Xi'an Xu&Hui Electromechanical Technology Co., Ltd.

China
Verified Supplier

Chat online Now



Leave a Message

we will call you back quickly!

Submit Requirement

Home>
Transformer Tester>
Single-Phase B Terminal DC Attenuation Demagnetizer 5A for 330kV High-Capacity

China Single-Phase B Terminal DC Attenuation Demagnetizer 5A for 330kV High-Capacity





Single-Phase B Terminal DC Attenuation Demagnetizer 5A for 330kV High-Capacity

MOQ： 1 Unit
Price： Negotiable
Get Latest Price


Demagnetization Efficiency	≥90% per cycle
Display	Backlit LCD Screen (Chinese/English)
Application Range	35kV and above, Especially 330kV+ High-Capacity Power & Instrument Transformers
Demagnetization Current	5A, 1A, 200mA, 5mA (Customizable)
Standard Accessories	Main Unit, Power Cable, 2x Test Cables, Ground Cable, 5x Spare Fuses (8A)
Supply Ability	500 Units per Month
Technology	DC Attenuation Frequency Conversion (Patented 3-Principle Approach)
Power Frequency	50Hz±1Hz
Weight	5kg (without test cables)
Demagnetization Progress	0~100% Real-time LCD Display
Operating Temperature	-25℃~50℃
Connection Method	Single B-Phase Connection for Complete Three-Phase Demagnetization
Working Power Supply	AC 220V±10%
Packaging Details	Aluminum alloy carrying case with custom foam padding, export-grade corrugated carton
Operating Humidity	≤90%
Payment Terms	T/T
Demagnetization Mode	Manual / Automatic
Demagnetization Time	Manual ≤3min/cycle, Automatic ≤9min/cycle
Data Acquisition	16-bit High-Precision AD with Auto Current Stabilization
Delivery Time	5-10 Working Days
Place of Origin	Xi'an, Shaanxi, China
Certification	CE, ISO
Brand Name	XZH TEST
Model Number	XHXC105

View Detail Information

Inquiry by Email Get Latest Price

Chat online Now Ask for best deal

Explore similar products

On-Load Tap Switch Tester Output Current 0.2A Suitable for Various Applications

Chat online Now
Portable Sfra Transformer Winding Deformation Tester for Advanced Technology

Chat online Now
Transformer Tester The Best Choice for On-Load Tap-Changer Testing Efficiency

Chat online Now
Electricity Transformer Low Voltage Short Circuit Impedance Tester with Printer

Chat online Now

Product Details
Company Details

Product Specification


Demagnetization Efficiency	≥90% per cycle	Display	Backlit LCD Screen (Chinese/English)
Application Range	35kV and above, Especially 330kV+ High-Capacity Power & Instrument Transformers	Demagnetization Current	5A, 1A, 200mA, 5mA (Customizable)
Standard Accessories	Main Unit, Power Cable, 2x Test Cables, Ground Cable, 5x Spare Fuses (8A)	Supply Ability	500 Units per Month
Technology	DC Attenuation Frequency Conversion (Patented 3-Principle Approach)	Power Frequency	50Hz±1Hz
Weight	5kg (without test cables)	Demagnetization Progress	0~100% Real-time LCD Display
Operating Temperature	-25℃~50℃	Connection Method	Single B-Phase Connection for Complete Three-Phase Demagnetization
Working Power Supply	AC 220V±10%	Packaging Details	Aluminum alloy carrying case with custom foam padding, export-grade corrugated carton
Operating Humidity	≤90%	Payment Terms	T/T
Demagnetization Mode	Manual / Automatic	Demagnetization Time	Manual ≤3min/cycle, Automatic ≤9min/cycle
Data Acquisition	16-bit High-Precision AD with Auto Current Stabilization	Delivery Time	5-10 Working Days
Place of Origin	Xi'an, Shaanxi, China	Certification	CE, ISO
Brand Name	XZH TEST	Model Number	XHXC105
High Light	Single-Phase B Terminal DC Attenuation Demagnetizer ，5A DC Attenuation Demagnetizer for Transformer ，330kV High-Capacity Power Transformer Demagnetizer

