About Current Transformers

Triad Current Transformers

A Current Transformer (CT) is a device designed to reduce an alternating current (AC) to a much lower, safer level. It is usually found in electric power systems for metering and/or protective relaying purposes. They are used to measure the level of current flowing through circuits and in most cases are connected to a meter or other monitoring device. The current transformer uses the concepts of electrical transformer to transform current levels between the primary (higher current) and secondary (lower current) windings. A typical current transformer is a wire wound toroidal core transformer, with a single primary winding, connected in series with the load, and a multiple secondary windings designed to provide an output current proportional to the current flowing through the primary.

Current Transformers

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(Ex. GST)(▲▼)		Enter Qty Mounting StyleInductanceCurrent RatingTurns RatioSecondary ResistanceTermination StyleLengthWidthHeightFrequencyFrequency RangeQualification
  
                
CST206-2T


Current Transformers CURRENT SENSE 56.0mH 200Tct ENCAP TORIOD/CST206-2T
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Triad Availability : 126
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USD 5.6511
Multiples of: 1

Through_Hole56 mH80 A200Ct3.5 OhmsRadial27.3 mm10.16 mm31.12 mm20 KHz to 250 KHz20 KHz to 250 KHz 
CST206-3T


Current Transformers CURRENT SENSE 130.0mH 300Tct ENCAP TORIOD/CST206-3T
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Triad Availability : 123
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USD 4.8338
Multiples of: 1

Through_Hole130 mH70 A300Ct12.4 OhmsRadial27.3 mm10.16 mm31.12 mm20 KHz to 250 KHz20 KHz to 250 KHz 
CST-1010


Current Transformers CURRENT SENSE TRANSFORMER, PRIMARY CURRENT: 10 AMPS
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Triad Availability : 120
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USD 4.5402
Multiples of: 1

Through_Hole 10 A1000:140 OhmsRadial23.5 mm12 mm24.8 mm 50 Hz / 60 Hz 
CST-1025


Current Transformers CURRENT SENSE TRANSFORMER, PRIMARY CURRENT: 25 AMPS:
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Triad Availability : 97
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USD 5.8926
Multiples of: 1

Through Hole 25 A1000:146 OhmsRadial30.2 mm14.3 mm30.2 mm 50 Hz / 60 Hz 
CSE185L


Current Transformers CSE185L - LOW FREQUENCY CURRENT SENSE TRANSFORMER .1 to 3 AMP @ 50 to 400Hz:
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Triad Availability : 82
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USD 1.9684
Multiples of: 1

Through_Hole-3 A1:5023 OhmsRadial24 mm21.5 mm18 mm 50 Hz to 400 Hz 
CST306-1T


Current Transformers CURRENT SENSE 3.5mH 50Tct ENCAP TORIOD/CST306-1T
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Triad Availability : 77
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USD 3.6467
Multiples of: 1

Through_Hole3.5 mH35 A50Ct340 mOhmsRadial27.3 mm10.16 mm31.11 mm20 KHz to 200 KHz20 KHz to 200 KHz 
CST25-0050


Current Transformers PCB Curr Sense Xfmr 1:50,50-500KHz
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Triad Availability : 46
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USD 1.5094
Multiples of: 1

Through Hole4.7 mH25 A1:500.5 OhmsSolder Pin17 mm15 mm11.8 mm 50 KHz to 500 KHz 
CST25-0500


Current Transformers PCB Curr Sense Xfmr 1:500,50-500KHz
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Triad Availability : 19
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USD 1.231
Multiples of: 1

Through Hole470 mH25 A1:50016 OhmsSolder Pin17 mm15 mm11.8 mm 50 KHz to 500 KHz 
CST306-2T


Current Transformers CURRENT SENSE 14.0mH 100Tct ENCAP TORIOD/CST306-2T
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Triad Availability : 10
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USD 3.7674
Multiples of: 1

Through_Hole14 mH25 A100Ct1.55 OhmsRadial27.3 mm10.16 mm31.11 mm20 KHz to 200 KHz20 KHz to 200 KHz 
CSE5-100501


Current Transformers Sense/High Frequency 1500mohm DCR, 500uH
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Triad Availability : 3
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USD 0.4189
Multiples of: 1

Smd/smt500 uH10 A1:501.5 OhmsSmd/smt7.7 mm6.9 mm5.33 mm 250 KHz + 
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