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The LVC Series is a low-voltage contactless dynamic reactive power compensation device designed to respond to real-time reactive power demands in electrical systems. By applying instantaneous reactive power theory and harmonic analysis, it performs dynamic measurement and calculation to ensure optimal compensation performance.
The device utilizes STS (STS thyristor Switch) dynamic reactive power compensation switching regulators to rapidly connect or disconnect multi-stage capacitor banks, delivering dynamic reactive power support to the power system.
This solution is ideal for applications with rapidly fluctuating impact loads or where three-phase imbalance requires phase-specific compensation. It is widely adopted across industries such as:
Mechanical manufacturing
Metallurgy and mining
Coal and chemical engineering
Water supply and building materials
Ports and electrified railways
...and any other sector requiring efficient and responsive reactive power compensation.
LVC Series – Low-Voltage Dynamic Reactive Power Compensation Device
Product Features
Equipped with STS series dynamic reactive power compensation switching regulator, featuring voltage zero-crossing switching-on and current zero-crossing switching-off, enabling contactless, inrush-free, and transient-free switching.
The STS series switching regulator adopts photoelectric triggering technology, ensuring complete electrical isolation between the primary and secondary systems. This guarantees reliable trigger signal synchronization and safe device operation, with low control power consumption, fast response, arc-free operation, high switching frequency, and extended service life.
Supports hybrid compensation combining common and individual compensation, allowing phase-specific compensation to reduce system imbalance and achieve more precise reactive power regulation.
Integrated with SLC series dynamic power factor controller, offering strong anti-interference capability (withstanding up to 2000V interference pulses directly from the power supply). It independently measures three-phase voltage, current, reactive power, and power factor, and can display harmonic voltage and current up to the 50th order.
Real-time automatic detection of system power factor and reactive power; based on comprehensive assessment, it adopts a multi-loop intelligent coding switching strategy for optimal control.
Supports manual or automatic switching of capacitors to adapt to on-site control requirements.
Utilizes SC series low-voltage self-healing shunt capacitors, featuring low loss, low operating temperature, long lifespan, and self-healing properties.
Equipped with comprehensive protection functions including overload, short circuit, phase loss, harmonics, overvoltage, and undervoltage. Built-in lightning arrester absorbs switching overvoltages, and SR series low-voltage series reactors can be configured for harmonic suppression.
Standard RS485 communication interface enables remote monitoring and control.
Compact and rational structure with clear layout and neat wiring, facilitating easy maintenance and troubleshooting.
Model Description
LVCT – □ – □ / □ – □
Code | Description |
R | With reactor (if not marked: without reactor) |
Grouping method | Compensation grouping configuration |
Rated capacity | Device capacity (kvar) |
Rated voltage | Device voltage (kV) |
LVCT | Low-voltage contactless dynamic reactive power compensation device |
Main Technical Parameters
Parameter | Specification |
Rated Voltage | 0.22 ~ 0.69 kV |
Single Group Capacity | ≤ 60 kvar (customizable for larger capacities) |
Response Time | ≤ 15 ms |
Compensation Method | Total compensation / Partial compensation |
Wiring Method | Delta (Δ) for joint compensation / Star (Y) for separate compensation |
Control Mode | Loop control / Encoding control |
Device Structure | Cabinet type |
Cooling Method | Self-cooling / Air-cooling |
Condition of use
Ambient temperature：-25°C to +45°C(Customizable for special ambient temperatures)
Relative humidity of air:≤95%
Maximum operating voltage:≤1.1UN
Maximum load current:≤1.3IN
Surrounding medium:There are no explosive or flammable hazardous materials, no harmful gases that corrode metals or damage insulation, and no conductive dust
Installation location：There should be no severe vibration and the inclination Angle should not exceed 5%
Quality of power supply system:It complies with national standards and has no strong harmonics
Execution and reference standards
IEC60831-1:2014:Shunt power capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1 000 V - Part 1: General - Performance, testing and rating-Safety requirements - Guide for installation and operation
GB/T 12747.1-2017 :Self-healing Shunt Capacitors for AC Power Systems with Nominal Voltage of 1000V and Below
GB/T22582-2023:"Low-voltage Power Factor Correction Device for Power Capacitors"
GB50227-2017 "Code for Design of Shunt Capacitor Installations"
Selection Instructions
In the order model, the rated voltage of the device, the rated capacity of the device and the grouping method should be indicated. Other special requirements must be specified. The LVCT series contactless dynamic compensation device generally adopts centralized compensation, cabinet structure, can be paralleled with all mainstream low-voltage switch cabinet types, and is suitable for different busbar fixed positions and methods
The configuration and structural dimensions of the device can be negotiated and determined according to the user's requirements
Selection example
If the rated voltage of a certain system is 0.4kV and the installation capacity needs to be compensated for 240kvar, it is recommended to use the contactless reactive power dynamic compensation device of model LVCT-0.4-240/8-R, which can achieve 8-level compensation. It is composed of 1 cabinet with dimensions of 1000X800X2200mm.
