Portable Transformer Winding Resistance Tester Lightweight Dual Channel Rapid Measuring Instrument for Field Substation Inspection Repair Operations & Heavy Duty Electrical Diagnostics

Product Description

20A DC Winding Resistance Tester

The SX-20A is a professional transformer winding resistance tester developed for DC resistance measurement during transformer production and electrical testing. It is designed to support routine inspection and quality control of transformer windings throughout the manufacturing process.

DC resistance testing helps manufacturers identify problems related to winding materials, welding points, electrical connections, missing strands and broken wires. It is also an important test during transformer installation, handover and preventive maintenance.

The SX-20A adopts a new power supply technology and microprocessor control system. With six output current options and a measuring range of 100μΩ to 100kΩ, it accommodates different inductive winding resistance measurement requirements.

Product Features

• Maximum 20A output current for different winding resistance measurements.
• Six current selections to accommodate various test requirements.
• Fast response and automatic data refreshing.
• Supports on-load tap changer switching during measurement.
• Automatic discharge and audible discharge warning.
• Complete protection against back electromotive force.
• 7-inch color LCD with a clear operating interface.
• Built-in printer for real-time test result printing.
• Stores up to 500 measurement records.
• Adjustable test parameters, including winding, tap position, test phase and temperature.

Applications

The SX-20A can be used in:

• Transformer manufacturing factories
• Transformer quality inspection departments
• Electrical equipment production facilities
• Transformer installation and commissioning projects
• Power utility maintenance departments
• Testing laboratories

It is suitable for transformer, CT, PT, reactor and other inductive coil DC resistance testing.

Technical Parameters

FAQ

Q1: Why is DC resistance testing important in transformer manufacturing?

A: It helps detect potential winding defects, including poor welding, loose connections, missing strands and broken wires.

Q2: Can the SX-20A be used during transformer factory testing?

A: Yes. It is designed for transformer manufacturing inspection, finished-product testing, installation and handover testing.

Q3: Does it support tap changer testing?

A: Yes. The instrument can automatically refresh measurement data when switching the on-load tap changer during the measurement process.

Q4: Can users record transformer temperature and tap position?

A: Yes. Users can configure winding, tap position, test phase, sample temperature and reference temperature.

Q5: How many test records can be stored?

A: The instrument can store up to 500 test records.