TRENCH®: A specialized manufacturer of high voltage The company is well represented electrical equipment dedicated to serving the electrical throughout the world with four industry world-wide through engineering, service and manufacturing plants in North America, six manufacturing plants in Europe, two in Asia and one in There are many reasons why power companies, research South America. A worldwide institutes and electrical engineering companies in many sales network ensures efficient nations rely on the superior technologies of Trench®. knowledgeable communications Our product line is based...

Trench® Austria GmbH Trench® Brasil Ltda Trench® Canada - Ajax Trench® Canada - Scarborough Trench® China - Shanghai Trench® China - Shenyang Trench® France S.A. Trench® Germany GmbH Trench® Italia Trench® Switzerland AG Trench® (UK) Limited

Air Core - Dry Type Reactors For more than 40 years, Trench® has supplied air core dry type reactors to the electric power industry. Versatility, Shunt Reactors confirmed capability and compliance with the most stringent Shunt reactors compensate for capacitive VARs generated quality standards ensure that Trench maintains a world- by lightly loaded transmission lines or underground cables. wide leadership position for these products. They are normally connected to the transformer tertiary winding but can also be directly connected on systems up to 138 kV. Shunt reactors are extensively used in...

Capacitor Reactors Duplex Reactors Capacitor reactors are designed to be installed in series Duplex reactors are current limiting reactors which consist of with a shunt connected capacitor bank to limit inrush two half coils, wound in opposition. These reactors provide a currents due to switching, to limit outrush currents due to desirable low reactance under normal conditions and a high close-in faults and to control the resonant frequency of the reactance under fault conditions. system due to the addition of the capacitor banks. These reactors can be installed on systems rated up to 800 kV,...

Air Core - Dry Type Reactors Test Reactors Load Flow Control Reactors Test reactors are used in high voltage and high power test Load flow control reactors change the line impedance laboratories. Typical applications include current limiting, characteristics such that flow can be controlled, thus synthetic testing of circuit breakers, inductive energy ensuring maximum power transfer over adjacent storage, artificial lines, etc. transmission lines. These reactors are series connected on transmission lines up to 800 kV. Smoothing Reactors Smoothing reactors reduce the magnitude off the ripple current...

Other Design Services • agnetic field analysis and mitigation techniques M • lectrical system studies and analysis E • ransient Recovery Voltage mitigation techniques T • Support structure design and turnkey installation 350kV HVDC smoothing reactor with seismic damping system 500kV COT (A) bushing under seismic testing AC harmonic filter reactors with sound mitigation shields

Iron Core - Iron Shielded - Oil Immersed Reactors Resonant Grounded Systems Use of an ASC offers the following operating benefits: The most common type of failure in electric power systems • ssentially lower ground fault currents when compared to resistor E grounded or isolated systems is the single-phase to ground fault. It is the reason for up to 80% of all disturbances on high voltage systems. Significant improvement in power quality is achieved through the reduction of power outages by operating a network as a resonant grounded system (also known as a compensated system) by connecting the...

• arth Fault Compensation controller (EFC) E T his electronic device can be supplied to provide automatic tuning of the continuously adjustable ASC to the actual system capacitance to ground. Trench® has been the standard driving manufacturer of such equipment for more than 25 years. Besides the traditional air core dry type reactors, Trench® designs and manufactures specialty reactors which utilize iron core, iron shielded and/or oil immersed construction. Applications of these reactors include: • DC reactors to reduce ripple currents in DC drive systems • Three-phase variable shunt reactors...

Instrument Transformers Instrument transformers transform currents and voltages to measurable levels. Worldwide Trench® is one of the largest Insulation Systems suppliers of instrument transformers with the broadest and From 25 kV to 800 kV, Trench® offers current transformers most complete product line for high and extra-high voltage (CT), potential transformers (PT) and combined instrument applications. All instrument transformers feature quality, transformers (CIT) utilizing oil/paper or SF6 gas insulation outstanding characteristics and an excellent price/ systems. Our customers have the...

Current Transformers Current transformers are available for applications from 25 kV to 800 kV systems, for relaying and/or metering circuits. Multi-ratio relaying cores, metering cores and special anti-remanence cores are offered in various combinations. All Trench® current transformer designs are based in “top core” or “head type” construction. Features of this design and construction include: • xtremely high mechanical strength under shortE circuit conditions • Immunity to localized core saturation • egligible voltage drop across primary winding N • Hermetically sealed construction • High seismic...

Instrument Transformers Potential Transformers In AC transmission systems, the Trench® RC voltage transformers are used for the measurement of harmonics, Inductive voltage transformers are designed for 25 kV indeed they give an accurate representation of the voltage to 800 kV systems and are used to provide voltage for over a wide frequency band, (typically from DC up to metering and protection applications. 500 kHz), and are not sensitive to the trapped charges phenomena. Features of Trench PT’s include: ® For AIS, the Trench® RC dividers are available up to 800 kV, • odern, lightweight design...