LVC Series – Low-Voltage Dynamic Reactive Power Compensation Device
Frequently Asked Questions (Q&A)
Q1: What is the main function of this device?
A: The LVC Series dynamically compensates reactive power in low-voltage power systems. It improves power factor, reduces line losses, stabilizes voltage, and helps avoid utility penalties due to low power factor.
Q2: What does "contactless" mean?
A: It uses STS series switching regulators with photoelectric triggering, enabling voltage zero-crossing switching-on and current zero-crossing switching-off. This means:
No mechanical contacts → no arcing, no wear
Longer service life
Faster response (≤15ms)
Suitable for frequent load changes
Q3: What types of applications is it suitable for?
A: Ideal for industrial and commercial facilities with rapidly fluctuating loads or three-phase imbalance, such as:
Manufacturing, metallurgy, mining
Chemical plants, water supply
Ports, electrified railways
Any site needing fast, reliable power factor correction
Q4: Does it provide harmonic filtering?
A: Yes – but only for fixed harmonics.
LVC is a fixed compensation device. If harmonic filtering is required, it can be configured with SR series reactors tuned to specific harmonic orders (e.g., 5th, 7th).
⚠️ Note: It cannot adapt to changing harmonic conditions. For loads with variable harmonics (e.g., VFDs), an active harmonic filter (AHF) is recommended.
Q5: Is it suitable for VFD loads?
A: Only if harmonic conditions are stable and known.
Because LVC is a fixed compensation device, it works best when:
Dominant harmonics are fixed (e.g., 5th from 6-pulse drives)
A harmonic study has been performed to confirm suitability
For VFD-heavy applications with varying harmonics, we recommend active filters instead.
Q6: What protection features does it have?
A: Comprehensive protection includes:
Overload, short circuit, phase loss
Overvoltage, undervoltage
Harmonic protection
Built-in lightning arrester
Optional reactors for harmonic control
Q7: Can it be monitored remotely?
A: Yes. Standard RS485 communication interface enables remote monitoring and integration with SCADA or energy management systems.
Q8: How do I select the right model?
A: When ordering, specify:
Rated voltage (e.g., 0.4kV)
Rated capacity (e.g., 240kvar)
Grouping method (e.g., 8-level)
Harmonic filtering needs (if any, specify target orders)
Example:
LVCT-0.4-240/8-R = 0.4kV, 240kvar, 8-level, with reactor
Q9: What are the key technical limits?
A:
Voltage: 0.22 ~ 0.69 kV
Single group capacity: ≤ 60 kvar (customizable)
Response time: ≤ 15 ms
Cooling: Self-cooling or air-cooling
Q10: When should I choose LVC vs. an active filter?
A:
Need | Recommendation |
Power factor correction + stable, known harmonics | ✅ LVC Series |
Power factor correction + varying harmonics (e.g., VFDs) | ❌ Not suitable – use Active Harmonic Filter |
Unknown harmonic conditions | ⚠️ Harmonic study required first |
Q11: Do you provide technical support?
