Reactive Power Compensation Capacitor Bank
1.Basic Principle
The core principle is to control the number of capacitor banks connected in parallel to the power grid via automatic switching devices, in order to compensate for the reactive power consumed by inductive loads.
2.The Components ADL-PQC-PFC Reactive Power Compensation Cabinet
| Low-voltage self-healing power capacitors | Series reactor |
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| Low-voltage reactive power automatic compensation controller | Contactor |
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Overview Of Capacitor:
The CYMD series self-healing shunt capacitor is suitable for power frequency AC power system with nominal voltage of 1000V and below.It's used to improve power factor,reduce reactive power loss on lines and improve voltage quality.
The self-healing shunt capacitor produced by our company uses metallized polypropylene film with excellent self-healing perfomance,absorbs advanced domestic and foreign technology and strictly follows the nationak standard GB/T 12747.1 for production.The company owns complete production equipment and strong technical force,and is one of the most reliable manufacturers of low-voltage self-healing shunt capacitor in china.
Technical Data Of Capacitor:
| Item | Specification |
| Ambient temperature | -25℃～+50℃ |
| Relative humidity | ≤20% at 40℃; ≤90% at 20℃ |
| Altitude | ≤2000m |
| Environmental conditions | where should be free of harmful gases or vapors, conductive or explosive dust, and there should be no severe mechanical vibration. The operating environment should be well-ventilated; it is strictly prohibited to operate in a confined, poorly ventilated environment. |
| Withstand voltage |
Pole to pole:power frequency 2.15Un,2S; Pole to shell:3.6KV/5S applied to product with rated voltage of 600V and below;7.2KV/5S applied to product with rated voltage of 600V or above |
| Rated capacity | 5-30kvar |
| Capacitance deviation | The difference between the measured value and the rated value of the capacitor shall not exceed -5%～+10%,and the ratio of the maximum to minimum capacitance measured between any two line terminals in three-phase capacitor shall not exceed1.08 |
| Loss angle tangent value | below 0.0012 under rated power frequency voltage |
| Maximum allowable overvoltage | 1.1Un,not exceeding 8h every 24h |
| Maximum allowable overcurrent | 1.3In |
| Self-discharge characteristics | The capacitor is equipped with discharge device,which can reduce the residual voltage of the capacitor from √2Un to 75V or below within 3min after disconnecting the power supply. |
Model Description:
| Model No. | Rated voltage(KV) | Rated capacity(KVar) | Reated capacitor(uf) | Rated current(A) | Shell diameter(mm) | Shell height(mm) | Load terminal(mm) |
| CYMD0.4-5-3 | 0.4 | 5 | 99.5 | 7.2 | 76 | 240 | M12 |
| CYMD0.4-10-3 | 0.4 | 10 | 199 | 14.4 | 76 | 240 | M12 |
| CYMD0.4-12-3 | 0.4 | 12 | 238.9 | 17.3 | 86 | 240 | M12 |
| CYMD0.4-15-3 | 0.4 | 15 | 298.6 | 21.7 | 86 | 240 | M12 |
| CYMD0.4-16-3 | 0.4 | 16 | 318.5 | 23.1 | 86 | 240 | M12 |
| CYMD0.4-20-3 | 0.4 | 20 | 398.1 | 28.9 | 106 | 240 | M16 |
| CYMD0.4-25-3 | 0.4 | 25 | 497.6 | 36.1 | 106 | 240 | M16 |
| CYMD0.4-30-3 | 0.4 | 30 | 597.1 | 43.3 | 116 | 240 | M16 |
Model explanation:
Overall Dimensions
Overview Of Reactor:
DK series three-phase series reactors are used in reactive power compensation devices for low-voltage power distribution equipment. Because capacitors are affected by harmonic currents, inrush currents, and operating voltages when compensating capacitive reactive power, they are prone to damage and reduced power factor. Therefore, a three-phase series reactor needs to be installed at the front end of the capacitor to suppress and absorb harmonics, protect the capacitor, avoid the effects of harmonic voltage and current and inrush current, and extend the capacitor's service life.
