Selection of 4 Transformer Winding Deformation Testers(SFRA) covering All-Scenario in 2026

• Frequency response range: 10Hz～10MHz, up to 40,000 sweep points, resolution 0.25kHz
• Amplitude measurement range: -120dB～+20dB, accuracy ≤1dB
• Impedance measurement accuracy: Voltage 0.2%, Current 0.2%
• Output signal: ±20V, frequency accuracy ≤0.01%

Its advantages lie in the integration of frequency response and impedance measurement, with a built-in industrial computer operating independently, supporting three-phase automatic analysis and Word report generation. Suitable for provincial power research institutes and maintenance companies to establish long-term databases.

• Frequency range: 100Hz～2MHz
• Resolution: 0.1kHz
• Frequency response resolution: 0.1dB
• Single-phase test time: Approximately 60 seconds
• Built-in FLASH can store 1000 sets of data.

Employs 32-bit ARM+DDS technology, a 10.1-inch touchscreen, and can be operated without a computer. Lightweight and compact (415×350×140mm), suitable for maintenance team inspections and rapid troubleshooting at new energy power plants.

• Frequency Sweep Range: 10Hz～10MHz
• Frequency Accuracy: 0.005%
• Amplitude Accuracy: 0.1dB
• Repeatability: 99.9%
• Weight: 20kg

Supports both linear and segmented frequency sweep modes, can load up to 6 curves for comparison, and features an expert intelligent diagnostic system. Suitable for comparative analysis before and after major transformer overhauls.

Based on the BRY03, the impedance method module is enhanced:

• Impedance Range: 0～100%
• Voltage Measurement: 25V～500V
• Current Measurement: 0.1A～10A
• Three-phase automatic measurement error criterion: Phase-to-phase ≤2.5%, In-phase ≤2%

Supports internal/external power supply switching, automatically determines if the current exceeds 10A, avoiding the risk of incorrect connection. Suitable for rapid re-inspection after short circuits in 110kV and above transformers.