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Industrial Grade DC Demagnetizing Unit for Direct Current Line Integration

Name: Industrial Grade DC Demagnetizing Unit for Direct Current Line Integration
Brand: Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
SKU: XHXC110
Price: 4,115.00 USD
Availability: InStock

Product Details:

Place of Origin:	Xi'an Shaanxi China
Brand Name:	XZH TEST
Certification:	ISO CE
Model Number:	XHXC110

Detail Information

Place of Origin:

Xi'an Shaanxi China

Brand Name:

XZH TEST

Certification:

ISO CE

Model Number:

XHXC110

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Direct Current Line Integration DC Demagnetizing Unit

DC Resistance Testing Compatibility Transformer Demagnetizer

Industrial Grade Demagnetization Device

Trading Information

Minimum Order Quantity:

1set

Packaging Details:

wooden packaging

Delivery Time:

5-8 work days

Payment Terms:

T/T

Supply Ability:

3000unit/year

Product Description

XHXC110 Demagnetizer for Power Transformers & CTs

The XHXC110 is a specialized tool for eliminating residual magnetism in large power transformers and current transformers post DC resistance testing. It is essential for shielding these assets from inrush current damage and enabling safe, reliable commissioning.

Ferromagnetic materials exhibit hysteresis, so residual magnetism lingers in transformer iron cores after tests like turns ratio and DC resistance measurements. When the transformer operates, this residual magnetism saturates half the iron core cycle, creating heavy harmonics in excitation current. This boosts reactive power use and risks relay protector misfires—leading to costly downtime. Demagnetization before commissioning is thus mandatory for stable transformer performance.

Upgraded from our original series, the XHXC110 offers automatic demagnetization (no repetitive 操作 for users), a larger LCD screen for enhanced data visibility, and intuitive two-button control: red for select/reset, green for confirm/start. Demagnetization time is cut from 30 minutes to under 4 minutes for faster workflows.

Industrial Grade DC Demagnetizing Unit for Direct Current Line Integration 0

Performance Characteristics:

Utilizes patented technology – DC frequency conversion attenuation principle;
Three-phase transformers achieve demagnetization by demagnetizing only phase B;
Features automatic current stabilization judgment and 16-bit AD data acquisition and processing;
Offers manual/automatic demagnetization modes;
Fast demagnetization speed – reduced from 30 minutes to no more than 4 minutes per cycle;
Significant demagnetization effect – increased from 80% to over 90% per cycle; Can directly utilize the current line of DC resistance testing, facilitating integration with DC resistance testing;
Suitable for eliminating residual magnetism in large power transformers and instrument transformers of 35kV and above before commissioning;
especially suitable for large-capacity transformers with voltage levels of 330kV and above;
This product is small in size and lightweight, making it ideal for field use.

Industrial Grade DC Demagnetizing Unit for Direct Current Line Integration 1

Risks of Residual Magnetism

Relay protection misoperation leads to repeated transformer commissioning failures;
Voltage surges from short-circuit fault clearance trigger protection misfires, shutting down all transformer-side loads;
Inrush current from an unloaded Substation A transformer causes "sympathetic inrush" in nearby Substations B/C transformers, leading to mis-tripping and widespread outages;
Excessive electric power from inrush current damages transformers and circuit breakers;
Switching overvoltage induced by residual magnetism harms electrical equipment;
DC components in inrush current over-magnetize CT magnetic circuits, degrading measurement precision and relay protection reliability;
Harmonics in inrush current contaminate grid power quality;
Grid voltage fluctuations (spikes/drops) disrupt other electrical equipment operation.

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Industrial Grade DC Demagnetizing Unit for Direct Current Line Integration

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