Dual Canopy Mechanic Electrical Engineering Co., Ltd. is one of the leading manufacturers and suppliers of capacitance meters in China. Please feel free to wholesale discount products for sale here and get quotation from our factory. Customized orders are welcome.
What is Capacitance Meters?
A capacitance meter is a dedicated instrument built for precise capacitance measurement. It applies an AC excitation signal at a known frequency to the device under test, then measures the resulting current-voltage relationship to calculate the equivalent capacitance with accuracy.
In power system work, this measurement goes well beyond simply confirming a component's nameplate value. It serves as a practical diagnostic tool for assessing insulation condition, pinpointing equipment faults, and managing balance in parallel compensation banks. A marked shift in capacitance often signals underlying trouble-whether that means insulation degradation, dielectric breakdown, or physical damage to the capacitor structure.
Where are the application scenarios?
Factory Inspection: Verification of the capacitance qualification of each capacitor by the manufacturer.
Handover and Acceptance: Verification of each capacitor before commissioning of a newly installed capacitor bank.
Unbalance Protection Setting Support: Accurate measurement of the capacitance of each capacitor, calculation of the imbalance degree, and assistance in setting protection settings.
Preventive Testing: Periodic retesting to identify anomalies by comparing with historical data.
Metrological Standard Traceability: Participating in the transfer of measurement values as a precision measuring tool.
What technical services can you provide?
Selection Recommendations: We recommend suitable models based on the object being tested (pF-level bushings/µF-level power capacitors), measurement accuracy requirements, frequency requirements, and data management needs.
Capacitor Bank Measurement Solutions: We provide unit-by-unit measurement procedures, numbering rules, unbalance calculation templates, and recording forms.
Bushing Measurement Support: We provide guidance on end-screen connection methods, lead configuration, and compensation operation.
Metrology and Traceability Support: We provide calibration certificate levels and traceability instructions to meet metrology acceptance requirements.
Document Support: Product parameter tables, configuration lists, typical test report samples, and bidding documents.
FAQ
Q1: What is the difference between a Capacitance Meter and a Capacitor Inductor Tester?
A: A capacitance meter focuses on high-precision measurement of capacitance; a capacitance and inductance tester covers capacitance, inductance, and ESR simultaneously, offering more comprehensive functionality, but with a different emphasis on accuracy for capacitance measurements.
Q2: Why are the results unstable when measuring small pF capacitors?
A: Common causes include the influence of lead distributed capacitance (leads too long/uncompensated), contact oxidation, environmental interference, or improper instrument range selection; it is recommended to perform open-circuit compensation and shorten the leads.
Q3: What do open-circuit compensation and short-circuit compensation mean? When are they necessary?
A: Open-circuit compensation eliminates the influence of lead distributed capacitance; short-circuit compensation eliminates the influence of lead resistance; it is strongly recommended to perform these when measuring small capacitors (pF level) to improve accuracy.
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