Oil-insulated Combined Instrument Transformers

Product catalog summary

Introduction
Trench is a leading manufacturer of high voltage equipment, specializing in Instrument Transformers for 69 - 800 kV systems. These transformers convert high voltages and currents to standardized values for metering, protection, and control. The document focuses on the IVOKT Combined Instrument Transformers, which integrate voltage and current transformation in one unit.

Oil/Paper-Insulated Units
The IVOKT transformers use a refined oil/paper insulation system, minimizing weight and oil volume. They feature high-quality mineral oil, are PCB-free, and support high short circuit currents. The design includes a finely graded bushing system for insulation stress control and excellent seismic capability. The units are hermetically sealed and require only one foundation in the switchyard.

Features
The transformers meet IEC and ANSI standards, with primary currents up to 5000 A and secondary currents of 1 A, 2 A, or 5 A. They offer stable accuracy, are unaffected by external magnetic fields, and have a long lifespan of over 30 years. The design includes corrosion-resistant materials and explosion resistance features.

Construction
The IVOKT and TMC transformers are constructed with a reliable oil/paper insulation system. They include stainless steel expansion bellows and are designed for low dielectric stresses. The current transformer section is based on Trench's IOSK design, while the voltage transformer uses the VEOT design.

Standard and Optional Equipment
Standard equipment includes aluminum terminals, lifting lugs, and a secondary terminal box. Optional equipment includes anti-corona rings, capacitance taps, and composite insulators.

Electrical and Mechanical Data
The document provides detailed electrical and mechanical specifications for various IVOKT and TMC models, including test voltages, impulse withstand capabilities, and dimensions.

Contact Information
The document lists contact details for Trench facilities worldwide, including locations in Austria, Brazil, China, Canada, France, Germany, Switzerland, and the UK.

Catalog excerpts

Oil-insulated Combined Instrument Transformers-1

Combined Instrument Transformers Types IVOKT and TMC

Open the catalog to page 1

Oil-insulated Combined Instrument Transformers-2

Combined Instrument Transformers Introduction Trench is a recognized world leader in the design and manufacture of high voltage equipment for application on electric utility and high energy industrial systems. As part of Trench's product scope, the Company produces a diversified range of Instrument Transformers which are installed on 69 - 800 kV electrical systems. Instrument Transformers include: Voltage (Potential) Transformers (both inductive and capacitive type), Current Transformers and Combined Instrument Transformers (voltage and current transformer in one unit). Fig. 1 Type IVOKT 123...

Open the catalog to page 2

Oil-insulated Combined Instrument Transformers-3

Features • Meet all IEC and ANSI metering and protection classes, including special core classes TPS, TPX, TPY and TPZ (other standards on request) • rated primary currents up to 5000 A • rated secondary current 1 A, 2 A or 5 A • Primary reconnection available • standard thermal burden ratings of 2000-2500 VA (higher on request) • quality Assurance in accordance with ISO 9001. Oil/paper-insulated units • highly refined and processed oil/paper insulation system • low weight and minimum oil volume • use of high quality mineral oil, PCB free, biological decomposition • short symmetrically arranged...

Open the catalog to page 3

Oil-insulated Combined Instrument Transformers-4

Construction Trench types IVOKT and TMC Combined Instrument Transformers are designed and constructed with the well proven, highly reliable, oil/paper insulation system. Each porcelain housed, hermetically sealed combined instrument transformer is equipped with stainless steel expansion bellows, calibrated to the internal oil volume and extremes in operating and ambient temperatures. Fig.3 Type IVOKT Combined Instrument Transformers Standard Equipment • Aluminum flat pad primary terminal and ground terminal The current transformer section is based on the head type construction of Trench type...

Open the catalog to page 4

Oil-insulated Combined Instrument Transformers-8

Trench Facilities The Trench Group is your partner of choice for electrical distribution solutions today; your new technology solutions Trench® Austria GmbH Trench® Brasil Ltda Contagem, Minas Gérais Trench® China Minhang, Shanghai Peoples Republic of China Trench® High Voltage Jing Shen Xi San Street Dao Yi Economic Development Zone Trench® Limited Bushing Division Ajax, Ontario Trench® Limited Coil Product Division Scarborough, Ontario Trench® Limited Instrument Transformer Division Scarborough, Ontario Trench® Limited Power Line Carrier Division k815 Middlefield Road, Unit 6A Scarborough,...

Open the catalog to page 8