Introduction to DC grounding verification and protection misoperation analysis tester

HN7127DC grounding inspection and protection misoperation analysis tester

3．device characteristics

1．High reliability design

Hardware reliability:

The device is imported32The microcontroller serves as the main system, and the hardware design strictly follows electromagnetic compatibility standards. Multiple redundant methods are used internally to ensure the reliability of the device and the tested equipment.

Software reliability:

Multiple protection modes and prompt modes have been introduced in the software, and a testing time function has been added to the testing project. After the testing reaches the set time, the testing state will be automatically released, allowing the tested system to return to normal

2．Precision material selection

The device voltage sampling adopts high-precision imported analog-to-digital conversion chips to ensure high-precision sampling requirements;

The grounding resistor array of the device adopts high-precision and high-power resistors to ensure high control accuracy requirements.

3．Humanized human-computer interaction interface

The device adopts7The inch true color LCD screen and high-resolution touch screen serve as the core of the human-computer interaction interface, providing comfortable use and convenient operation;

The device introduces multiple input forms of check boxes in the settings interface, allowing users to easily set various complex combination function items with just one click;

The humanized human-machine interface also includes friendly user prompts. During the testing of some functional items, detailed prompts will appear on the LCD interface to guide the smooth completion of the testing process.

4Intelligent testing process

The parameter setting interface has a multi-point setting function, which allows users to select multiple test points with just one finger. Users can select up to five test points for continuous testing;

During the multi-point testing process, users can set the testing time interval. After setting the time interval, press start testing, and the device will automatically complete the verification work of multiple testing points without the need for users to repeatedly set it.

5Complete testing capabilities

The device provides a choice between online and offline testing modes, which allows for the verification of insulation monitoring devices in the system. Alternatively, the device can use the power supply provided internally to perform a more comprehensive verification of the insulation monitoring device using the simulated DC system provided internally.

Introduction to DC grounding verification and protection misoperation analysis testerAnalyze the signal amplitude, frequency, power and other parameters of the tested device through this function.

The device has a bridge safety detection function, through which users can determine whether the bridge is safe based on the ratio of the negative to ground voltage and the positive to ground voltage of the tested device.

1．Usage environment

a)Working power supply:AC220V±15%

b)Ambient temperature-20℃—45℃

c)Relative humidity:0—90%

2．Controllable DC power supply parameters

a)DC power output:0-280VConfigurable

b)Voltage output control accuracy:0.5%

c)The maximum output current is1.2A

3．AC power supply parameters

a)Output voltage level: AC110V，AC50V

4．Introduction to DC grounding verification and protection misoperation analysis testerDC voltage measurement

a)Resolution of DC voltage measurement:0.1V

b)Accuracy of direct to ground voltage measurement:

0-100V<1%

100V-280V<0.5%

c)Measurement accuracy of negative to ground voltage:

0-100V<1%

100V-280V<0.5%

d)System voltage measurement accuracy:

0-100V<1%

100V-280V<0.5%

5．Positive and negative insulation resistance parameters

a)Adjustable range of positive and negative pole pair insulation resistance:0—255kΩ

b)Positive and negative pole insulation resistance adjustment step size:1kΩ

6．Distributed capacitance parameters of branch positive and negative poles to ground

a)Adjustable range of distributed capacitance for branch positive and negative poles:0—31uF

b)Adjustment step size of distributed capacitance for branch positive and negative poles:1uF

7．System positive and negative pole to ground distributed capacitance parameters

a)Adjustable range of distributed capacitance between positive and negative poles of the system:0—110uF

b)Adjustment step size of distributed capacitance for positive and negative poles of the system:10uF

8．Test setting parameters

a)Number of selectable test point groups:1—5group

b)The testing time interval can be set within the following range:5—999S(seconds)

c)The testing time can be set within the following range:5—999S(seconds)

9. Signal comprehensive testing parameters

a)Signal amplitude:0-110V

b）Signal frequency:0.24Hz-50Hz