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LHJYJC DC Insulation Intelligent Monitoring System
Category: Product Center
Key words: equipment
Product Description
1. Product introduction
LHJYJC type DC insulation intelligent detection system, using non-contact intelligent magnetic modulation DC micro-current sensor, by detecting the DC system positive and negative bus grounding leakage current and the voltage of the bus to the ground, using a unique algorithm to measure the two ends of the bus at the same time to the ground resistance, so as to distinguish the grounding fault of the bus. This technology does not need to superimpose any signal on the bus, will not have any adverse effects on the DC system power supply, completely eradicate the bus double-end insulation drop, as well as the bus to ground distribution capacitance caused by misjudgment and leakage, and at the same time greatly improve the accuracy and speed of detection; it is an ideal equipment for detecting insulation resistance.
2. System functions and characteristics
◆ Combination of real-time monitoring and branch inspection to ensure real-time monitoring
◆ High measurement accuracy: bus-to-ground voltage is better than 0.2%, bus and branch-to-ground resistance is better than 5%
◆ Large detection range: maximum detectable 100 K resistance
◆ Fast response time: bus 5s alarm, branch less than or equal to 1S per branch; (Note: when there is no influence of distributed capacitance)
◆ RS485 serial port communicates with monitoring host computer. Customizable PC communication protocol to facilitate other manufacturers to monitor access
◆ Through monitoring, alarm limit can be set to adapt to the climatic conditions of different regions; It can monitor the equivalent decline of positive and negative bus insulation
◆ The injection of low-frequency AC signals is canceled, and branch detection is not affected by bus-to-ground capacitance; The innovative design scheme of the vulnerable circuit of the isolated intelligent leakage current sensor is continuously replaced by electricity, which effectively solves the problem that the DC sensor is damaged and cannot be replaced by electricity.
◆ E M S performance meets IEC61000-6-2 industrial environmental immunity standards; The product meets the EU ROHS lead-free standard and has passed CE certification.
3. Technical indicators
a. Power supply mode: AC220V
B. Power consumption of the whole machine: ≦ 20W
C. communication mode: RS485/odd check/9600BPS/8-bit data bit/1-bit stop bit
D. voltage measurement range: 0-1000V
E. resistance measurement range and accuracy: 0-50KΩ,± 5%;50-100KΩ,± 10%
F. insulation resistance alarm value: 5-70KΩ adjustable
G. bus alarm time: 5S (default) branch alarm time: 64S (default)
H. automatic switching resistance time: 24H (default)
I. size (L×W×H):260*120*35MM
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| Product Schematic Diagram | General Schematic |
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