A: Yes. We offer:
On-site power quality analysis
Harmonic studies
Custom solution design
Cabinet layout customization
The LVC Series is a low-voltage contactless dynamic reactive power compensation device designed to respond to real-time reactive power demands in electrical systems. By applying instantaneous reactive power theory and harmonic analysis, it performs dynamic measurement and calculation to ensure optimal compensation performance.
The device utilizes STS (STS thyristor Switch) dynamic reactive power compensation switching regulators to rapidly connect or disconnect multi-stage capacitor banks, delivering dynamic reactive power support to the power system.
This solution is ideal for applications with rapidly fluctuating impact loads or where three-phase imbalance requires phase-specific compensation. It is widely adopted across industries such as:
Mechanical manufacturing
Metallurgy and mining
Coal and chemical engineering
Water supply and building materials
Ports and electrified railways
...and any other sector requiring efficient and responsive reactive power compensation.
LVC Series – Low-Voltage Dynamic Reactive Power Compensation Device
Product Features
Equipped with STS series dynamic reactive power compensation switching regulator, featuring voltage zero-crossing switching-on and current zero-crossing switching-off, enabling contactless, inrush-free, and transient-free switching.
The STS series switching regulator adopts photoelectric triggering technology, ensuring complete electrical isolation between the primary and secondary systems. This guarantees reliable trigger signal synchronization and safe device operation, with low control power consumption, fast response, arc-free operation, high switching frequency, and extended service life.
Supports hybrid compensation combining common and individual compensation, allowing phase-specific compensation to reduce system imbalance and achieve more precise reactive power regulation.
Integrated with SLC series dynamic power factor controller, offering strong anti-interference capability (withstanding up to 2000V interference pulses directly from the power supply). It independently measures three-phase voltage, current, reactive power, and power factor, and can display harmonic voltage and current up to the 50th order.
Real-time automatic detection of system power factor and reactive power; based on comprehensive assessment, it adopts a multi-loop intelligent coding switching strategy for optimal control.
Supports manual or automatic switching of capacitors to adapt to on-site control requirements.
Utilizes SC series low-voltage self-healing shunt capacitors, featuring low loss, low operating temperature, long lifespan, and self-healing properties.
Equipped with comprehensive protection functions including overload, short circuit, phase loss, harmonics, overvoltage, and undervoltage. Built-in lightning arrester absorbs switching overvoltages, and SR series low-voltage series reactors can be configured for harmonic suppression.
Standard RS485 communication interface enables remote monitoring and control.
Compact and rational structure with clear layout and neat wiring, facilitating easy maintenance and troubleshooting.
Model Description
LVCT – □ – □ / □ – □
Code | Description |
R | With reactor (if not marked: without reactor) |
Grouping method | Compensation grouping configuration |
Rated capacity | Device capacity (kvar) |
Rated voltage | Device voltage (kV) |
LVCT | Low-voltage contactless dynamic reactive power compensation device |
Main Technical Parameters
Parameter | Specification |
Rated Voltage | 0.22 ~ 0.69 kV |
Single Group Capacity | ≤ 60 kvar (customizable for larger capacities) |
Response Time | ≤ 15 ms |
Compensation Method | Total compensation / Partial compensation |
Wiring Method | Delta (Δ) for joint compensation / Star (Y) for separate compensation |
Control Mode | Loop control / Encoding control |
Device Structure | Cabinet type |
Cooling Method | Self-cooling / Air-cooling |
Condition of use
Ambient temperature：-25°C to +45°C(Customizable for special ambient temperatures)
Relative humidity of air:≤95%
Maximum operating voltage:≤1.1UN
Maximum load current:≤1.3IN
Surrounding medium:There are no explosive or flammable hazardous materials, no harmful gases that corrode metals or damage insulation, and no conductive dust
Installation location：There should be no severe vibration and the inclination Angle should not exceed 5%
Quality of power supply system:It complies with national standards and has no strong harmonics
Execution and reference standards
IEC60831-1:2014:Shunt power capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1 000 V - Part 1: General - Performance, testing and rating-Safety requirements - Guide for installation and operation
GB/T 12747.1-2017 :Self-healing Shunt Capacitors for AC Power Systems with Nominal Voltage of 1000V and Below
GB/T22582-2023:"Low-voltage Power Factor Correction Device for Power Capacitors"
GB50227-2017 "Code for Design of Shunt Capacitor Installations"
Selection Instructions
In the order model, the rated voltage of the device, the rated capacity of the device and the grouping method should be indicated. Other special requirements must be specified. The LVCT series contactless dynamic compensation device generally adopts centralized compensation, cabinet structure, can be paralleled with all mainstream low-voltage switch cabinet types, and is suitable for different busbar fixed positions and methods
The configuration and structural dimensions of the device can be negotiated and determined according to the user's requirements
Selection example
If the rated voltage of a certain system is 0.4kV and the installation capacity needs to be compensated for 240kvar, it is recommended to use the contactless reactive power dynamic compensation device of model LVCT-0.4-240/8-R, which can achieve 8-level compensation. It is composed of 1 cabinet with dimensions of 1000X800X2200mm.
