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Manufacturers : Electronic components : Transformers : Instrument transformers
An instrument transformer is a transformer designed to transform the conditions of current or voltage and phase position in the primary to measurable values to allow an attached instrument to gauge the current or voltage. They function to convert primary voltages and currents to values which are suitable for use in various types of meters, relays, and control circuits. There are several types of instrument transformers which include current transformers, voltage transformers (also called potential transformers), and pulse transformers. Potential transformers are used for measuring the voltage in a primary circuit and current transformers are used for measuring the current in a primary circuit. Potential transformers are connected across line conductors in a primary circuit or between a line conductor in a primary circuit and a ground conductor in a grounded system. The primary winding of current transformers is normally connected in series with a line conductor. Potential and current transformers are used as pilot devices for voltmeters, ammeters, power factor meters, watt meters, demand meters, watt hour meters, and in a variety of control circuits ranging from circuits for controlling motors to circuits for controlling the operation of metal clad switchgear breakers.

Listings on Electronic components : Transformers : Instrument transformers

  • Instrument Transformer Equipment Corporation
    Original equipment manufacturer of instrument transformer products divided into two application areas including revenue metering and protective relaying. Offers a broad variety of product designs well suited for voltage transformer and current transformer service areas. Also offers various support and technical services relating to the application and in-service needs for instrument transformer products. USA.
    http://www.itec-ctvt.com
  • Amveco, Inc.
    Manufactures instrument transformers (low voltage current transformers, AC series 50/60Hz current transformers), power transformers (three-phase toroidal transformers, auto-transformers, PC mount toroidal step-down transformers, medical grade high isolation toroidal transformers, miniature low profile transformers), custom designed chokes, power inductors, storage chokes, common mode chokes, EMI suppression products, pulse transformers, and high frequency current transformers. USA.
    http://www.amveco.com
  • ARTECHE Group
    Supplier of current transformers, inductive voltage transformers, capacitive voltage transformers and coupling capacitors, combined instrument transformers, line traps, reclosers, instantaneous / monostable auxiliary relays, latching relays, time relays / time-lag relays, function and measuring relays, surveillance relays / earth fault indicators and detectors, protection relays, substation integrated protection and control, PLC (power line communications) coupling solutions for medium voltage powerlines, AC metal-clad switchgear and controlgear. Spain.
    http://www.arteche.es
  • Automatic Electric Ltd.
    Manufacturer of instrument transformers, analogue panel instruments, digital voltmeter ammeter / frequency meter, voltameter with built in selector switch, factor meter, power line transducers, regular shunts, lightweight shunts, synchroscope, phase sequence indicator, frequency meters, automatic AC voltage stabilizers, males rectifiers, auto transformers, isolation transformers, and battery chargers. India.
    http://www.aelindia.com
  • Jingke Instrument Transformer
    Manufacturer of SF6 head type current transformer, oil paper insulation current transformer, oil paper insulation current transformer, oil paper insulation head type current transformer, SF6 gas insulation voltage transformer, capacitive voltage transformer, high voltage switchor, and oil immersed capacitive bushing. China.
    http://www.jsjk.com
  • Kuhlman Electric Corporation
    Designs, manufactures and markets a broad range of electrical transformers for use on the electric utility system. Products include electrical busbar systems, instrument transformers, large power transformers, medium power transformers, mobile substations, transformer coolers and pumps, transformer monitoring and control instruments, outdoor molded current and voltage transformers, poletop, padmount, oil-filled, and submersible distribution transformers. USA.
    https://www.kuhlman.com
  • Mahendra Electrical Works
    Manufacturing various types of instrument transformers, ring type oil immersed bushing current transformers, outdoor oOil cooled current transformers, LT bar primary moulded case current transformers, custom made current transformers, potential transformers, LT bar primary tape wound current transformers, wound primary LT resin cast current transformers, and control transformers. India.
    http://www.mewindia.com
  • Pfiffner Instrument Transformers Ltd.
    Manufactures high voltage instrument transformers up to 525 kV (inductive voltage transformers, capacitive voltage transformers, head type current transformers, tank type current transformers, combined transformers), current and voltage transformers for GIS, slip-over and split-core current transformer for high voltage cables, high current transformers, low voltage current transformers, medium voltage instrument transformers, and bushing type current transformers. Switzerland.
    http://www.pmw.ch
  • Ritz Instruments Transformers, Inc.
    Manufactures coupling capacitor voltage transformers, current transformers, voltage transformers, combined metering units, coupling capacitors, breaker capacitors, outdoor current transformers, indoor voltage transformers, primary metering sets, sensors, sensors for medium voltage and low voltage applications, generator current transformers, line traps, and reactors. USA.
    http://www.ritzusa.com
  • Trench Limited
    Specializes in the design and manufacture of specialty electrical products for electric utilities and industrial power users. Products include dry type air core reactors (inductors), instrument transformers, transformer bushings, relay communications products, wave traps, line tuners and specialized protection and control equipment.
    http://www.trenchgroup.com
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