General Purpose Current Transformers

Function:

General Purpose Current Transformers offered in 600 v Class. These high quality durable rugged current transformers are typically used for metering/protection such as ammeters, voltmeters, watt meters, or energy systems, and have CSA/UL approval.

Units are available with Leads or Terminals, in a variety of Window style openings.

Where do people use General Purpose Current Transformers ?

These current transformers are used mainly in low and medium voltage switchgear, MCC’s, and low voltage switchboards and panels, as well as generating stations, and electrical substations.

What is a Current Transformer?

A Current Transformer (CT) is a type of transformer that is used to reduce or multiply an alternating current (AC). It produces a current in its secondary which is proportional to the current in its primary.

Current Transformers, along with voltage or potential transformers, are instrument transformers. Instrument transformers scale the large values of current to small, standardized values that are easy to handle for measuring instruments and protective relays. The Instrument transformers isolate measurement or protection circuits from the high voltage of the primary system. These units provide a secondary current that is accurately proportional to the current flowing in its primary, presenting a negligible load to the primary circuit.

Advantages:

Advantages are that the units can measure high current easily, high electrical isolation, simple construction, and easy maintenance and installation.

Background:

The Crompton Instruments product range represents one of the largest product offerings of power measurement, control, and protection instrumentation, for switchgear and generator set manufacturers, panel builders and OEMs.

Features:

• Leads or Terminals
• Metering/Protection Accuracy
• Window Style

Applications:

• Ammeters
• Energy Systems
• Low Voltage panel boards
• Low Voltage switchboards
• Motor Control Centers (MCC)
• Voltmeters
• Wattmeters

Standards:

• IEEE C57.13

Approvals:

• CSA 
• UL

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General Purpose Current Transformers MODELS SORTED BY WINDOW SIZE BELOW

2    (1.00″ window)(50-300 A )  

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5   (1.56″window)(50-1200 A)   

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 6   (2.06″window)(100-1500 A)   

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 7    (2.50″window)(100-1600 A) 

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8     (3.25″window)(200-4000 A)   

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170   (4.25″window)(200-4000 A)   

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120     (5.75″window)(200-4000 A)   

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125    (6.31″window)(600-4000 A) 

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 126    (8.25″window)(400-5000 A)   

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