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GGJ Low-Voltage Reactive Power Compensation Cabinet
Product Overview
The GGJ low-voltage reactive power compensation device was jointly developed by a nationwide joint design team comprising Tianjin Institute of Electrical Drive Design & Research Co., Ltd., the Electric Control and Distribution Equipment Branch of the China National Electric Apparatus Industry Association, and over a hundred leading enterprises in the industry. In addition to featuring typical static and dynamic compensation solutions, this device also offers harmonic elimination-based static and dynamic compensation as well as intelligent reactive power compensation schemes. The product fully complies with all requirements of standards such as GB 7251.12—2013 “Low-Voltage Switchgear and Controlgear—Part 2: Complete Power Switchgear and Controlgear” and GB/T 15576-2008 “Low-Voltage Complete Reactive Power Compensation Devices.”
This product series is suitable for normal indoor use under typical operating conditions, with a rated operating voltage of AC 380–1400 V and a frequency of 50–60 Hz. It is a reactive power compensation device that uses parallel capacitors to improve the power factor in continuously operating power supply and distribution systems. Based on the amount of inductive reactive power in the system, the device automatically adjusts its reactive power output, thereby compensating for the system’s reactive power, enhancing power grid voltage quality, reducing losses in the system and transformers, and achieving energy-saving goals.
Model and Meaning
Technical Parameters
● Rated operating voltage Ue: Main circuit, 380 (400) V
● Compensation capacity per step: 10, 15, 20, 30, 45, 60 kvar
● Number of steps: 6, 8, 10, 12 or 7, 11, 15
● Total capacity: Up to 600 kvar (dual-cabinet)
● Switching mode: cyclic or coded plus cyclic
● Compensation method: Centralized compensation
● Protection rating: IP40 or IP43 (glass door)
Terms of Use
● Ambient temperature: -5℃ to +40℃
● Relative ambient humidity: Not exceeding 90% (120℃)
● Altitude: Not exceeding 2000 m
● Pollution Level 3
●Overvoltage Category IV
● The voltage fluctuation range at the installation location of the device shall not exceed ±10% of the rated operating voltage. The total harmonic distortion of the power supply voltage shall not exceed 5%.
● Transportation and Storage Conditions
·If the transportation and storage conditions do not meet the specified requirements, the user shall consult with the manufacturer.
·Unless otherwise specified, the temperature range during the transportation and storage of the device should be between -25℃ and +55℃, and it can briefly (for no more than 24 hours) reach up to +70℃.
· After being subjected to the above-mentioned extreme temperatures while not in operation, the device should not sustain any irreversible damage and should subsequently function normally under the specified normal operating conditions.
Installation Instructions
● Upon receiving the device, the user should first unpack and inspect it. Check whether any components are damaged, whether wires are broken, disconnected, or loose, whether all screws are properly tightened, and whether the accompanying documents, accessories, and attachments are complete. After confirming that everything is in order, move the device onto its installation base.
● After adjusting the device on its mounting base to ensure that the cabinet is perpendicular to the base plane, secure it firmly with bolts. Then, connect the system busbar securely to the device’s horizontal busbar (or via cable), and also connect the arrester’s neutral wire to the system’s neutral line. Finally, use a copper conductor with a cross-sectional area of no less than 50 mm² to connect the cabinet’s grounding device to the system’s grounding section.
● The current-sampling signal for the controller within the device shall be taken from the current transformer on the L1 phase of the main incoming switchgear (or the feeder line corresponding to the section requiring compensation). The current transformer should be of Class 0.5 accuracy and have a rated secondary capacity of no less than 10 VA. Use multi-strand insulated copper wires with a cross-sectional area of no less than 2.5 mm² to connect from the current transformer to the corresponding terminals of the device.
Ordering Instructions
The user should first calculate the required reactive power compensation using the following formula, based on the device’s active power capacity (PIKW), the power factor before compensation (cosφ1), and the power factor after compensation (cosφ2): Q = P × (-) kvar
Then, based on the actual load requirements, select the step capacity of the device (the preferred step capacities are 10, 15, 20, 30, 45, and 60 kvar). The manufacturer will determine the number of compensation cabinets according to the total capacity required by the user and the selected step capacity.
Maintenance Instructions
Before performing equipment maintenance, the main circuit must be isolated from the power grid, and the capacitors in the equipment must also be discharged.
Keywords: GGJ Low-Voltage Reactive Power Compensation Cabinet
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Headquarters Address: No. 285, Jiujiang East Road, Chuzhou City, Anhui Province
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