Home > Products >

Portable Single Three Phase 20A Transformer DC Winding Resistance Meter

Name: Portable Single Three Phase 20A Transformer DC Winding Resistance Meter
Brand: Xi'an Xu&Hui Electromechanical Technology Co., Ltd.
SKU: XHZ1320A
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:	XHZ1320A

Detail Information

Place of Origin:

Xi'an, Shaanxi, China

Brand Name:

XZH TEST

Certification:

ISO,CE

Model Number:

XHZ1320A

Voltage:

220V

Function:

DC Resistance Test For Transformer, Motor; Magnetic Assist And Demagnetization

Keyword:

DC Winding Resistance Tester

Output Current(single Phase):

20A, 10A, 5A, 1A, 0.1A, 10mA, <1mA

Output Current(three Phase):

10A+10A, 5A+5A, 1A+1A, 0.1A+0.1A

Highlight:

High Light

Highlight:

20A Three-Phase Simultaneous Testing

Magnetic Assist Demagnetization Function

7-Inch Touch with Jog Dial

Trading Information

Minimum Order Quantity:

1 unit

Price:

Negotiable

Packaging Details:

wooden case

Delivery Time:

8-10 days

Payment Terms:

T/T

Supply Ability:

1200 PCS/Year

Product Description

🎯 Target Application: Engineered for transformer manufacturing QA/QC departments and substation commissioning engineers who need rapid, high-current DC resistance verification during factory acceptance testing (FAT), new installation commissioning, and post-repair validation. Distinguishing from routine field maintenance testers, the XHZ1320A emphasizes magnetic assist technology, three-phase simultaneous testing, and automated demagnetization for high-throughput production-line and commissioning workflows.

XHZ1320A Portable 20A DC Winding Resistance Tester

For the power system, the transformer is the core equipment, and its long-term reliable operation is critical to the stability and reliability of the entire system. DC resistance measurement is a mandatory test item for semi-finished products, finished product factory testing, installation, handover testing, and preventive maintenance by power utilities. It effectively detects manufacturing defects such as improper material selection, poor welding, loose connections, missing strands, and broken wires in transformer coils, as well as operational defects and hidden hazards.

To meet the demand for rapid DC resistance measurement, the XHZ1320A integrates magnetic assist testing, three-phase simultaneous measurement (Yn, Y, △), and automatic demagnetization into a single portable instrument. It is the ideal solution for measuring DC resistance in large power transformers. Featuring a 7-inch industrial-grade true-color touch display with jog dial control, a Chinese/English menu interface, and one-time wiring for complete DC resistance testing, the XHZ1320A delivers fast testing speed, high accuracy, and an ultra-wide measurement range.

Key Features

Three-Phase Simultaneous Testing: Supports Yn, Y, and △ winding configurations with automatic three-phase unbalance rate calculation, eliminating the need for repeated single-phase measurements.
Magnetic Assist Technology: Reduces winding saturation time for large transformers, significantly shortening test duration without compromising accuracy.
Built-In Demagnetization: Automatic demagnetization function eliminates residual magnetism after DC testing, protecting transformer core performance and downstream equipment.
Stability Analysis: Automatically calculates resistance change rates at 5S, 15S, and 30S intervals, assisting operators in verifying data stability and preventing erroneous readings.
Comprehensive Protection: Features anti-back EMF protection, wire break detection, and power failure protection to ensure operator safety and instrument integrity.
Data Management: Built-in storage for 200 test records with USB mass storage support (FAT/FAT32); integrated thermal printer for on-site report generation.
7-Inch Industrial Display: High-resolution 1024×600 true-color touch screen with jog dial control for comfortable human-machine interaction in field conditions.

