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Qingdao Huaneng Yuanjian Electric Co., Ltd
DC grounding inspection and protection misoperation analysis tester
NegotiableUpdate on 05/19
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Overview
Introduction to the main functions of the DC grounding inspection and protection misoperation analysis tester $r $n1. It can calibrate insulation monitoring devices or portable grounding search instruments online or offline; The device has a positive grounding test function, which can test the accuracy of the positive grounding test and the accuracy of the positive grounding alarm for the tested device; The device has a negative grounding test function, which can test the accuracy of the negative grounding test and the negative grounding alarm accuracy of the tested device; The $r $n device has a two pole grounding test function, which can detect the two pole grounding function of the tested device. The two pole grounding impedance provides five preset values, and users can set their own combinations;
Product Details
HN7127DC grounding inspection and protection misoperation analysis testerMain Function Introduction
1．The device has a voltage accuracy testing function and is equipped with an adjustable DC voltage system inside. Users can set multiple voltage testing points to test the voltage measurement accuracy of the tested device;
2．The device has a voltage limit alarm test function. Users can detect the voltage limit alarm function of the tested device by setting and changing the output voltage of the adjustable DC voltage system inside the device; (This feature was tested in offline mode)
3．The device has an AC grounding test function, which can verify the AC grounding detection function of the tested device; (This feature was tested in offline mode)
The device has a balanced bridge detection function, through which users can detect the positive ground insulation resistance, negative ground insulation resistance, and balanced bridge size of the tested device or DC system
DC grounding verification and protection misoperation analysis tester Main technical indicators
1．
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．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．DC 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
DC grounding verification and protection misoperation analysis tester Display and touch screen parameters
a)Display screen size:7inchTFT
b)Display screen resolution:65536Color,800X480
c)Touch screen resolution:4096point
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