Product Introduction

DC resistance of transformer is one testing item which must be tested during ex-work test of semi-finished products and final products, installation, acceptance test and preventive test of electric power department, which can effectively find out material selection of transformer coil, welding, looseness of connection part, missing strand, broken wire etc manufacturing defect and existing hidden problems after operation. In order to meet rapid measurement demand of transformer DC resistance, our company has researched and developed new generation resistance testing instrument on basis of its own technology advantage. The instrument applies new brand power technology, which is characterized with small volume, light weight, big output current etc. The whole machine is controlled by single chip microcomputer, which has automatic self-inspection, data treatment, display, automatic discharge and discharge indication etc functions. Testing accuracy of instrument is high, operation is easy and simple, it can realize rapid measurement of transformer DC resistance.

Product Features

l  Output current of the instrument (maximum output can reach 20A) is big, weight is light and carrying is convenient.

l  Measurement scope is wide（0Ω-24Ω）, measure transformer, current and voltage transformers etc all inductive DC resistance.

l  With perfect protection circuit, reliability is strong. Large colourful screen, display data is clear, legible.

l  Have audible discharging alarm, discharging indication is clear and misoperation is reduced.

l  The machine has protection and alarm function to protect input against misconnection with AC 380v power supply, reduce damage on the instruction caused by misoperation.

Technical Specifications

1.    Output current: 20A, 10A, 3A, 1A

2.    Measuring scope:                1mΩ～1Ω                          （20A）

                                                   2mΩ～2Ω                          （10A）  

                                                   6mΩ～8Ω                          （3A）

                                                   20mΩ～24Ω                      （1A）

3.    Accuracy: 0.2%±0.3μΩ

4.    Minimum resolution: 0.1μΩ

5.    Working temperature: -20～40℃

6.    Ambient humidity: ≤80%RH

7.    Working power supply: AC: AC230V±10%, 50Hz±1Hz

8.  Dimensions(WHD): 420mm × 340mm × 200mm

      9.    Weight: 10kg