Products - Hybrid gas insulated switchgear 110 kV up to 3150 A rated current
On the basis of long research of the world’s experience of using gas insulated switchgears for voltage rating 110 kV we developed the product matching the following concepts:
- Design simplicity, minimum overall dimensions
- Easy to project
- Easy for installation
- Safety, serviceable and easy to install
- Possibility to integrate in the overall substation control system
- Line maintenance and warranty service
HGIS IS&T 110 kV takes advantages from the two different technologies as conventional air insulated switchgear and the newer SF6 gas insulated switchgear. With such design, all the accessories are localized in separate SF6 tanks:
- Bushing insulators
- Earthing switches
- Circuit breaker
- Cable connectors
- Voltage transformers
Minimal installation losses appears because of high prefabrication level. Installation works don’t need high-qualified staff. Transportation doesn’t need special vehicles.
Useful decrease of needed space against conventional air insulated switchgear caused by the module type design and minimal overall dimensions because of SF6 insulation.
Module type design makes it easy to perform project works, decrease mistakes frequency, in other words, makes the project “predictable” against conventional equipment projects
SF6 insulation needs less maintenance losses. For example, main moving knives of usual air insulated disconnetor needs every year maintenance, against SF6 insulated disconnector doesn’t need maintenance during the whole life period.
High dielectric rigidity of SF6 cause high insulation level at low sizes and distances between phases and phase-to-earth, good arc blowout and cooling properties increase breaking capacity of the circuit breakers, decrease heating of the busbars.
Maintenance safety caused by using of grounded tanks, made of aluminum alloy with covering. The tanks are equipped by all sensors (pressure, temperature etc), all needed inspection windows to provide the visible interruptions.
Main technical parameters
Typical units design
Single bus line bay
Double bus line bay