GGJ Low-Voltage Indoor Compensation Cabinet
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Product Description
Product Overview
The GGJ low-voltage indoor compensation cabinet is a new type of integrated indoor distribution reactive power compensation cabinet designed in accordance with the principles of economy, rationality, and reliability. It is suitable for distribution systems operating at 50 Hz and rated voltage of 380 V, including urban grid upgrades, rural grid renovations, industrial and mining enterprises, street lighting, and residential communities. The product boasts advantages such as a novel and well‑reasoned design, a high degree of protection, and convenient installation, commissioning, maintenance, and inspection. Compliant with GB/T 7251.1–2023 and GB/T 15576–2020, and having passed 3C certification, it is an ideal low-voltage complete switchgear for current grid renovation projects.
Product Model and Meaning
Operating Environment
1. Ambient air temperature: -20°C to +35°C;
2. Relative air humidity: ≤90% (at a relative ambient temperature of 20°C–25°C);
3. Altitude ≤ 2,500 m;
4. Environmental Conditions: Suitable for indoor installation (within a cabinet), but not suitable for locations with fire or explosion hazards, severe contamination, chemical corrosion, or intense vibration. 5. During installation, the tilt angle relative to the vertical plane should be ≤5°. Note: If the operating environment exceeds the above‑mentioned normal conditions, consultation with the manufacturer is required.
Main Structural Features
The cabinet frame shall be fabricated from profiles or steel plates with a thickness of no less than 1.5 mm, joined by welding or screw assembly, and its surface shall be coated with an anti-corrosion layer. The outer surface of the device enclosure should generally be spray-coated with a non-glare, reflective‑resistant finish, and the surface must be free from defects such as blistering, cracking, or flow marks.
The device is equipped with discharge measures that ensure, after the capacitor is de-energized, it discharges from its rated voltage peak to 50 V within no more than 3 minutes. The device features power-frequency overvoltage protection: when the voltage applied to the device reaches 1.1 times the rated voltage, the capacitor will be disconnected within 1 minute.
Automatic control devices can be operated using methods such as cyclical switching or coded switching. During automatic switching, each capacitor bank is either switched in or switched out in a way that ensures the voltage across its terminals does not exceed 10% of the capacitor’s rated voltage when it is reconnected.
Three-phase compensation devices with more than two compensation branches should be equipped with phase‑loss protection. This phase‑loss protection ensures that, when the main circuit or a branch circuit experiences a phase loss, all capacitor banks or the capacitors in the affected branch are disconnected. The device’s dynamic response time must meet system requirements and should not exceed 1 second.
Main Technical Parameters
Parameter Name | Unit | Parameters | |
Rated Voltage | Rated Insulation Voltage | V | AC660 |
Rated operating voltage | V | AC380 | |
Rated Impulse Withstand Voltage | V | AC2500 | |
Rated Frequency | Hz | 50 | |
Maximum operating current of the main busbar | A | 455 | |
Rated Peak Withstand Current (0.1 s) | kA | 30 | |
Rated short-time withstand current (1 s) | kA | 15 | |
Compensation capacity | four | 60–420 | |
Protection Level |
| IP30 | |
Cabinet external dimensions: Width × Depth × Height (mm) | mm | 600/800/1000 × 600/800/1000 × 2200 | |
Ordering Instructions
1. Main Circuit System Diagram;
2. Auxiliary Circuit Electrical Schematic;
3. List of Components Inside the Cabinet (including component model, name, specifications, and quantity);
4. Layout drawing of switchgear;
5. Cabinet color (unless otherwise specified, products will be supplied according to the company’s standard);
6. List of Required Spare Parts and Components;
7. Other Terms of Use
Keywords:
GGJ Low-Voltage Indoor Compensation Cabinet
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East of the 22nd Avenue and south of Fengda Road, Zhengzhou Economic and Technological Development Zone
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