RDH Density Micro-Water Humidity Device
These instruments are used to monitor micro-water content, density, pressure and temperature of SF6 gas in sealed tanks, able to achieve real-time remote monitoring. Smart compensation technology is applied for real-time tracking of non-linear gas pressure changes and micro-water changes in SF6 gas, ensuring accurate measurement and wide range of applications. It is suitable for monitoring the high voltage system. The integrated design and effectively ensure the air tightness. It can provide multiple solutions to support new substations and the intelligent transformation of existing substations.
Drawing of RDH Density Micro-Water Humidity Device
Application of ZMJ100XD Series Density Monitors
SF6Gas Insulated Switchgear (GIS)
SF6 insulated circuit breakers
SF6 insulated pole-mounted switch
SF6 insulated transformer
SF6 insulated mutual inductor
Features of ZMJ100XD Series Density Monitors
Integrated collector design, which can guarantee air tightness effectively.
Only one unit takes up the collector, minimising the chance of leakage.
The remote density monitor and dew point sensor are integrated in order to achieve on-site collection and processing and to report simultaneously the details on the density, pressure , temperature and micro-water material.
Digital signal output, RS485 backend server communications, enabling on-site networking and commissioning.
Technical Data of ZMJ100XD Series Density Monitors
Scale range: Pressure: | 0 to 1MPa abs |
| Dew point: | -50°CDP to 60°CDP |
| Accuracy: | (related to the measuring span; SF6 in gas phase) |
| a) At 20°C: | Class 1.0 |
| b) -40°C to +60°C: | Class 2.5 |
| Dew point: | ±3°CDP |
| Degree of protection: | IP65 |
| Ambient conditions: | -40°C to +60°C, relative humidity ≤ 95%RH |
| Leakage rate: | ≤1 × 10-9 Pa·m3/s (Helium leakage inspection) |
| Interface size: | M20 × 1.5, (customizable) |
| Installation method: | radial or axial |
| Pressure interface: | flange interface |
| Weight: | 2.5kg |
Main electrical performance indicators and specifications of the remote transmission part
Power supply: | DC 24V |
Power consumption: | < 2W |
Communication mode: | RS485 |
Protocol: | ModBus RTU |
| Baud rate: | 9600bps |
Anti-electromagnetic interference
IEC61000-4-2: | level 4 (15kV) |
IEC61000-4-3: | level 3 (10V / m) |
IEC61000-4-4: | level 4 (4kV) |
IEC61000-4-5: | level 3 (+/- 2kV) |
IEC61000-4-6: | level 3 (10V) |
IEC61000-4-8: | level 5 (100A / m) |
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