Gas-insulated Instrument Transformers
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INSTRUMENT TRANSFORMERS TRENCH GERMANY GMBH

INSTRUMENT TRANSFORMERS TRENCH GERMANY - the former founded in 1946 - is a recognized world-wide leader in the design and manufacture of high voltage equipment for electrical and industrial systems. In its long history - while experiencing all common insulation mediums, e.g. epoxy resin, traditional oil-paper-in- sulation - TRENCH GERMANY added was the first supplier of gas-insulated voltage transformers for GlS-switch- Due to the excellent experience with TRENCH GERMANY also started applying this new technology and the transformers for outdoor installations. completely abandon the conven-...

The TRENCH design of SF6-insulated instrument transformers for outdoor installation combines the specific characteristics of the insulation medium SF6 and the composite insulator. Internal Insulation Medium: SF, permanently constant quality according to IEC 60376 insulation with "self-healing effect" meaning "no im- pairment of the insulation through partial discharges" non-organic material with no aging of the insulation system, long lifetime and minimum risk of failures re-usable and therefore replacement of insulating ma- terial or active parts is always possible closed pressure system...

SF6 Instrument Transformers have ...to withstand the most aggressive natural or industrial pollutants ...to operate in all extreme climatic ...to provide an excellent seismic withstand capability ...to be the first choice for sensitive sites e.g. areas with water protection restrictions ...to give you best Economical Advantages ...to save space, foundation support structures, etc. by using combined current and voltage ...to easily change or add cores or windings even after years of service (e.g. additional me- tering cores) ...to provide highest accuracy (e. g. IEEE

...to provide Safety for Personnel and Operation ...to totally protect against any explosion or fire caused by internal flashover or any other failure ...to be the safest kind of high voltage in- strument transformer even for installations ...to be fully controlled by monitoring ...to guarantee best reliability by using the non-aging insulation medium SF6-gas ..to match your Special Requirements ...to avoid ferroresonance in sensitive networks ...to work on highest voltage levels (800kV) ...to use customer designed insulators with a large variety of numbers and shapes of the silicone sheds...

Voltage Transformers • identical principle design from • optimised high voltage coil assures identical electric stresses under both transient and steady state conditions • essentially unaffected by external stray magnetic fields • wide ferroresonance-free design without the use of an external damping • small power transformer designs Current Transformers • identical principle design from • uniformly distributed secondary windings guarantee accurate transformation at both rated and high currents • low reactance bar type primary conductor provides optimal short-circuit • multiple-turn...

Combined Transformers Type SVAS identical principle design from the single-section high voltage coil (not cascaded) of the voltage trans- former section enables designs at highest voltage levels head type design with voltage transformer section located on the combines all features of the single provides the advantages of a current and inductive voltage transformer benefits in handling, installation and maintenance cost less foundation space required All types of Current, Voltage and Combined Trans- formers are available for all insulation levels and meet the metering and protection classes...

Trench Austria GmbH Trench Brasil Ltda Contagem, Minas Gérais Trench China/ MWB (Shanghai) Co. 3658 Jiang Cheng Road Trench Fushun Dong Er Dao, Shuncheng District Fushun, Liaoning Province Peoples Republic of China 113126 Trench Limited Bushing Division Ajax, Ontario Trench Limited Coil Product Division Scarborough, Ontario Trench Limited nstrument Transformer Division Scarborough, Ontario Trench Germany GmbH South Drive Tyne & Wear