ZMJ100PRW Wireless Remote Transmission Density Monitor
These instruments are used to monitor SF6 gas density in sealed tanks. They are applied to indicate the gas density and to provide a signal outputs when the density reaches the set value. They are able to transmit the real-time data of SF6 gas density remotely and realize the online remote monitoring. They are suitable for monitoring high-pressure system. The SF6 gas density data can be remotely monitored and transmitted by low-power, high anti-interference wireless communication methods. They can provide multiple solutions to support new substations and the intelligent transformation of existing substations.
Drawing of ZMJ100PRW Wireless Remote Transmission Density Monitor
Application of ZMJ100PRW Wireless Remote Transmission Density Monitor
SF6 Gas Insulated Switchgear (GIS)
SF6 Insulated Circuit Breakers
SF6 Insulated Pole-Mounted Switch
SF6 Insulated Transformers
SF6 Insulated Mutual Inductor
SF6 Insulated Busbar Systems
Feature of ZMJ100PRW Wireless Remote Transmission Density Monitor
The temperature compensation device ensures higher accuracy of measurements.
Suitable for indoor or outdoor installations.
AISI 304 hermetic sealed stainless steel case
Gas connexion tubes are made of stainless steel AISI 316.
Wireless communication and convenient for the networking of sites
Strong anti-interference capability and long distance transmission
Using the concentrator as a center, these instruments can achieve autonomous wireless networking and the concentrator outputs all monitoring data through the RS485.
Up to four pairs of contacts can achieve an overpressure alarm, a dual alarm or a double lock and many other options to make monitoring more secure and reliable.
Technical Data of ZMJ100PRW Wireless Remote Transmission Density Monitor
| Nominal Size: | 100mm |
| Scale range: | -0.1 to 0.9MPa (customizable) |
| Accuracy: | (related to the measuring span SF6 in gas phase) |
| a) At 20°C: | Class 1.0 or 1.5 |
| b) -40°C to +60°C: | Class2.5 |
| 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) |
| Pressure connection: | M20×1.5 (customizable) |
| Installation method: | radial or axial |
| Electrical connection: | Compact pluggable box with M20 x 1.5 cable gland |
| cable size： | 1.5mm2 recommended, 2.5mm2 maximum |
| Insulation properties: |
|
| Insulation resistance: | >100 MW (500 V DC) |
| Withstand voltage: | 2kV, 50/60 Hz 1 min |
| Contact type: | Pointer driven magnetic snap action signal contacts |
| 80%Ag, 20% Ni, 10µm Au plated |
| Impact rating: | 50g (oil-filled), 30g (non-oil-filled) |
| Contact electrical parameters: | 30W/50VA, 1A (maximum) |
| 220VDC/380V 50/60Hz (maximum) |
| Watch glass: | Laminated safety glass |
| Weight: | 1.2kg |
| Pressure element: | European bourdon tubes |
| Bending Antenna Type for indoor, Sucker Amtenna Type for outdoor |
Main electrical performance indicators and specifications of the remote transmission part
| Power supply: | DC 24V |
| Power consumption: | < 2W |
| Communication mode: | Wireless |
| Protocol: | ModBus |
| 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) |
Options of ZMJ100PRW Wireless Remote Transmission Density Monitor
Power-frequency withstand voltage: 2.5kV 50/60 Hz 1min
Oil-filled
Measuring medium: SF6, Air, N2, SF6 + N2 and other gases
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