GIS BushingsNekuNiru Company is the supplier of the GIS bushings in Composite and ceramic housing from the known LAPP company. These bushings are filled with high quality Hexafluoride sulfur gas (GIS) and are routine tested (mechanical, electrical (PD) and SF6 tightness) and certified respectively. We can divide LAPP GIS bushings into 4 groups: Eco-HQ Series (Economic High Quality), G Series (GIS), S Series (Switch gear) and W Series (Wall).
1. Eco-HQ series
Economic, high-quality GIS and circuit breaker bushings
Voltage Range: 72.5 - 170 kV for sub-transmission applications
Creepage distance: 25-55 mm / kV
Estimated inflation pressure: 520 kPa
2. G Series
Outdoor Bushings for transmission applications
Voltage range: 245 – 800 kV
Creepage distance: 25 - 55 mm/kV
Rated filling pressure: 520 kPa.
3. S Series
Optimized and compact designed Switchgear (S) / Gas Circuit Breaker Bushings
Volatge range: 420 and 550 kV
Creepage distance: 25-55 mm/kV
Rated filling pressure: 680 kPa.
4. W Series
Indoor and outdoor gas insulated
Designed in composite in order to minimize the explosion risk
Voltage Range: 72.5 – 800 kV
Dry-type RIP Insulation
Moser Glaser researched a way to increase the dielectric characteristics of its High Voltage equipment.
As a result Moser Glaser invented the Epoxy Resin Impregnated Paper (RIP) technology in 1958. With more than 50 years of experience in development of the ERIP technology, Moser Glaser offers transformer bushings DURESCA® DTOI from 36 to 300kV. The insulation lays directly on the conductor or tube and consists of crepe paper dried under vacuum and impregnated with epoxy resin. Conductive grading layers are embedded during the winding of the insulation for the best field control. This guarantees the highest operational and human safety. A strong moisture barrier prevents any contamination or moisture ingress. Moser Glaser design does not use any oil; DTOI are completely dry and free of partial discharge.
DTOI bushings can be applied at any position from 0° to 90° from vertical and allow for safe horizontal transport and storage.
Moser Glaser pioneered the standardization of Silicone Rubber Insulators on Bushings, bringing a high level in safety and reliability to the Electric Utility industry and increasing the performance of the bushing in heavily polluted environments. Weight reduced as well as flexible sheds, increase its tolerance to vandalism, or earthquakes. No risk of porcelain break during shipping or handling; no collateral damage.
Moser Glaser can interchange a wide variety of bushings designs. This allows the customer to replace existing OIP bushings with the RIP technology. The supply chain is simplified as the silicone molding operation is done in-house, Moser Glaser can offer short lead-times for its standard range of product. In addition to the standard range, our design, combined with our production process, allows a wide flexibility and adaptability to provide tailor-made solutions.
All Bushings are equipped with a 2kV test tap. Used to test the capacitance C, partial discharge pC and the dissipation factor tan delta.
Arcing Horns made of CrNi Steel
Arcing horns are used to protect the bushing from damage in case of flashover. L distance can be adapted to customer needs.
On customer requirement, the Fix-conductor version can be equipped with an external shield.
Moser Glaser, pioneer in the RIP insulation has always been focused on the development of the dry type insulation. After more than 60 years of applying RIP insulation on our products, time was coming to reach the next level of insulating material. Moser Glaser launched an extensive research and development program in the early 2000‘s to determine how to improve the materials and performance using the long experience in the company. The main performance and life expectancy restraint in RIP condenser bushings was found to be the paper itself. Paper is an organic material with inconsistent material parameters, namely the moisture content. Too much moisture will cause high loss values, degrade the insulation system of the bushing, and possibly cause a premature failure. In order to compensate this, modern RIP bushings utilize drying systems during the manufacturing process. For shipment and storage, plastic bags with a desiccate bag or oil containers are used to protect the bushing. Finding an alternative material to paper was not an easy task, though, due to the fact that paper provides good insulation characteristics and has been used in bushing and transformer manufacturing processes for many years with continual optimization. Several experimentations were needed to find optimal successor. Moser Glaser undertook this task by performing tests on many materials in order to find a successor to the paper. After research, Moser Glaser found a special polyester structural material which is an excellent alternative to paper. Moser Glaser performed a sequence of tests to qualify this solution.
Routine and type tests according to IEC 60137-2008. Specifications for the type tests were beyond the requirements of the standard. In addition several special tests have been developed to challenge this solution.
• Adhesion test of direct molded silicone on the RIS insulation
• Special humidity test
• Dynamic cantilever load tests
• Temperature cycle test
• Accelerated ageing test under high voltage
The new Resin Impregnated Synthetic RIS is now developed and part of Moser Glaser products portfolio.
An all-inclusive solution. the result of this project is an ideal association of existing epoxy resin technology and its appreciated characteristics
• Partial discharge free
• Installation at any angle
• Self-extinguish material (no risk of fire)
• enhanced with new features:
• Shorter production cycle
• Easier handling for long transportation and storage
• Reduced power factor and capacitance
• Not affected by humidity
For outdoor application Moser Glaser standardized a direct-molded silicone insulator to provide an ultimate safer solution. Moser Glaser could maintain its strength by providing a high level of customization.
Therefore RIS technology can be applied to the standard range and also can interchange all existing designs. There are no limitation as for the diameter and length. What you get today with RIP technology can be offered with RIS. With this important new milestone, Moser Glaser is now ready to offer the bushing of the future.