Features of GIS partial discharge monitoring system
- Automatic PD fault classification
- High resolution
- Selectable UHF filters and gain on a per-coupler basis
- Enhanced noise gating features for elimination of interference
- Enhances system reliability and reduces risks
- Detects faults in real-time before failure, damage, or loss of supply
- Increases safety for personnel
- Determines the condition of GIS insulation
- Implementation of efficient, condition-based maintenance strategies
- Extends residual life of the aging plant and defers capital costs
- Reduces insurance premiums
- Retrofits to most major GIS systems
Applications of PD monitoring system for GIS
The PDMG-RH system is used for continuous, online partial discharge monitoring and analysis on permanently installed applications on all makes of GIS in transmission installations and on critical systems such as in power plants and large industrial consumers. It provides digital and analog (SCADA) outputs for remote alarms and warnings as well as remote data access to all diagnostic information.
Specification of Online Partial Discharge Monitoring System for GIS
| Equipment cabinet | Input 300 channels max | |
| Local interface Central control computer w/ 17” Monitor | ||
| Remote interface GPS/ backup system | ||
| Output | Two SCADA/SCS Alarm contacts (PD alarm, system fault) | |
| Ethernet or modem communications | ||
| LED status indicators | ||
| Optical converter unit (OCU) | Power supply 110-240V 50/60 Hz | |
| Supply current 110 mA | ||
| Input 3 UHF channels | ||
| Ambient operating -25 to +55°C (-13 to +131°F) (BS EN 60068-2-1,60068-2-21)
temperature |
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| Humidity 100% condensing | ||
| UHF sensors | Mounting Internal or external | |
| Output Communicates to OCU or equipment cabinet | ||
| Bandwidth according to 500-1500 MHz NGC/TGN(T) 121 | ||
| Smart HQ software | Operating system Windows XP compatible | |
| Max monitoring locations 256 sites | ||
| Memory 512 MB | ||
| Min size for installation 5 MB (excludes database) | ||
| System alarms System fault, channel fault | ||
| PD alarms Gradient, PD trend | ||
| PD trend indicators Criticality rate of change | ||
| Bi-weekly system Email, SMS (text message) status notification | ||
| Compliance EMC compliance Tested to Industrial Generic Immunity and Industrial
Emission standards |
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