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High Voltage Ceramic Doorknob Capacitor for Precise Signal and Clear Communication in Power Line Carrier Systems

  • High Voltage Ceramic Doorknob Capacitor for Precise Signal and Clear Communication in Power Line Carrier Systems
  • High Voltage Ceramic Doorknob Capacitor for Precise Signal and Clear Communication in Power Line Carrier Systems
Place of Origin XIAN, CHINA
Brand Name XIWUER
Certification ISO9001,ISO14001,ISO45001
Minimum Order Quantity 1pcs
Price Negotiable
Packaging Details Carton
Delivery Time 5-7days
Payment Terms L/C,T/T
Supply Ability 4,000,000 pcs a year

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Product Details
Dissipation ≦0.0040 Withstanding Voltage 1.5Ur● 1min
Insulation Resistance ≧1.0×105MΩ
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Precise Signal High Voltage Ceramic Capacitor

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Clear Communication Doorknob Capacitor

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Power Line Carrier Communication HV Ceramic Capacitor
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Product Description
High-Voltage Door Handle Capacitors for Power Line Carrier Communication
Precise signal, clear communication: High-voltage door handle capacitors enable power line carrier communication coupling devices.
High Voltage Ceramic Doorknob Capacitor for Precise Signal and Clear Communication in Power Line Carrier Systems 0
Technical Specifications



No. Specification Dissipation Withstanding voltage Insulation resistance Dimension(mm)
1 20kV-2000pF








≦0.0040








1.5Ur● 1min








≧1.0×105MΩ

 D H L D M
2 20kV-10000pF 45 19 23 12 5
3 20kV-18000pF 65 15 19 12 5
4 30kV-1000pF 80 17 25 12 5
5 30kV-2700pF 45 24 32 12 4
6 30kV-12000pF 60 20 28 12 4
7 40kV-150pF 20 33 41 8 4
8 40kV-500pF 28 33 41 8 4
9 40kV-7500pF 80 24 29 12 6
10 40kV-10000pF 80 22 26 16 5
11 50kV-1000pF 50 30 34 12 4
12 50kV-1000pF 32 27 31 16 5
13 50kV-5600pF 80 31 35 16 5
14 60kV-1500pF 50 31 34 12 5
15 60kV-3000pF 65 32 35 16 5
16 100kV-500pF 50 54 58 12 5
17 100kV-2000pF 51 32 35 16 5
18 Insulator type 100kV-1500pF 68 36 40 16 5
19 150kV-820pF 65 95 100 12 5
20 200kV-600pF 50 90 94 16 5

In power line carrier communication systems, efficient and low-distortion coupling of high-frequency communication signals onto high-voltage power lines without interfering with industrial frequency power transmission is crucial to communication quality. The combined filter and coupling capacitors in the power line carrier coupling device together form the "signal gateway" for this process. The high-voltage doorknob capacitor is the core component responsible for energy exchange and frequency selection within this gateway.
Key Challenges: Impedance Matching and Nonlinear Distortion
In a coupling device, filters must perform two major functions:
  • Impedance Conversion: Matching the high impedance of the power line (approximately 300-400Ω) with the low impedance of the communication cable.
  • Capacitive Reactance Compensation and Filtering: Compensating for the capacitive reactance of the coupling capacitor and working with it to form a bandpass or high-pass filter circuit, allowing only signals in a specific frequency band to pass and suppressing out-of-band noise.
Poor capacitor performance, such as unstable capacitance or excessive internal losses, can lead to:
  • Impedance mismatch, causing signal reflections and increased transmission attenuation.
  • Nonlinear distortion, generating harmonics, disrupting signal integrity, and reducing the communication signal-to-noise ratio.
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