TS2800 Surface Insulation Resistance Measurement and Analyzer for Electrical Steel Sheets

(Original model: TS1700)

*Above picture is only for reference, subject to actual delivery

1. Summary

TS2800 is a specialized system for measuring the insulation resistance performance of electrical steel sheet coatings.

It mainly consists of a test unit (including 10 contact points and metal rods/conductive rubber contacts, drill bit, electric cylinder, specimen tray, etc.), a measurement console, a system verification standard device, a computer, and testing software.

•      TS2800-A uses the Franklin method to automatically measure the surface insulation resistance coefficient of single electrical steel sheet.

•      TS2800-B adopts Tunkia’s patented conductive rubber contacts to automatically measure the surface insulation resistance coefficient of single electrical steel sheet, allowing soft contact between the contact points and the specimen. Compared to the Franklin method, this approach offers higher repeatability and comparability.

The system also supports manual flipping of specimens for measuring the interlayer resistance coefficient of electrical steel sheets.

2. Features

• Current output/measurement: Built-in DC stabilized power supply and precision current measurement unit, the measurement uncertainty is up to 0.1%.

• The voltage value can be stabilized at 500 mV during each measurement, and the loop current is measured synchronously, range: 0 ~ 1.2 A.

• Contact execution structure: It consists of 2 auger bits, 10 metal rods with contacts, and pressure devices.

• Standard contact (standard recommendation): The area of a single contact is about 64.5 mm², and the total area of 10 is 645 mm².

• Optional contact (optional): The area of a single contact is about 100 mm², and the total area of 10 is 1000 mm².

• TS2800-B Conductive Rubber Contact: This tip is made of conductive rubber with an area of 645 mm², enabling soft contact between the tip and the specimen. Compared with the Franklin method, it offers higher repeatability and comparability.

• The drill tip has excellent sharpness and can easily pierce the surface coating of electrical steel sheets under a certain pressure.

• The drill tip and the metal rod of the conductive rubber tip are both driven by electric cylinders, moving synchronously in the vertical direction to contact the specimen for testing.

• During testing, the surface pressure on each individual tip is approximately 2 N/mm². A pressure sensor is provided for real-time monitoring of the applied pressure.

• Specimen tray: Driven by a motor, it moves the specimen back and forth to locate multiple different test areas and obtain multiple sets of test data. One to five test points can be set via the software.

• System verification standard device: equipped with standard resistance circuit board for daily verification of the system.

• Mobile test console: Set test parameters through LCD touch screen, observe test status and results, easy to use.

• Professional testing software: In addition to setting parameters and placing specimens, other testing processes can be completed automatically through the software.

• The software can display the voltage value, current value and pressure value of the test in real time, and record each group of test data.

3. Reference Standard

• GB/T 2522-2017 Methods of Test for the Determination of Coating Insulation Resistance and Coating Adhesion of Electrical Strip and Sheet

• IEC60404-11 Magnetic materials - Part 11: Method of test for the determination of surface insulation resistance of magnetic sheet and strip

• ASTM A717 / A717M Standard Test Method for Surface Insulation Resistivity of Single-Strip Specimens

• JIS 2550-4-2011 Test methods for electrical steel strip and sheet -- Part 4: Methods of test for the determination of surface insulation resistance of electrical strip and sheet