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JKF8

JKF8

The JKF8 Intelligent Low-Voltage Reactive Power Compensation Controller is designed for efficient and precise control of reactive power in low-voltage distribution systems. It automatically measures, analyzes, and adjusts reactive compensation to maintain an optimal power factor. Featuring real-time display, automatic polarity detection, surge prevention, and cyclic self-testing, the JKF8 ensures safe and stable operation in industrial, commercial, and power distribution networks.

Product Information

Rated Voltage: 380V, 440V, 220V, 240V (selectable)
Rated Frequency: 50/60Hz ±5%
Sampling Voltage: 400VAC ±10% (customizable to 220VAC or 440VAC)
Sampling Current: 150mA–5A
Low-Current Capacitor Connection Prevention: ≤150mA (prevents false switching at low current)
Current Transformer Ratio: 5–800 (factory preset: 300/5 = 60)
Time Lag (Switching Delay): 5–120s (factory preset: 30s)
Control Loops:
- JKF8-6: 1–6 control loops
- JKF8-12: 1–12 control loops
Capacitor Connection Threshold:
- Auto mode: smallest capacitor step
- Manual mode: 1–120kVar (factory preset: 10kVar)
Power Factor Range: 0.85–0.95 adjustable (factory preset: 1.00)
Over-voltage Threshold: 400–456V (factory preset: 430V); 230–270V (preset: 250V)
Operation Modes:
- Automatic cyclic control
- Manual operation mode
Display Parameters: Real-time voltage, current, power factor, reactive power (kVar), and active power (kW)
Protection Features:
- Over-voltage / under-voltage disconnection
- Low-current capacitor blocking
- Automatic polarity detection
- Anti-surge and overcompensation prevention
Power Consumption: ≤15W
Output Contact Capacity: 5A/230V or 3A/400V
Weight: ≈1.5kg
Operating Temperature: −10°C to +40°C
Humidity: ≤50% at 40°C; ≤90% at 20°C
Altitude: ≤2000m
Mounting Dimensions: 120×120×130mm; installation hole spacing 113±0.5mm
Compliance: Conforms to IEC/EN low-voltage reactive power compensation standards

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JKF8-Intelligent Low Volatage Reactive Power Automatic Compensating Controller-Catalog.pdf

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2024-10-22

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JKF8-Drawing.stp

2024-10-22

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FAQs

What is the function of the JKF8 Intelligent Low-Voltage Reactive Power Compensation Controller?

It manages and compensates reactive power in low-voltage networks, improving the power factor and reducing energy losses, thus increasing power system efficiency.

How does it protect the system from voltage instability?

If the network voltage drops below 300V or exceeds the preset over-voltage limit, the JKF8 automatically disconnects capacitors in steps within 5 seconds to prevent equipment damage.

What makes the JKF8 controller intelligent?

It features automatic polarity detection, self-testing, and real-time parameter monitoring, which reduce wiring errors, simplify commissioning, and improve accuracy.

Can it be used in automated capacitor panels?

Yes. The JKF8 supports cyclic automatic self-test and stepwise capacitor switching, making it ideal for automated reactive power compensation panels.

What environmental conditions are suitable for installation?

It operates safely between −10°C and +40°C, at ≤2000m altitude, in environments free from corrosive gases, explosive dust, or strong vibration.