HM100PR Density Monitors
HM100PR Density Monitors are used to monitor SF6 gas density in sealed tanks. They are applied to provide alarm signal outputs when the density reaches preset values. Furthermore, it can transmit the real-time SF6 gas density data remotely, to achieve online remote monitoring function.. They are specifically designed for over 500kV EHV grade application field, adapting multi-level protection and full range of shielding measures to ensure the reliable operation of the products.
Application of HM100PR Density Monitors
SF6 Gas Insulated Switchgear (GIS)
SF6 Insulated Circuit Breakers
SF6 Insulated Pole-Mounted Switch
SF6 Insulated Transformers
SF6 Insulated Current Transformers or Voltage TransformersSF6 Insulated Busbar Systems
Features of HM100PR Density Monitors
They adopt highly reliable protection circuit design, multi-level isolation and filtering technology, thus effectively inhibiting the intrusion of conductive interference.
They adopt the full-body shield design, stainless steel shielding shell, shielding junction box and shielding window glass, thus ensuring the ability of anti-electromagnetic radiation interference.
They are able to adopt the optic fiber communication backstage, thus avoiding data transmission losses from electromagnetic interference.
The use of high-precision SF6 density algorithm ensures that the background monitoring data coincides with those field instructions.
They are compatible with ordinary SF6 remote products. They do not need other modifications in strong interference occasions.
The temperature compensation device ensures higher measurement accuracy.
Suitable for indoor or outdoor installation
Up to 4(four) sets of switch contacts toachieve over-pressure alarm, dual alarm or double locking and many other solutions, ensuring the monitoring more secure and reliable.
Technical Data of HM100PR Density Monitors
| Case diameter: | 100mm |
| Scale range: | -0.1 to 0.9MPa (customizable) |
| Accuracy: | ±1.0%FS（+20±1℃），±1.8%FS（-20℃～+60℃）（gas phase） |
| Degree of protection: | IP65 |
| Ambient conditions: | -20°C～+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: | Plug-in connection M20 × 1.5 sealing head |
| cable size: | 1.5mm2 recommended, upper limit 2.5mm2 |
| Contact insulation performance: | Insulation resistance: >100 MW (DC 500 V) Withstand voltage: 2kV, 50/60 Hz 1 min |
| Contact type: | Magnetic snap-action contact 80%Ag, 20%Ni, 10µm Gold plated |
| Impact rating: | 50g (oil-filled), 30g (non-oil-filled) |
| Contact electrical parameters: | 30W/50VA, 1A (upper limit) |
| 220VDC/380V 50/60Hz (upper limit) |
| Watch glass: | Laminated safety glass |
| Weight: | ≈1.2kg |
| Pressure element: | Bourdon tube |
Technical Parameters for Remote Module
IEC61000-4-2： level 4 /A (8KV/15kV)
IEC61000-4-3： level 4/A (30V/m)
IEC61000-4-4： level 4/A (4KV)
IEC61000-4-5： level 4/A (+/-2kV)
IEC61000-4-6： level 3/A (10V)
IEC61000-4-8： level 5/A (100A/m)
IEC61000-4-9： level 5/A (1000A/m)
IEC61000-4-10：level 5/A (100A/m)
IEC61000-4-12：level 4/A (4KV)
IEC61000-4-17：level 3/A (10%UN)
IEC61000-4-29：0.1s/A (40%UT/70%UT)
Options of HM100PR Density Monitors
Oil-filled
Measuring medium: SF6, Air, N2, SF6 + N2 and other gases
Wide temperature range ：Optional-40℃～+60℃or -60°C～+60°C
Optional measurement accuracy：±1.6%FS（+20±1℃），±2.4%FS（-20℃～+60℃）（gas phase）
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