Reactive Power Compensation Cabinet Components

For seamless and reliable operation as part of a compensation cabinet assembly, these product must be applied under the following specified conditions: a) Ambient air temperature: the upper limit is +40°C, the 24-hour average value must not exceed +35°C, and the lower limit is -5°C. b) Altitude: the cabinet installation site should not be higher than 2000m. c) Humidity: at the installation location, the air relative humidity should not exceed 50% when the temperature is +40°C. The average minimum temperature of the wettest month does not exceed +25°C, and that month's average maximum relative humidity does not exceed 90%. d) Pollution degree: 3. e) Installation category: III. f) Shock and vibration: These Reactive Power Compensation Cabinet Components must be installed within the cabinet in a location free from significant shaking, impact, or vibration. g) Installation condition: The inclination of the component's mounting surface relative to the vertical plane should not exceed 5°. Their working principle, illustrated in Figure 1, is key to cabinet performance. The schematic above the dotted line shows the control circuit; below is the single-phase capacitor bank. The integrated resistor switching circuit (early-make contacts with series resistors) closes first upon coil energization, limiting inrush current during capacitor charging. Subsequently, the main contacts close to carry the load. A vital feature of these Reactive Power Compensation Cabinet Components is the automatic disconnection and reset of the resistor circuit post-suppression, significantly reducing the risk of resistor burnout and ensuring the cabinet's long-term, maintenance-friendly operation.