Portable Fast Automatic Power Transformer Degaussing Demagnetization Instrument

The XHXC105 Transformer Degaussing Instrument is a specialized device designed to eliminate residual magnetism hazards that remain in transformer cores after DC resistance testing, voltage ratio measurements, and other diagnostic procedures. It plays a critical role in protecting power transformers from excitation inrush current impact and ensuring safe, reliable commissioning of transformers at 35kV and above — particularly large-capacity units at 330kV+ voltage levels.

Built on patented DC frequency conversion attenuation technology, the XHXC105 introduces an automatic degaussing mode alongside manual operation, eliminating repetitive user intervention. The enlarged LCD module displays richer operational information including real-time degaussing current, mode status, and progress percentage. A refined two-button interface — red for selection and reset, green for confirmation and start — simplifies field operation. Degaussing cycle time has been reduced from 30 minutes to under 4 minutes, with single-pass effectiveness exceeding 90%.

• Patented DC Frequency Conversion Attenuation: Proprietary technology progressively reduces current amplitude while alternating polarity, gradually shrinking the hysteresis loop and neutralizing residual magnetic poles for thorough demagnetization.
• B-Phase Only Three-Phase Degaussing: A single connection to the B-phase bushing achieves complete demagnetization of all three phases — dramatically reducing on-site setup time and eliminating the need for multiple reconnections during transformer commissioning.
• Dual-Mode Operation: Automatic mode sequentially applies 5A, 1A, 200mA, and 5mA current levels with zero user intervention. Manual mode provides individual current-level selection for targeted degaussing based on residual magnetism severity.
• 16-Bit AD Data Acquisition: High-resolution analog-to-digital conversion with automatic current stabilization judgment ensures precise degaussing current control and repeatable results across varying field conditions.
• Sub-4-Minute Cycle Time: Single-pass degaussing completes in under 4 minutes (manual) or 9 minutes (automatic full-cycle) — a dramatic improvement from the 30-minute cycles of previous-generation instruments, enabling efficient multi-transformer commissioning schedules.
• DC Resistance Test Cable Compatibility: Directly reuses the current leads from DC winding resistance testing, streamlining the transition from diagnostic testing to degaussing without cable changes.
• Compact Field Design: Weighing only 5 kg (excluding test leads), the XHXC105 is purpose-built for mobile deployment across substation sites with minimal setup effort.

The instrument employs DC frequency conversion attenuation: (1) DC degaussing current is applied; (2) Current amplitude decreases periodically; (3) Current polarity alternates periodically; (4) The hysteresis loop is progressively narrowed and magnetic poles are mutually canceled to achieve complete demagnetization.

1. Read the user manual thoroughly and verify correct wiring before operation.
2. Ensure the ground terminal is reliably connected before powering on.
3. Do not remove test clamps during the degaussing process.
4. In any abnormal situation, press the red RESET button or turn off the power switch immediately.
5. This is a precision high-voltage electronic instrument — non-professionals must not disassemble; handle with care during transport.