The KD7742 intelligent withstand voltage insulation tester has testing and analysis functions for AC/DC withstand voltage, insulation resistance, and other items. It can display waveform and trend charts of voltage, current, and resistance for more intuitive monitoring and analysis of insulation performance and various indicators during insulation collapse. It is suitable for high demand testing and analysis occasions.


The product has the advantages of wide testing parameter range (3000V/100G Ω), large capacity (5KV/100mA), high accuracy (1%), and waveform display. Adopting touch screen design, easy to operate, intuitive display, and voice broadcasting function; Highly integrated functional circuits, small size and light weight; The test data is cached locally, and through WiFi communication and upper computer software, multiple instruments can be connected to one computer to achieve the upload, storage, and analysis of test data. The software also has practical functions such as interface monitoring and network disconnection continuation.

1. Compact size:

Portable design: The overall size is 132 × 284 × 470 (mm), with a height of 3U and a weight of 15Kg;

7-inch color touch screen, displaying measured values in large font.

2. Fully functional:

It has multiple testing functions such as insulation resistance and AC/DC withstand voltage, with multiple selection combinations.

3. High precision:

Test accuracy 1%

4. Fast speed:

Switching speed less than 0.1S, long lifespan, high reliability.

5. Wide range:

The insulation resistance test voltage is 100-3000V (optional 6000V), with a testing range of up to 100G Ω;

A smaller breakdown current can be accurately measured.

6. More compliant:

Voltage withstand capacity 500VA (5KV/100mA, short-term 200mA peak);

Equipped with DC withstand voltage and arc detection functions.

7. Practical functionality:

Capable of displaying waveform and trend charts of parameters such as voltage, current, and resistance;

Equipped with voice broadcasting function.

8. Informationization:

Test data stored locally;

Through WiFi communication and upper computer software, one computer can connect to multiple instruments to upload, store, export, and analyze test data;

Equipped with remote upgrade function.

9. Safer

Equipped with ground wire detection and protection functions for leakage, overcurrent, overheating, etc;

The function of quickly releasing residual power ensures the safety of testing personnel.

10. Easy to operate and use

7-inch color touch screen, indexed setting interface, easy to use, intuitive display;

Built in rich help information, convenient for operator training and on-the-job training;

There are two modes: administrator and tester. The administrator has pre-set parameter permissions, while the tester only has permissions and cannot make changes.

11. Easy to maintain

Modular design of functional circuits, simple and fast troubleshooting, solving after-sales problems;

Fault self diagnosis function, automatic diagnosis report fault module.

product name	AC/DC voltage withstand insulation analyzer
Model	KD7742
Random attachments	name	unit	number	notes
	Product manual	book	1
	Foot switch	cover	/	Matching
	Alarm lights	cover	/	Matching
	Power cord	root	1
	Test fixtures	cover	1
	Certificate	book	1
AC hipot test
	range	resolution		precision
Output voltage	100～5000VAC	1V		± (1% +5V)
Output frequency	50/60Hz
Breakdown current	0～100.00mA Short-term 200mA peak	0.001mA/0.01mA		±(1% + 0.002mA)
Ramp-up time	0～999.9s	0.1s		±(1% + 0.1s)
Slow descent time	0～999.9s	0.1s		±(1% + 0.1s)
Test time	0.5～999.9s	0.1s		±(1% + 0.1s)
Current compensation	0～99.999 mA	0.001mA/0.01mA
Arc detection	0～100.00mA	0.01mA		±5%
DC hipot test
	range	resolution		precision
Output voltage	100～6000VDC	1V		± (1% +5V)
Breakdown current	0～20.00mA	0.001mA		±(1% + 0.002mA)
Ramp-up time	0～999.9s	0.1s		±(1% + 0.1s)
Slow descent time	0～999.9s	0.1s		±(1% + 0.1s)
Test time	0.5～999.9s	0.1s		±(1% + 0.1s)
Ripple coefficient	<2%（6kV/1mA阻性负载）
Insulation resistance test
	range	resolution		precision
Output voltage	100～3000V	1V		± (1% +5V)
Insulation resistance	0.5M～100GΩ	0.01M/0.1M/1M/10M/100M/1G		0.60M~9.99M ±(1%示数+0.03M) 10.0MΩ~99.9MΩ ± (3% indication +0.3M) 100MΩ~9999MΩ ± (5% +3M) 10.0GΩ~100GΩ ±(15%示数+ 0.8G)
Ramp-up time	0～999.9s	0.1s		±(1% + 0.1s)
Slow descent time	0～999.9s	0.1s		±(1% + 0.1s)
Test time	0.5～999.9s	0.1s		±(1% + 0.1s)
Delay time	0～999.9s	0.1s		±(1% + 0.1s)
Controls & Interfaces
PLC switching quantity	Pass, fail, test
RS232	Standard
WiFi capability	Standard