NAGM Series adjustable high-voltage digital megger
Product introduction
NAGM Series adjustable high-voltage digital megger, also called High Voltage Insulation Resistence Tester, it is designed and developed for testing the insulation resistance of large high voltage transformer, electrical appliances, remote power cables or underground cable and others under strong interference in the high voltage substations or power plants. It can also be used for measuring electrical insulation resistance in broad areas.
NAGM Series adjustable high-voltage digital megger test high voltage, large power, and the tested object is often with power frequency leakage or the interference of high voltage electric induction, so for the safety of person, you should connect the grounding wire safety.

Also called name
Digital megger, digital megger,  insulation sheet, insulation resistance tester, high voltage insulation resistance tester, insulation resistance meter, insulation characteristics tester, electric shake table, digital shake table, the number of significant shake table, digital Megaohmmeter, digital Megaohmmeter, high voltage digital insulation resistance tester, digital high voltage insulation resistance tester, digital pressure megger, digital pressure megger, high voltage digital megger, digital insulation meter, digital insulation meter, electronic insulation resistance tester, digital insulation resistance tester, digital insulation resistance tester, digital insulation resistance tester, insulation resistance tester, digital electric megger, digital high megger, high-power high megger, NAGM Series adjustable high-voltage digital megger

The Characteristics of the products 
1 The instrument has very strong electric field induction interference resistance, can be up to 2mA (50Hz), it can adapt to the 500,000 V substation site, can test the insulation resistance of 500,000V large transformer without disconnection.
2 Test the short circuit current of power is greater than 5mA, the maximum is 15mA. Adapt to high capacity and large inductance test.
3 Wide range of resistance measurement, from 0.5MΩ to 2000GΩ, with accurate reading and high resolution.
4 Wide range of voltage measurement, 0.25kV, 0.5kV, 1kV, 2.5kV, 5kV, 10kV, 15kV can be optional, it can also continuous adjustment from 0V smoothly to the required voltage.
5 with time function to remind the users to record and analysis the absorption ratio and polarization index of the measured object.

The parameters of the products
1、Product specifications:

Model	Measuring voltage	Accuracy of voltage	Short circuit current
NAGM-5kV	0～0.25、0.5、1、2.5、5kV	±(5%+10V)	＞5mA
NAGM-10kV	0.5、1、2.5、5、10kV	±(5%+10V)	＞5mA
NAGM-15kV	1、2.5、5、10、15kV	±(5%+10V)	＞5mA
NAGM-20kV	0.5、1、2.5、5、10、20kV	±(5%+10V)	＞5mA

2、Measuring range and accuracy：

Measuring range (limit)	Resistance measurement range	Accuracy
20MΩ/500V	0.5～19.99MΩ	±(5%+5 word)
200MΩ/1000V	5.0～199.9MΩ	±(5%+5 word)
2GΩ	0.05～1.999GΩ	±(5%+5 word)
20GΩ	0.5～19.99GΩ	±(5%+5 word)
200GΩ/10kV、5kV	50～199.9GΩ	±(10%+10 word)
2000GΩ/20kV、15kV	50～1999GΩ	±(20%+10 word)

Standard rated voltage of GΩ range is 2.5kV.
3、Anti-electric interference: 2mA (50Hz)
4、The function of time and alarm: the stopwatch shows a maximum value of 19 minutes and 59 seconds, 20 minutes a cycle. The alarm time is about 15 seconds per minute or 60 seconds, the sound is short, the resistance reading keep 5 seconds, when the measured resistance is lower than the limit of the range, the reading is invalid, it can continuous alarm.
5、Display: three and half digit, three LCD digital meter respectively show the test voltage, resistance, time.
6、Power supply: enclosed 10 pieces of 1.2V/2000mAh rechargeable battery, DC12V. With AC 220V (50/ 60HZ) access to the battery charging or float charging.
7、Operating environment:
     Temperature: 0℃ ~ 40℃; Relative humidity: 20% ~ 90% RH
8、Size: 315mm×240mm×155mm
9、Weight: 5kg