our product offerings for Switchgear/GIS condition Monitoring

The continuing growth in global population and economy in India  is leading to the rising requirement of electrical power and diminishing availability of space (land). For this purpose, the substation equipment have to be made more efficient and reliable to cope up with increase in demand – specially adapting current power distribution and transmission system – and space saving design may help enhancement of utility power distribution system in this scenario – which may be fulfilled by GIS. The phenomenon is quite simple, a gas Insulated substation is an electric power station, in which all live equipment and bus-bars are housed in grounded metal – that is sealed and placed in a chamber filled with SF6 gas. A large space is required for the sub-station with normal Air Insulation Switchgears (AISs), because the required phase-to-phase and phase-to-ground clearances are very large. But as the dielectric strength of SF6 gas is higher than the air, which is necessary for phase-to-phase and phase-to-ground clearances, the required spaces are much lower for all equipment. Therefore, the overall size of each bay – and consequently the whole substation is reduced to about 10% of the conventional air insulation substation. The compactness of Gas Insulated Switchgears (GIS) has a direct influence on land requirement, and land cost. Compact modular designs offer many possibilities in layout design, & allow tailor made applications.

Utilizing advanced UHF technology, the PDMG-RH system, a member of the highly successful PDMG-R family, is designed for GIS installations. It collects PD data from UHF sensors (couplers) installed on the GIS and transmits the information to software for automatic interpretation and analysis by Expert Software, allowing incipient faults to be avoided and the condition of the long term health of the insulation system to be simply and effectively monitored over the life of the GIS.

Features:-

• 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 condition of GIS insulation
• Implementation of efficient, condition-based maintenance strategies
• Extends residual life of aging plant and defers capital costs
• Reduces insurance premiums
• Retrofits to most major GIS systems

Applications:-

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 alarm and warning as well as remote data access to all diagnostic information.