LVC Series – Low-Voltage Dynamic Reactive Power Compensation Device
Frequently Asked Questions (Q&A)
Q1: What is the main function of this device?
A: The LVC Series dynamically compensates reactive power in low-voltage power systems. It improves power factor, reduces line losses, stabilizes voltage, and helps avoid utility penalties due to low power factor.
Q2: What does "contactless" mean?
A: It uses STS series switching regulators with photoelectric triggering, enabling voltage zero-crossing switching-on and current zero-crossing switching-off. This means:
No mechanical contacts → no arcing, no wear
Longer service life
Faster response (≤15ms)
Suitable for frequent load changes
Q3: What types of applications is it suitable for?
A: Ideal for industrial and commercial facilities with rapidly fluctuating loads or three-phase imbalance, such as:
Manufacturing, metallurgy, mining
Chemical plants, water supply
Ports, electrified railways
Any site needing fast, reliable power factor correction
Q4: Does it provide harmonic filtering?
A: Yes – but only for fixed harmonics.
LVC is a fixed compensation device. If harmonic filtering is required, it can be configured with SR series reactors tuned to specific harmonic orders (e.g., 5th, 7th).
⚠️ Note: It cannot adapt to changing harmonic conditions. For loads with variable harmonics (e.g., VFDs), an active harmonic filter (AHF) is recommended.
Q5: Is it suitable for VFD loads?
A: Only if harmonic conditions are stable and known.
Because LVC is a fixed compensation device, it works best when:
Dominant harmonics are fixed (e.g., 5th from 6-pulse drives)
A harmonic study has been performed to confirm suitability
For VFD-heavy applications with varying harmonics, we recommend active filters instead.
Q6: What protection features does it have?
A: Comprehensive protection includes:
Overload, short circuit, phase loss
Overvoltage, undervoltage
Harmonic protection
Built-in lightning arrester
Optional reactors for harmonic control
Q7: Can it be monitored remotely?
A: Yes. Standard RS485 communication interface enables remote monitoring and integration with SCADA or energy management systems.
Q8: How do I select the right model?
A: When ordering, specify:
Rated voltage (e.g., 0.4kV)
Rated capacity (e.g., 240kvar)
Grouping method (e.g., 8-level)
Harmonic filtering needs (if any, specify target orders)
Example:
LVCT-0.4-240/8-R = 0.4kV, 240kvar, 8-level, with reactor
Q9: What are the key technical limits?
A:
Voltage: 0.22 ~ 0.69 kV
Single group capacity: ≤ 60 kvar (customizable)
Response time: ≤ 15 ms
Cooling: Self-cooling or air-cooling
Q10: When should I choose LVC vs. an active filter?
A:
Need | Recommendation |
Power factor correction + stable, known harmonics | ✅ LVC Series |
Power factor correction + varying harmonics (e.g., VFDs) | ❌ Not suitable – use Active Harmonic Filter |
Unknown harmonic conditions | ⚠️ Harmonic study required first |
Q11: Do you provide technical support?
A: Yes. We offer:
On-site power quality analysis
Harmonic studies
Custom solution design
Cabinet layout customization
