YL-AIM AC intrusion DC detection device-Global supplier

No. 1155 Caotan 10th Road, Weiyang District, Xi'an City, Shaanxi Province, China (Zhichao Innovation Space)

▍ brief↴

In the power systemDC SystemGrounding fault is a type of fault that is prone to occur and poses a significant threat to the power system. Whether it is positive or negative grounding, it may cause protection misoperation or protection refusal, endangering the normal operation of the power system.

The "DL/T 856-2004 DC Power Supply Monitoring Device" specifies the setting values for different DC system grounding faults. When the grounding impedance of the DC system is lower than this resistance value, it indicates that the system is in a fault operation state and needs to be dealt with in a timely manner.

The AC surge fault in the DC system is a serious grounding situation in the DC system. When an AC surge fault occurs in the DC system, it is highly likely to cause protection misoperation and pose great harm.

According to the safety measures for the new DC system, when an AC surge fault occurs in the DC system, the DC insulation monitoring device must promptly issue an alarm signal and record the time of the fault occurrence. And the existingDC system insulation monitoring deviceNo effective solution has been provided for AC surge faults, resulting in maintenance personnel being unable to handle AC surge faults in a timely manner, endangering the safety of the DC system. Therefore, Shaanxi Yilian Electric has developedAC intrusion into DC detection deviceThis module can add feature analysis of AC surge faults in DC systems, extract and display effective value components of AC and DC in DC systems, and implement measurement, recording, and alarm functions for AC surge into DC systems without changing the insulation monitoring device of the original DC system. Once an AC surge accident occurs, immediately inform maintenance personnel of the magnitude of the AC surge voltage, providing a quick and effective solution for DC system AC surge faults.

▍ PRODUCT FUNCTION↴

★Real time monitoring function of AC/DC voltage:AC intrusion into DC detection deviceReal time monitoring of system bus to ground voltage, including system voltage, positive to ground voltage, negative to ground voltage, AC surge voltage, and new alarm information, and real-time display;
★Parameter setting functionThe device can set various alarm threshold values through the touch screen, including system overvoltage alarm limit, system undervoltage alarm limit, and AC surge voltage alarm threshold; You can also set: system voltage level, protocol type, device address, baud rate;
★Historical data storage and viewing functionWhen the ground voltage or AC surge voltage of the positive and negative busbars in the DC system exceeds the alarm threshold value, the alarm voltage and alarm time will be saved and can be viewed at any time;
★AC voltage waveform display functionThe device displays the AC voltage entering the monitoring system bus in waveform form;
★Point output alarm signal;
★Data upload function：AC intrusion into DC detection deviceReal time monitoring data and historical alarm record data can be uploaded to the upper computer system through RS232 or RS485 interfaces.

▍ Product Features↴

★High performance hardwareThe entire system is designed and produced using industrial grade chips and components. The device is a high-speed 32-bit industrial control CPU, and independent high-precision 16 bit AD converters are used for AC and DC voltage sampling. The conversion speed is over 1000 times per second, and the resolution is over 1/50000.
★human interfaceThe device adopts a 5-inch industrial grade color touch screen design, with a user-friendly interface design. The system can flexibly select pages through the touch screen. The functions are clear at a glance, convenient and fast.
★Dynamic storage of historical dataThe device adopts dynamic data storage technology, which stores the measured system voltage, positive and negative bus to ground voltage, or AC voltage when an alarm occurs, making it convenient to view the changing patterns of faults.
★High securityAll sampling units adopt isolation design, and equipment failure does not affect the normal operation of the DC system.
★high reliabilityThe dual anti-interference design of software traps and monitoring chips ensures long-term stable operation in strong electrical interference environments.

▍ TECHNICAL INDEX↴

Test project	range	resolution	accuracy
DC Voltage	0-300V	0.1V	≤0.5%
AC voltage	0-300V	0.1V	≤1%

★Usage environment：
Environmental temperature: -20 ℃ to+50 ℃
Relative humidity: ≤ 95%
Working power supply: AC/DC compatible, working voltage range 85-265V

★shape parameter：
Weight: 1kg

Dimensions: Length 210mm x Width 160mm x Thickness 132mm

Panel size: length 210mm x width 160mm

Installation hole size: 192mm in length and 137mm in width