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Integrated on-line monitoring device for casing
Category: Product Center
Key words: equipment
Product Description
System Introduction
Bushing integrated on-line monitoring device is a real-time monitoring of transformer high-voltage bushing insulation performance, oil state, partial discharge, internal and external temperature parameters, a comprehensive sense of the state of high-voltage bushing, to ensure the safety of the substation system. The whole system consists of intelligent end screen sensor, oil level sensor, oil temperature and oil pressure sensor, single hydrogen sensor, bus voltage acquisition device, casing integrated on-line monitoring device and supporting upper computer software.
Functional features
The integrated end screen sensor is installed at the end of the screen, real-time monitoring of the insulation status of the pressure tube, media loss factor, capacitance, leakage current and casing partial discharge characteristics, local discharge, discharge times, etc;
◎ Install a hydrogen-oil temperature-oil pressure three-quantity fusion sensor at the oil intake of the high-pressure casing to monitor the oil state parameters, oil pressure, oil temperature and oil level of the pressure casing in real time;
Real-time monitoring of H4 content, H2 content, H2 change rate;
◎ The use of integrated end-screen sensor to achieve synchronous acquisition of dielectric loss and PD signals, easy to install;
The system medium loss factor measurement error is high, the medium loss measurement error "not more than (standard reading x 1% plus 0.001)", the relative standard deviation "less than 0.3";
◎ The system has strong anti-interference ability, high measurement accuracy and good stability under strong magnetic field and different load changes;
◎ The integrated end screen sensor does not change the original grounding mode of the end screen of the casing, and the grounding wire does not need to be led down to ensure reliable grounding of the end screen nearby;
◎ The special alloy metal shell of the integrated end screen sensor has good anti-electromagnetic interference performance;
◎ The protection level of the integrated end screen sensor reaches IP68, ensuring good sealing of the end screen and good weather resistance;
◎ Support a variety of communication methods, support RS485,GPRS wireless and other communication methods;
◎ The system hardware adopts modular design, which is convenient for maintenance, debugging and production.
Technical parameters
| ItemObjective |
RefersStandard |
| Working power supply |
AC220V±15%，50Hz |
| Power consumption |
≤ 25W |
| Operating temperature range |
-40 ℃ ~ 80 ℃ |
| Acquisition cycle |
30 seconds |
| Monitoring parameters |
Leakage current, bus voltage, dielectric loss factor, capacitance, casing oil temperature, casing oil pressure, casing hydrogen content, etc. |
| Alarm parameters |
Media loss factor, capacitance, oil temperature, hydrogen content in oil, oil pressure, local discharge, etc. |
| Communication mode |
RS485, Wireless, 61850 |
| Protection level |
IP 66 |
| Partial Discharge Monitoring Frequency Band |
300 kHz~50 MHz |
| Minimum detectable local quantity |
<5pC |
| dielectric loss factor measurement error |
≤± (standard reading × 1 .001) |
| Dielectric loss measurement range |
≤0.1%~30% |
| Equivalent capacity and accuracy |
100PF~0.05uF; ±(Standard readingNumber＊1PF） |
| Bus voltage |
35kV-1000kV；≤± 0.2% reading |
| System frequency |
45~65Hz； ±0.01Hz |
| End screen leakage current measurement range |
3mA~1000 mA |
| Measurement accuracy of leakage current at the end of the screen |
± (standard reading * 1.1mA) |
| Measuring oil temperature |
-40 ℃ ~ 120 ℃, ±1℃ |
| Measured by pressure |
10kPa~400KPa, 0.5%FS (full temperature zone) |
| Hydrogen (solid palladium alloy hydrogen sensor) |
0~5000ppm |
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