Technical Data Of Reactor:
| Item | Specification |
| Ambient temperature | -45℃～55℃ |
| Relative humidity | ≤20% at 40℃; ≤90% at 20℃ |
| Altitude | ≤2000m |
| Environmental conditions | where should be free of harmful gases or vapors, conductive or explosive dust, and there should be no severe mechanical vibration. The operating environment should be well-ventilated; it is strictly prohibited to operate in a confined, poorly ventilated environment. |
| Rated voltage(KV) | 0.48/0.525/0.66/0.69 |
| Reactance | 6%,7% suppression of harmonics above the 5th order |
| Reactance | 12%,14% suppression of harmonics above the 3rd order |
| Pressure rating | 5KV/min |
| Insulation class | Class B,Class F,Class H |
| Noise | ≤60dB |
| Overload capacity | Continuous operation at ≤1.35In |
Model Description:
| Model No. | Rated voltage(KV) | Matching capacitor(KVar) | Voltage drop(V) | Current(A) | External dimensions L*W*H(mm) | Installation dimensions a*bl(mm) | Drawing |
| DK0.7/0.48-7% | 0.48 | 10 | 19.4 | 12 | 170*115*165 | 120*80 | D |
| DK1.05/0.48-7% |
0.48 | 15 | 19.4 | 18 | 200*160*180 | 170*75 | Y |
| DK1.4/0.48-7% | 0.48 | 20 | 19.4 | 24 | 200*170*180 | 170*90 | |
| DK1.75/0.48-7% | 0.48 | 25 | 19.4 | 30 | 200*180*180 | 170*100 | |
| DK2.1/0.48-7% | 0.48 | 30 | 19.4 | 36 | 200*180*205 | 170*100 | |
| DK2.8/0.48-7% | 0.48 | 40 | 19.4 | 48 | 240*190*235 | 200*100 | |
| DK3.5/0.48-7% | 0.48 | 50 | 19.4 | 60 | 250*205*235 | 210*110 | |
| DK4.2/0.48-7% | 0.48 | 60 | 19.4 | 72 | 250*205*255 | 210*110 |
Model explanation:
Overall Dimensions
Overview Of Controller:
The JKW series low-voltage reactive power compensation controller is suitable for the automatic adjustment and control of capacitor compensation devices in low-voltage power distribution systems. It enables the power factor to reach the user's predetermined state, improves the utilization rate of power transformers, reduces line losses, and improves the voltage quality of power supply, thereby improving economic and social benefits.
Technical Data Of Controller:
| Item | Specification |
| Ambient temperature | -45℃～55℃ |
| Relative humidity | ≤20% at 40℃; ≤90% at 20℃ |
| Altitude | ≤2000m |
| Environmental conditions | where should be free of harmful gases or vapors, conductive or explosive dust, and there should be no severe mechanical vibration. The operating environment should be well-ventilated; it is strictly prohibited to operate in a confined, poorly ventilated environment. |
| Working voltage | 400V±20%,Voltage distortion rate ≤ 5.0% |
| Sampling current | ≥100mA,≤5A |
| Network frequency | 50Hz±5Hz |
| Control way | Control CJ19 contactor:AC380V 3A 50Hz |
| Measurement accuracy | Voltage:≤1%;Current:1%;Reactive power:≤1%,Power factor:≤1% |
| Control quantity | 12 units replenished |
| Compensation way | Three-phase compensation |
| Protection | Overvoltage protection, undervoltage protection, undercurrent protection, harmonic over-limit protection |
Model Description:
| Model | Overall dimensions(mm) | Installation dimensions(mm) |
| JKW5C-4、6、8、10、12 | 120*120*72 | 113*113 |
Model explanation:
Overview Of Contatcor:
The CJ19 series capacitor switching contactor is mainly used in AC 50Hz or 60Hz power lines with a rated operating voltage up to 400V for connecting or disconnecting low-voltage parallel capacitors in low-voltage reactive power compensation equipment. The contactor is equipped with an inrush current suppression device, which effectively reduces the impact of closing inrush current on the capacitor and suppresses overvoltage during disconnection.
3.Customized Solution
Tailored Solutions, Precise Compensation – Your Expert in Customized Reactive Power Compensation
Service Description:
We understand that every client operates in a unique electrical environment with distinct load characteristics and process requirements. That's why we never believe in a "one-size-fits-all" approach. Our team of professional engineers is dedicated to providing fully customized reactive power compensation solutions, ensuring optimal performance and unparalleled protection for your electrical system.
Our Customization Services Include:
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Precise Capacity Configuration: We analyze your load types (e.g., motors, VFDs, welding machines), current power factor, and future expansion plans to calculate and configure the most accurate compensation capacity, preventing over-compensation or under-compensation.
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Environment-Specific Design: For challenging application environments, we offer enhanced designs including dust-proof, moisture-resistant, anti-corrosion, high-temperature endurance, and high-altitude adaptation to ensure stable operation under harsh conditions.
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Specific Load Solutions: For loads that generate significant harmonics (such as VFDs, medium frequency furnaces, arc furnaces), we provide harmonic-resistant compensation schemes with built-in reactors to effectively suppress harmonic amplification and protect capacitors from damage.
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Flexible Control & Protection: We can configure different switching mechanisms (contactor/thyristor) and controllers (basic/smart) based on your automation needs. Comprehensive protection features like over-current, over-voltage, under-voltage, and over-temperature protection are also available.
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Structure & Installation Customization: We offer flexible adjustments to cabinet dimensions, color, and cable entry/exit methods to facilitate easy installation and seamless integration into your existing site.
Our Commitment:
From on-site assessment and solution design to manufacturing, your needs are at the core of everything we do. By choosing us, you gain more than just a high-quality capacitor bank; you secure a customized power assurance plan that enhances energy efficiency, ensures safety, and reduces operational costs.