Product Overview

In modern power systems, issues such as arc extinction failure during single-phase ground faults and PT ferroresonance overvoltage have become critical threats to grid safety. Traditional capacitive current measurement methods require direct contact with primary equipment, posing risks, operational complexity, and low efficiency. To address these challenges, our company has developed a new-generation Handheld Capacitive Current Tester based on innovative PT secondary-side signal injection technology. This device revolutionizes conventional testing, offering a high-efficiency, safe, and precise solution for power system maintenance.

Key Features

1. Ultra-Portable, High Performance

   • Weighs only 1.2kg, with a compact size (1/3 of traditional devices) and built-in lithium battery supporting up to 100 continuous measurements without external power.
   • Equipped with a 7-inch industrial-grade color LCD screen (800×480 resolution), ensuring clear data visibility under strong ambient light for outdoor use.

2. Precision Measurement, Technical Breakthroughs

   • Utilizes a digital variable-frequency inverter power supply, integrating dual-frequency signals into a single waveform. Fourier transform rapidly extracts amplitude and phase data, enabling complete measurements in one test.
   • Proprietary algorithms resolve measurement errors in 4PT configurations, achieving ±5% accuracy across the full range (0.3μF–200μF, 1A–400A).
   • Real-time monitoring of zero-sequence 3U0 voltage with automatic overvoltage protection to ensure system stability.

3. Smart Connectivity, Effortless Data Management

   • Supports Bluetooth transmission, USB storage, and thermal printing for instant report generation and data archiving.
   • Built-in real-time clock records measurement timestamps to meet regulatory compliance.
   • Expert wiring guidance system with intelligent fault diagnosis, enabling quick operation even for novices.

4. Multi-Layer Safety Protection, Risk-Free Operation

   • Output terminals withstand AC 100V/50Hz voltage, ensuring no damage to the device or PT during single-phase ground faults.
   • Integrated zero-sequence overvoltage protection and short-circuit protection for safe testing.

Technical Specifications

• Measurement Range:
  • Capacitance: 0.3μF–200μF
  • Current: 1A–400A
• Accuracy: ±(5% of reading + 2 digits)
• Power Supply: AC 100–240V, 0.8A, 50/60Hz
• Weight: 1.2kg
• Dimensions: 200mm × 100mm × 60mm
• Operating Temperature: -10°C to +50°C
• Relative Humidity: <90% RH (non-condensing)

Applications

• Power System Maintenance: Rapid detection of capacitive currents in 10kV/35kV grids to determine arc suppression coil requirements.
• PT Ferroresonance Diagnosis: Precise measurement of ground capacitance to prevent ferroresonance overvoltage risks.
• Field Commissioning & Fault Diagnosis: No need for power shutdowns or complex safety protocols—complete wiring and testing within 5 minutes.

Features & Specifications

• Enhanced Performance: Wider measurement range and faster test speed.
• High-Visibility Display: Industrial-grade 7-inch color LCD screen (800×480 resolution), readable under strong ambient light.
• User-Friendly Interface: Intuitive human-machine interaction design.
• Robust Protection: Multiple zero-sequence overvoltage protection circuits; output terminals withstand AC 100V, 50Hz without damage.
• Advanced Power System: Built-in digital variable-frequency inverter with precise output, high efficiency, low heat dissipation, compact size, lightweight, and stable long-term operation.
• Safety Features: Output short-circuit protection.
• On-Site Data Management: Integrated thermal printer for instant data printing.
• Time Stamping: Real-time clock displays current date/time; measurements include timestamps.
• Flexible Storage: Onboard storage (200 records) and USB flash drive compatibility.
• Portable Design: Compact and lightweight for ease of use in field operations.

Technical Specifications

• Measurement Range: 0.3μF～200μF, 1A～400A
• Accuracy: ±(5% of reading + 2 digits)
• Power Supply: AC 100–240V, 0.8A, 50/60Hz
• Net Weight: 1.2kg
• Dimensions: 200mm (L) × 100mm (W) × 60mm (H)
• Operating Temperature: -10°C to +50°C
• Relative Humidity: <90% RH, non-condensing

Key Notes:

1. Standardized Format: Uses international conventions (e.g., "±" for accuracy, "RH" for relative humidity).
2. Precision: Explicitly states measurement range limits and environmental tolerances.
3. Clarity: Units (μF, A, mm, °C) align with global engineering standards.
4. Safety Compliance: Highlights wide voltage input range (100–240V) for global usability.