Large Capacity Lithium Battery Winding Resistance Tester for Inspection of Small And Medium-sized Transformers

Large Capacity Lithium Battery Winding Resistance Tester for Inspection of Small And Medium-sized Transformers

Introduction：

GDZC-10A High-Capacity Lithium-ion Battery Transformer Winding DC Resistance Testing Equipment

This machine adopts the four-terminal method testing principle, eliminating measurement deviations caused by lead resistance and contact resistance. The entire machine integrates a high-capacity lithium-ion battery power supply unit, allowing for complete transformer winding DC resistance testing even without mains power. It features a full-color touchscreen operation screen and supports data export via in-machine printing, SD card, and USB. For high-inductance test objects such as transformers, it performs an automatic magnetization-stabilization measurement-safe discharge process for induced energy in the windings, avoiding the risk of injury from induced high voltage.

Features：

→1. Built-in high-capacity lithium battery, freeing you from mains power constraints.

→2. Standard four-terminal measurement architecture, avoiding contact interference errors.

→3. Intelligent charging and discharging of large inductive loads and safe winding discharge.

→4. Full-color touch screen interaction, integrated automatic winding temperature calculation.

→5. Multi-mode local data retention and output, supporting on-board thermal printing of paper reports; SD card storage of test records; USB direct connection to a computer for direct recognition as a removable disk, allowing direct copying of original test data.

→6. Industrial-grade protective portable unit with a high-strength protective chassis, suitable for frequent transport.

→7. Complete on-site operation and verification capabilities, customizable test numbering for easy differentiation and recording of multiple transformers and multi-phase windings.

Product Functions

Winding DC Resistance Measurement

1. Phase-by-phase DC resistance measurement of transformer high and low voltage windings; identifies loose connections, poor tap changer contact, and broken strands in windings.

2. Four-terminal anti-interference measurement, suitable for phase-by-phase testing of small-capacity distribution transformers to medium and large-sized power transformers.

3. Winding Resistance Temperature Conversion: Selectable copper/aluminum material; input measured temperature for automatic conversion to resistance value at the target standard temperature.

Data Management Functions

• Customizable test numbers for marking and archiving different tested equipment.

• Local storage of up to 1000 test records; supports record query and preview.

• In-machine thermal printing of on-site paper test reports for direct on-site verification.

• SD card storage of test data; USB direct connection to computer for direct file copying without dedicated software.

System Auxiliary Functions

1. System time setting and calibration; timestamps on each record for traceable test data.

2. Automatic magnetization of large inductive loads; reading stability assessment; safe discharge of induced energy from windings at test completion.

3. Lithium battery power management; dedicated charger for charging; battery usage reminders for long-term storage and maintenance.

   

Product Applications

1. Substation Operation and Maintenance: Annual preventative testing of distribution transformers and small to medium-sized main transformers; post-fault diagnosis; winding resistance verification after tap changer maintenance; emergency repairs in the field when there is no mains power; phase-by-phase winding DC resistance testing.

2. Transformer Manufacturers: DC resistance testing of small to medium-sized transformer windings at the factory, testing under semi-finished product conditions, and testing in workshops and temporary testing stations.

3. EPC Power Engineering Contractors: Handover testing of newly built substations and on-site testing for projects with limited power supply.

4. Third-Party Testing Agencies: On-site testing services to address unstable power supply conditions at construction sites.

5. Industrial and Mining Power Plants and Substation Electrical Teams: Regular calibration of internal high-voltage transformers.