**Product Introduction: Handheld Capacitive Current Tester**
In China's power systems, ungrounded neutral points are common. Single-phase ground faults generate capacitive currents from line-to-ground capacitance, often causing arcing that leads to system failures. Regulations require arc suppression coils when capacitive currents exceed 30A (10kV) or 10A (35kV), necessitating accurate measurement. Additionally, stray capacitance combined with PT parameters may trigger dangerous ferroresonance overvoltages, requiring precise capacitance measurement for risk assessment.
Traditional methods (e.g., direct single-phase grounding, external capacitance injection) involve high-risk operations on primary equipment, with complex procedures and low efficiency. Modern PT secondary-side signal injection avoids these risks by applying low-level out-of-band signals to the PT open delta terminals, eliminating interference with protection systems or PT operations while bypassing 50Hz noise. However, existing instruments are bulky and inconvenient for fieldwork.
Our company has developed a new generation of handheld capacitive current testers, miniaturized through advanced design. Key features include:
- **Compact & Portable**: Redesigned hardware with ARM processor and high-speed ADC reduces size/weight for easier field use.
- **Efficient Measurement**: Integrated digital frequency conversion inverter combines dual-frequency signals into one waveform; Fourier analysis extracts amplitude/phase data in a single test, improving efficiency.
- **Enhanced Accuracy**: New algorithms address measurement errors in 4PT configurations, ensuring precision.
- **Safe & Non-Intrusive**: No direct connection to primary equipment; signals injected via PT open delta terminals ensure safety and compliance.
This tester solves limitations of traditional methods, offering safer, faster, and more reliable capacitance and current measurements for modern power systems.
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**Key Improvements Over Previous Models:**
- Smaller size and lighter weight for portability.
- All-digital variable-frequency power supply and optimized signal processing.
- Simultaneous dual-frequency analysis for one-step measurement.
- Specialized algorithms for 4PT configuration accuracy.
Ideal for routine maintenance and fault diagnosis in 10kV/35kV networks, ensuring compliance with arc suppression requirements and ferroresonance risk assessment.
The instrument is a high-precision measuring instrument specially used to detect power quality problems such as waveform distortion, harmonic content and three-phase unbalance in power grid. At the same time, it also has the function of electrical parameter testing and vector analysis.
It is suitable for the analysis and diagnosis of voltage, current, power, electric energy, harmonics, phase and other power parameters.
It is suitable for the analysis and diagnosis of voltage, current, power, electric energy, harmonics, phase and other power parameters.
It can measure voltage amplitude, current amplitude, phase, frequency, active power, reactive power, power factor and other parameters at the same time.
High-precision test instrument specially used to detect power quality problems such as waveform distortion, harmonic content and three-phase imbalance in power grid; At the same time, it also has the function of electrical parameter testing and vector analysis
