Low Voltage Compensation Controller

The Low Voltage Compensation Controller is an intelligent automatic reactive power compensation device driven by a high-speed, high-performance microprocessor. This capable product simultaneously samples 3-phase voltage and 3-phase current signals, providing users with 6 different split-phase + common-phase compensation schemes and 12 switching coding options. Control parameters can be modified as desired and, once set, are permanently saved without risk of loss during power outages. It utilizes a compound control method based on fundamental power factor and fundamental reactive power to switch capacitor banks, ensuring stable, oscillation-free operation and maintaining insensitivity to voltage and current harmonic interference. This product is designed for the automatic control of reactive power compensation in power systems below 0.4KV, within an AC frequency range of 45Hz to 65Hz. Its technical parameters are precisely defined: Rated Operational Voltage: AC380V; Rated Operational Current: AC 0.1～5A; Static Output: AC 220V 3A; Dynamic Output: DC 12V 10mA; Rated Operational Frequency: 45-65Hz; Displayed Power Factor: Lagging 0.001 - Leading 0.001; Measured Reactive Power: 0-9999 Kvar; Measured Active Power: 0-9999 KW; Measured Apparent Power: 0-9999 KVA; Under-voltage Protection Value: AC 170V; Sensitivity: 100mA; Display Method: Digital Tube. For dependable performance, install and operate this product under these conditions:

• 1) At an altitude not exceeding 2500 meters;
• 2) Within an ambient temperature range of -25℃ to +50℃;
• 3) With air humidity levels ≤50% at 40℃ and ≤90% at 20℃;
• 4) In a surrounding environment free from corrosive gases, conductive dust, and flammable or explosive materials;
• 5) At a location without severe vibration.

The purpose of this Low Voltage Compensation Controller is to automatically regulate capacitor compensation devices in low-voltage distribution networks. By doing so, it brings the power factor to a user-defined target, enhancing the utilization efficiency of power transformers, reducing line losses, and improving overall voltage quality. When paired with non-contact switches (including dynamic regulators and composite switches), this product enables rapid switching to achieve ideal reactive compensation, making it an excellent fit for sites employing a combination of common-phase and split-phase compensation. The functional characteristics of this Low Voltage Compensation Controller are robust:

• 1. It calculates switching capacity using the sum of 3-phase fundamental reactive power, preventing switching oscillations and correctly displaying grid power factor in harmonic-rich environments.
• 2. It features high-accuracy power factor measurement with a wide display range.
• 3. It shows real-time total power factor (PF) and fundamental power factor (DPF).
• 4. It displays real-time 3-phase voltage, current, active power, reactive power, and apparent power values separately.
• 5. It operates in either Automatic or Manual mode.
• 6. The human-machine interface is user-friendly.
• 7. It offers 12 coding output modes for selection.
• 8. It provides up to 6 compensation schemes (for allocating common and split-phase circuits).
• 9. It can control a maximum of 16 output circuits.
• 10. All control parameters are digitally adjustable, intuitive, and convenient.
• 11. Power-down protection ensures data integrity.
• 12. It includes over-voltage and under-voltage protection.
• 13. The current signal input impedance is ≤0.01Ω.
• 14. The target power factor adjustment range is wide, from 0.70 lagging to 0.70 leading.