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Three Phase Current Transformers

Category:
General Details

Three Phase Current Transformers

Function:

Three Phase Current Transformers (CTs) are current transformers designed for use with ammeters, watt meters and cross current compensation or for relay driver application. These units are available in the 600 v class series, and offer CSA approval.

Three Phase Current Transformers can handle more power than a 1-phase transformer and can be used to supply both 1-phase and 3-phase loads. The power handling capacity of a single-phase transformer is less due to use of only one set of windings.
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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.
These units are the current sensing units of the power system and are used at generating stations, electrical substations, and in industrial and commercial electric power distribution.

Advantages:

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

  • 3 Phase
  • 10KV BIL Full Wave
  • 600 V Class

Applications:

Standards:

  • IEEE C57.13

Approvals:

  • CSA
  • UL

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SORTED BY WINDOW SIZE BELOW

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Three Phase Current Transformers

3P4  Window 1.56″, Ratios 50-5 to 1200-5, Phase Center 3.56″, Non-Relay Class

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Three Phase Current Transformers

3P40 Window 1.75″, Ratios 100-5 to 500-5, Phase Center 4.50″, Relay Class C10-C20 

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3P41 Current Transformer

3P41 Window 2.00″, Ratios 100-5 to 600-5, Phase Center 4.50″, Relay Class C10-C20 

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3P42 Current Transformer

3P42 Window 2.50″,Ratios 100-5 to 1600-5, Phase Center 4.50″, Relay Class C10-C20 

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3P43 Current Transformer

3P43 Window 3.00″,Ratios 200-5 to 2000-5, Phase Center 2.31″, non-relay class 

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3P60 Current Transformer

3P60   Window 1.25″ to 2.50″,Ratios 50-5 to 1000-5, Phase Center 4.50″, non-relay class

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Pictures

 

Specs

3P4  Window 1.56″, Phase Center 3.56″, Non-Relay Class

3P40 Window 1.75″, Phase Center 4.50″, Relay Class C10-C20

3P41 Window 2.00″, Phase Center 4.50″, Relay Class C10-C20

3P42 Window 2.50″, Phase Center 4.50″, Relay Class C10-C20

3P43 Window 3.00″, Phase Center 2.31″, Non-Relay class

3P60  Window 1.25″ to 2.50″,Ratios 50-5 to 1000-5, Phase Center 4.50″, non-relay class

Installation

CT Ratio Modification

CTs How to install

Approvals
  • CSA
  • UL
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Crompton Technology Inc.
7538 Bath Road
Mississauga, Ontario
L4T 1L2
905-671-2304
1-800-220-5356
905-671-3661