Outdoor (transformer outdoor bushing)
Cable junction box-oil (transformer oil bushing)
SF6 switchgears (transformer gas bushing)
All bushings have a condenser grading and are availble with differenct insulations of the active part:
RIP – Resin Impregnated Paper
RIS – Resin Impregnated Synthetics
RIG – Resin Impregnated Fiberglas
Already in 1960 HSP started the serial production of
RIP bushings and has proven the technical benefits of this technology since more than 50 years.
Trench and HSP dry type bushings are known all around the world for their reliable product design and quality.
To support the market trend to RIP and RIS bushings, HSP and Trench have largely extended their production capacities in the recent years and reworked their internal processes. The target is to ensure a high delivery performance with very competitve lead times. This makes the Trench & HSP Group a preferred partner for Transformer OEMs, Transformer service providers and of course end customers worldwide.
IP TRANSFORMER BUSHINGS
RIP transformer bushings are oil-free transformer bushings with a solid active part made of resin-impregnated paper and a condenser control. The air side housing is available in a porcelain version or as a silicone composite material. This bushing with dry filling is designed for rated voltages of up to 1200 kV and rated currents up to 6000 A.
RIS TRANSFORMER BUSHINGS
RIS transformer bushings from HSP are oil-free and at the same time paper-free transformer bushing with a solid active part made of resin-impregnated synthetic and a condenser control. The air side housing is a silicone composite insulator. This bushing with dry filling is designed for rated voltages of 24 to 245 kV and rated currents up to 2000 A.
A particular advantage is higher resistance against humidity. Among other things this allows easier storage.
For more information please visit the HSP Homepage.
RIG TRANSFORMER BUSHINGS
Typical applications for High Current RIG transformer bushings are step-up transformers (GSU).
Trench High Current bushings CFPT are available from 24 kV to 36 kV with a current rating up to 31.500 A according to IEC 60137.
The performing technology of Resin Impregnated Fiberglas provides high temperature withstand (Class F insulation 155 °C). There is no current limitation when the bushing is operated under temperature up to 70 °C in a bus-duct and transformer oil temperature of 90 °C.
The design of the High Current bushing facilitates the interchangeability with the existing units. They are available with porcelain or composite insulator on air side with the same dimensions.
Grading Rings in Gas Circuit Breakers(GCB)
800 kV Gas Circuit Breaker
Circuit breakers are vital equipment for protecting transmission systems. They cut off current instantly in the event of a system failure due to lightning or other issues.
Gas Circuit Breakers (GCB) that work with high currents, with voltages from 110 kV to 550 kV, and accurately support increases in breaking capacity.
550 kV Gas Circuit Breaker
With high voltage and high current distribution systems, a Gas Circuit Breaker (GCB) that uses SF6 gas, with three times the insulating ability of air, is applied.
This technology releases a circuit of electrodes within compressed gas, extinguishes the generated arc by blowing a stream of supersonic air, and interrupts the current.
Aluminum corona Shields for Gas-Insulated Switchgear(GIS)
1,100 kV Gas Insulated Switchgear
(UHV pilot transmission system,1,100 kV GIS (double-break)
These are installed at switching stations and substations at relay points for sending electricity produced at power plants to UHV (ultra-high voltage) from 110 kV up to 1,000 kV.consumers (such as homes and factories).
550 kV Gas Insulated Switchgear
The switchgear is composed of isolators that open/close and cut off circuits of current, disconnectors that electrically isolate circuits and open voltage, and other components.
Gas Insulated Switchgear (GIS) is the name for a unit that houses these components and circuits in a single gas tank with a compact footprint.
Grounding devices that prevent electrical shock and lightning arresters that prevent dielectric breakdowns from lightning strikes are also included to enhance safety.
245 kV Gas Insulated Switchgear
Switchgear plays a vital role, acting as a huge switch to operate and protect substations.compact, reliable Gas Insulated Switchgear (GIS) with technology that can isolate 500 kV at a single point.