinet
The GGJ-type low-voltage distribution reactive power compensation integrated cabinet is a new-generation outdoor distribution cabinet designed based on the principles of safety, economy, rationality, and reliability. It is suitable for urban and rural grid renovations, industrial and mining enterprises, street lighting systems, residential communities, and other AC 50Hz distribution systems with a rated voltage of 380V. This innovative outdoor integrated distribution box integrates multiple functions, including power distribution, control, protection, reactive power compensation, and energy metering. Additionally, it can be customized with leakage protection features according to user requirements. The product boasts several advantages, such as a novel and well-organized design, high protection ratings, and convenient installation, commissioning, maintenance, and repair processes. Moreover, it complies with standards GB7251.12-2013 and GB/T15576-2008, and has successfully obtained 3C certification, making it an ideal low-voltage complete set of equipment for current grid renovation projects. The GGJ series outdoor distribution reactive power compensation integrated cabinets are specifically designed for applications involving power distribution, metering, protection, and automatic reactive power compensation at a voltage level of 0.4kV.
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Low-Voltage Reactive Power Compensation Device
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GGJ-type Low-Voltage Reactive Power Compensation Cabinet
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GGJ-Type Low-Voltage Reactive Power Compensation Cabinet
Detailed introduction
GGJ Low-Voltage Reactive Power Compensation Cabinet
I. Product Overview
The GGJ-type low-voltage distribution reactive power compensation integrated cabinet is a new-generation outdoor distribution reactive power compensation unit designed based on the principles of safety, economy, rationality, and reliability. It is suitable for urban and rural power grid renovations, industrial and mining enterprises, street lighting systems, residential communities, and other applications in AC 50Hz distribution systems with a rated voltage of 380V. This innovative outdoor integrated distribution box integrates multiple functions, including power distribution, control, protection, reactive power compensation, and energy metering. Additionally, it can be customized with leakage protection features according to user requirements. The product boasts several advantages, such as a novel and well-organized design, high protection ratings, and convenient installation, commissioning, maintenance, and repair processes. Compliant with standards GB7251.12-2013 and GB/T15576-2008, the product has also successfully obtained 3C certification, making it an ideal low-voltage complete set of equipment for current power grid upgrades.
The GGJ series outdoor distribution reactive power compensation integrated cabinet is suitable for power distribution, metering, protection, and automatic reactive power compensation at a 0.4kV voltage level.
II. Product Features
The GGJ series low-voltage reactive power compensation cabinets consist of a cabinet body, isolating switch, fuse, composite switch regulator (capacitor switching contactor), thermal overload relay, power capacitors, and an intelligent reactive power compensation controller. The cabinet features a closed-type design.
III. Main Performance
1. Responsive and swift action, excellent compensation performance, and reliable operation—plus, an earth-leakage circuit breaker can be added according to user requirements.
2. Protection functions: Overvoltage, overload, undervoltage, undercurrent, short circuit, and more
3. Operating Modes: Features both automatic and manual operation modes.
4. Can improve the power factor of the grid to 0.95 or higher
IV. Operating Conditions
1. Ambient temperature: -20℃ to +50℃
2. Relative humidity of air: ≤90% (at a relative ambient temperature of 20°C to 25°C)
3. Altitude: Not exceeding 2500m
4. Environmental Conditions: Suitable for indoor installation (within the enclosure), but not appropriate for locations with fire hazards, explosion risks, severe contamination, chemical corrosion, or intense vibrations.
5. Installation Location: The tilt angle relative to the ground should not exceed 5º.
V. Technical Specifications:
1. Rated operating voltage Ue: AC380V; rated insulation voltage Ue: AC660V; rated frequency: 50Hz.
2. Compensation Method: A combination of three-phase and single-phase compensation.
3. Compensation capacity: 420 kvar to 60 kvar.
4. Compensation methods: Cyclical switching, coded switching, and fuzzy-control-based automatic switching.
5. Control parameter: Reactive power or reactive current
6. Fastest Response Time: ≤20ms
6. Installation and Debugging
1. Pre-installation Inspection
Check whether the equipment is intact and undamaged, and verify that all accompanying documentation and accessories are complete. If any issues are found, contact the manufacturer promptly.
2. Pre-energization Checks and Experiments
After the product is installed and before it is put into operation, the following items must be inspected and tested.
1) Check whether the cabinet interior is dry and clean.
2) Whether the operating mechanism of electrical components is flexible—there should be no sticking, jamming, or excessive operating force.
3) Whether the switching of main electrical components is reliable and accurate, and whether the switching of auxiliary contacts is reliable and accurate.
4) Verify whether the instrument indications match the transformer ratio and polarity correctly.
5) Ensure that the busbar connections are secure, and verify that its insulation supports, mounting components, and accessories are firmly and reliably in place.
6) Use a 500V megohmmeter to measure the insulation resistance, which must not be lower than 10 megohms. Before performing the measurement, disconnect electronic devices, capacitors, and current-consuming components such as coils.
3. Power-on Debugging
Commissioning of the Reactive Power Automatic Compensation Controller
The controller's factory-set input, cut-in threshold, delay time, and overvoltage threshold have already been calibrated according to relevant standards. If you need to readjust them, please follow the operating instructions for the reactive power automatic compensation controller.
7. Usage and Maintenance Precautions
1) The operation, maintenance, and repair of this product must be performed by qualified electrical personnel.
2) When performing maintenance, first disconnect the power supply, and only proceed with repairs after the compensation capacitors have fully discharged.
3) Perform maintenance regularly.
5) If a knife switch is selected as the main switch for the distribution box, it must be operated—both switching on and off—only under no-load conditions to ensure personal safety.
6) If users choose a comprehensive distribution box equipped with a reactive power compensation device, the reactive power automatic compensation controller included in the product must be operated and inspected strictly according to the instruction manual.
VIII. External Dimensions and Installation Size
| Cabinet external dimensions (mm) | High | Wide | Deep |
| 1800 1900 2000 2200 |
600 800 1000 1200 |
600 800 1000 |
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No. 9 Qianfeng North Road, Shiji Town, Panyu District, Guangzhou City
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