Product Introduction

Its main business is the production, manufacture and sales of electrical equipment and testing instruments.

I. Summary

Transformer DC resistance is the required test item of semi-finished products, finished product factory test, installation, overhaul, change of tap switch, handover test and power department preventive test of the transformer in transformer manufacturing. It can check the welding quality of the winding joint and whether the winding is an inter-turn short circuit, detect whether each position of the voltage tap switch is good, whether the actual position of the tap switch is consistent with the indicated position, whether the lead line is broken, and whether multiple strands are broken. In order to meet the needs of rapid measurement of transformer DC resistance, the HZ-3140A DC resistance tester developed by our company. The instrument adopts the new power supply technology, which has the characteristics of small volume, light weight, large output current, good repeatability, strong anti-interference ability and perfect protection function. The whole machine is controlled by high-speed Scontroller with high degree of automation and automatic discharge and discharge alarm function. The instrument test has high accuracy and simple operation, and can realize the rapid measurement of transformer direct resistance.

II. The Key Technical Indexes

item	technical indicators and parameters	remarks
test current	<20mA、2.5A、5A、10A、20A、40A
measuring range	50μΩ～500mΩ （40A） 100μΩ～1Ω （20A） 500μΩ～2Ω （10A）　　1mΩ～4Ω （5A） 2mΩ～8Ω (2.5A）	accuracy：±(0.2%+2word)
measuring range	10Ω-20KΩ （<20mA）	accuracy：±(0.5%+2word)
meminimum resolution solution	0.1μΩ

indication	liquid crystal display	the resistance shows a valid number of 4 digits
data storage	1000 Groups
work environment	Ambient temperature: 0℃ ~40℃ relative humidity: <90% RH, no condensation
power suply	AC 220V±10V，50Hz±1 Hz	protective tube 10A
maximum power dissipation	500W
external dimensions	main engine：405×230×355（mm） Wiring box：360×260×180（mm）
weight	main engine15.1KG Wiring box: 5.75KG
test line length	standard configuration13metre	length can be customized

III. Functional Characteristics

1, The whole machine is controlled by high-speed Scontroller, with high degree of automation and simple operation.

2, the instrument adopts a new power supply technology, more current gear, wide measurement range, suitable for the DC resistance measurement of large and medium-sized transformers.

3, the protection function is perfect, can reliably protect the impact of the reverse potential on the instrument, the performance is more reliable.

4, with sound discharge alarm, discharge indication is clear, reduce misoperation.

5, intelligent power management technology, the total work of the instrument in the minimum power state, effective energy saving, reduce heating.

6,7 inches high brightness touch color LCD, clear display under strong light, full touch screen operation, free switch between Chinese and English.

7, the instrument comes with a ten thousand calendar clock and power drop storage, can store 1000 sets of test data, can be consulted at any time.

8, the instrument has Bluetooth communication, RS232 communication and USB interface, used for computer communication and U disk data storage.

9, with a panel micro printer, can print measurement results.

10, The instrument can use Android phone or tablet, follow the wechat official account, download the special APP, control the whole instrument through special software, and test the data and upload it for convenient access.