Single-Phase Transformer Demagnetizer|XHXC105 Patented DC Attenuation Technology for High-Capacity 330kV+ Power System Residual Magnetism Elimination

Product Overview

The XHXC105 Single-Phase Transformer Demagnetizer is engineered specifically for eliminating residual magnetism in high-capacity power transformers (35kV and above, especially 330kV+ units). Residual magnetism—caused by ferromagnetic hysteresis during DC resistance testing and voltage ratio measurements—is a critical pre-commissioning concern: energizing a magnetized transformer can cause half-cycle saturation, generate massive harmonic inrush currents, trigger protective relay misoperation, and in severe cases precipitate cascading substation blackouts.

The XHXC105 addresses this with a patented DC attenuation frequency conversion technology incorporating three synergistic principles: (1) periodically reversing DC current polarity, (2) progressively decreasing current amplitude through 5A → 1A → 200mA → 5mA stages, and (3) systematically shrinking magnetic hysteresis loops via alternating pole cancellation. A single B-phase connection is sufficient to demagnetize all three phases—a unique field advantage—achieving over 90% efficiency in a single pass compared to 80% with conventional methods. The 5kg portable design, 16-bit AD data acquisition, and intuitive dual-button operation make it the ideal tool for substation commissioning and transformer manufacturing quality control.

XHXC105

Key Features

Patented 3-Principle DC Attenuation: Reversing polarity + decreasing current amplitude + shrinking hysteresis loops for superior demagnetization
Single B-Phase Connection: Connect only to the B-phase terminal and neutral—demagnetization effect propagates across all three phases
5A Multi-Current Sequencing: Automatic progression through 5A, 1A, 200mA, and 5mA stages with intelligent current selection
90%+ Single-Pass Efficiency: Achieves over 90% residual magnetism elimination in one cycle vs. 80% with conventional approaches
Rapid Under-4-Minute Cycles: Automatic mode completes full demagnetization in under 4 minutes—down from 30 minutes traditionally
Dual-Mode Operation: Automatic intelligent sequencing for routine use; manual mode with selectable current levels for targeted treatment
16-Bit AD Precision: High-resolution data acquisition with automatic current stabilization for consistent measurement accuracy
Real-Time Progress Display: Backlit LCD with Chinese/English support shows 0-100% progress and operating status
Compatible with Standard Test Leads: Directly connects to existing DC resistance test current leads for seamless workflow integration
Ultra-Portable 5kg Design: Compact and lightweight for easy single-person transport between substation sites and manufacturing bays

Technical Specifications

Demagnetization Performance
Technology	DC Attenuation Frequency Conversion (Patented 3-Principle)
Demagnetization Current	5A, 1A, 200mA, 5mA (Customizable)
Demagnetization Mode	Manual / Automatic
Demagnetization Time	Manual ≤3min/cycle, Automatic ≤9min/cycle
Demagnetization Efficiency	≥90% per cycle (Single-Pass)
Demagnetization Progress	0~100% Real-time LCD Display
Connection Method	Single B-Phase + Neutral (Propagates to All Phases)
Hardware & Display
Data Acquisition	16-bit High-Precision AD with Auto Current Stabilization
Display	Backlit LCD Screen (Chinese/English)
Operation	2-Button: Red (Select/Reset) + Green (Confirm/Start)
Weight	5kg (without test cables)
Operating Specifications
Working Power Supply	AC 220V±10%
Power Frequency	50Hz±1Hz
Operating Temperature	-25℃ ~ 50℃
Operating Humidity	≤90%
Application Range
Transformers	35kV+, Especially 330kV+ High-Capacity Power & Instrument Transformers
Standard Accessories	Main Unit, Power Cable, 2x Test Cables, Ground Cable, 5x Spare Fuses (8A)

Frequently Asked Questions

Q1: What makes the XHXC105 suitable for 330kV+ high-capacity transformers?