Technical Specifications

Output Current	Single Phase: 20A, 10A, 5A, 1A, 0.1A, 10mA, <1mA Three Phase: 10A+10A, 5A+5A, 1A+1A, 0.1A+0.1A
Measurement Range	Single Phase: 0.5mΩ~25kΩ (multi-range) \| Three Phase: 0.5mΩ~80Ω
Accuracy	±(Reading × 0.2% + 2 words)
Power Supply	AC220V±10%, 50/60Hz
Operating Temperature	-10℃～50℃
Relative Humidity	<90%, Non-Condensing
Dimensions	400 × 315 × 223 mm
Weight	9 kg
Display	7.0" Color LCD Touch Screen, 1024×600 Resolution
Internal Storage	200 Records (Expandable via USB)

Panel Layout

High Voltage Terminals	Connect to transformer high-voltage side bushings (A, B, C, O)
Low Voltage Terminals	Connect to transformer low-voltage side bushings (a, b, c, o)
Capacitive Touch Screen	7.0" display, 1024×600 resolution, full touch operation
Jog Dial Control	One-button flywheel for all instrument functions
Ground Terminal	Must be reliably grounded; remove paint or rust from ground point
Power On/Off	Press and hold for approximately 2 seconds to start up
Thermal Printer	Built-in printer for on-site test report generation
USB Interface	External USB flash drive (FAT/FAT32); do not remove during data transfer

XHZ1320A

Frequently Asked Questions

Q1: What winding configurations does the three-phase testing support?

The XHZ1320A supports Yn (star with neutral), Y (star without neutral), and △ (delta) winding configurations. For Yn windings, three-phase DC resistance is measured simultaneously. For Y and △ windings, three-phase measurements are performed sequentially in a single wiring setup. The instrument automatically calculates the three-phase unbalance rate for all configurations, streamlining QA/QC reporting for transformer manufacturers.

Q2: How does magnetic assist technology improve testing efficiency?

Magnetic assist applies a controlled auxiliary current to pre-saturate the transformer core, dramatically reducing the time required for the DC test current to stabilize when measuring large power transformers with high inductance windings. This is particularly valuable in manufacturing QA environments where throughput is critical — reducing per-unit test time by up to 60% compared to conventional DC resistance testers without compromising measurement accuracy.

Q3: Is automatic demagnetization necessary after DC resistance testing?

Yes. DC resistance testing inherently magnetizes the transformer core, which can cause inrush current surges upon re-energization, interfere with subsequent diagnostic tests, and potentially damage connected equipment. The XHZ1320A includes a built-in automatic demagnetization function with selectable current levels (1A, 5A, 10A) that systematically removes residual magnetism. The progress bar provides real-time feedback and completes automatically, requiring no manual intervention.

Q4: What safety protections are built into the instrument?

The XHZ1320A features multiple layers of protection: anti-back EMF protection safeguards the instrument when inductive loads discharge; wire break detection immediately alerts operators to open-circuit conditions in test leads; power failure protection ensures test data is preserved if mains power is interrupted. Additionally, the ground terminal must be reliably connected before operation, and the instrument provides visual warnings for improper grounding conditions.

Q5: What data management and export capabilities does the tester provide?

The instrument stores up to 200 test records internally, each containing complete test parameters including winding configuration, tap position, test current, measured resistance values, temperature-compensated values, 5S/15S/30S stability analysis, and three-phase unbalance rate. Data can be printed directly via the built-in thermal printer or exported to a USB flash drive (FAT/FAT32 format) for transfer to PC-based reporting systems. The record query interface supports browsing, viewing, deletion, and selective export of stored test data.

Tags:

Portable Single Three Phase 20A Transformer DC Winding Resistance Meter

High Light

Highlight:

20A Three-Phase Simultaneous Testing

Magnetic Assist Demagnetization Function

7-Inch Touch with Jog Dial

20A winding resistance tester,

DC winding resistance tester,

DC winding resistance meter

Customized Transformer Insulation Oil Acid Value Tester Automatic Oil Testing Machine

Transformer Winding Deformation Tester with FRA Technology| XHBX1501

Transformer Winding Deformation Tester with FRA Technology| XHBX1501

Transformer DC Resistance Tester for Large Power Transformers

Portable Fast Automatic Power Transformer Degaussing Demagnetization Instrument

Single Phase Three Phase 20A Transformer DC Winding Resistance Tester| XHZ1320A

Edgetech Trace Moisture Analyzer for Transformers| XHWS180