DDM60R Digital Density Monitor
DDM60R Digital Density Monitor are used to monitor the density of SF6 gas in sealed tanks. It has real-time remote transmission of SF6 gas density change data, realizes online remote monitoring function, and can display the gas density digitally on site. When the density value reaches the set value, the contact output alarm signal. Suitable for medium voltage system monitoring. It can be used in the new substation building and the renovation and upgrading of existing substation.
Drawing of DDM60R Digital Density Monitor
Application of DDM60R Digital Density Monitor
SF6 Gas Insulated Swithchgear (GIS)
SF6 Insulated Circuit Breaker
SF6 Insulated Pole-Mounted Switch
SF6 Insulated Transformer
SF6 Insulation Current Transformer or Voltage Transformer
SF6 Insulated Bus System
Feature of DDM60R Digital Density Monitor
Local digital display and control
The microswitch is used as the signal output device to realize the free switching between normally open and normally closed points
Temperature Compensated.
The alarm value can be set on site and can be applied to cabinets with different alarm values
Small size, installation interface can be customized, convenient and reliable
RS485 bus interface, easy to do the system expansion, and to achieve telemetry, remote control functions. Strong EMC capability
Technical Data of DDM60R Digital Density Monitor
| Scale range: | -0.1 ~ 0.9MPa |
| Pressure： | ±0.5%FS |
| Temperature： | ±1℃ |
| Pressure at 20℃： | ±1.0%FS |
| Ambient conditions: | -40℃ ~ +70℃, relative humidity： ≤95%RH |
| Degree of protection: | IP65 |
| Leakage rate: | ≤1 x 10-9Pa·m3/s (Helium leakage inspection) |
| Process connection: | M20 x 1.5 (customizable) |
| Installation method: | Radial or Axial |
| Electrical connection: | Preset cable |
| Insulation resistance: | >100MΩ (DC500V) |
| Power frequency withstand voltage: | 2kV, 50/60Hz, 1min |
| Contact type: | Magnetic holding electronic relay |
| Impact rating: | 30 g |
| Maximum switching voltage： | 380VAC/240VDC |
| Maximum switching current： | 5A |
| Watch glass: | Laminated safety glass |
| Weight: | 0.3kg |
Main electrical performance indicators and specifications of the remote transmission part
Operating voltage: 10~30VDC
Power consumption :<1W(max. 1.5W)
Communication mode :RS485
Communication protocol: Modbus RTU
Baud Rate : 9600bps
EMC Class:
IEC61000-4-2: Level 4
IEC61000-4-3: Level 3
IEC61000-4-4: Level 4
IEC61000-4-5: Level 4
IEC61000-4-6: Level 3
IEC61000-4-8: Level 5
IEC61000-4-9: Level 5
IEC61000-4-10: Level 5
Options of DDM60R Digital Density Monitor
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