The XHXC105's patented three-principle DC attenuation approach is particularly effective for large-core transformers where residual magnetism is more pronounced and harder to eliminate. The 5A high-current initial stage rapidly saturates the core, while the progressive current reduction (5A→1A→200mA→5mA) systematically shrinks hysteresis loops. For 330kV+ units with massive core cross-sections, the single B-phase connection is sufficient to propagate demagnetization through all phases via magnetic coupling—a field-proven advantage that eliminates the need for complex multi-phase connection schemes on high-voltage bushings.

Q2: How does the single B-phase demagnetization work for three-phase transformers?

The XHXC105's patented technology exploits the magnetic coupling between transformer phases. When DC attenuation demagnetization is applied to the B-phase (center leg in a three-phase core), the alternating magnetic flux propagates through the core structure to the A and C phases, achieving complete demagnetization of all three phases from a single connection. For transformers with uncertain residual magnetism distribution, sequential AB, BC, and CA demagnetization is also supported. The output terminals are non-polarized, simplifying field connection and reducing setup time.

Q3: Why does the XHXC105 need only 4 minutes when traditional methods take 30 minutes?

Traditional DC demagnetization methods apply a constant current with periodic manual polarity reversal—an inherently slow process where each cycle only partially reduces residual flux. The XHXC105's patented frequency conversion technology accelerates this by simultaneously applying three effects: (1) automated high-frequency polarity reversal, (2) dynamic current reduction across four stages optimized for each magnetic state, and (3) intelligent hysteresis loop detection that adjusts the attenuation rate in real-time. The 16-bit AD system continuously monitors core state, terminating the process immediately when >90% elimination is achieved rather than running a fixed-duration cycle.

Q4: How does residual magnetism affect power system reliability?

Residual magnetism poses eight critical risks to power systems: protective relay misoperation causing repeated commissioning failures, voltage surges during fault clearing triggering widespread trips, sympathetic inrush currents propagating between adjacent substations (potential cascading blackouts), electro-dynamic stress damaging windings and circuit breakers, switching overvoltage damaging connected equipment, DC component saturation of current transformers degrading measurement accuracy, harmonic pollution compromising grid quality, and voltage instability affecting adjacent equipment. For 330kV+ backbone transmission transformers, these risks carry national grid stability implications, making pre-commissioning demagnetization an essential safety protocol.

Q5: What are the MOQ, delivery terms, and after-sales support for the XHXC105?

The minimum order quantity is 1 unit, with payment via T/T or L/C. Standard delivery is 5-10 working days in a protective aluminum alloy carrying case. Annual supply capacity reaches 500 units per month. Each instrument includes a 12-month comprehensive warranty covering manufacturing defects with lifetime technical support and repair services. Custom current ranges and OEM/ODM configurations are available upon request. Standard accessories include the main unit, power cable, 2 test cables, ground cable, and 5 spare fuses (8A). For volume pricing or technical consultation, please contact our sales team.

Company Details

Bronze Gleitlager

Bronze Sleeve Bushings

and

Graphite Plugged Bushings

from Quality China Factory



Business Type:

Manufacturer 


Year Established:

2013 


Total Annual:

1000000-5000000


Employee Number:

50~100 


Ecer Certification：

Verified Supplier 

Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd. Has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical... Xi'an Xu&Hui Electromechanical Technology Co., Ltd. /Xian XZH Electric Power Technology Co., Ltd. Has found in 2013, located in Xi'an, China. which is a highly experienced team dedicated to developing electrical...

+ Read More

Reach Us
Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
Building B8-01, Phase I, Ronghao Industrial City, No. 2098, Weiyang 9th Road, Gaoling District, Xi'an, China
https://www.xzhtest.com/

Chat online Now

Leave a Message, we will call you back quickly!