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
  
                
CST-1030


Current Transformers CURRENT SENSE TRANSFORMER, PRIMARY CURRENT: 30 AMPS:
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Triad 4401
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USD 5.8926
Multiples of: 1

Through_Hole-30 A1000:146 OhmsRadial30.2 mm14.3 mm30.2 mm 50 Hz / 60 Hz 
CSE187L


Current Transformers 1:500ratio 110mV LOW FREQ SENSE
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Triad 1929
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USD 1.9031
Multiples of: 1

Through Hole 30 A1:50021 OhmsRadial0.85 in0.85 in0.71 in 50 Hz to 400 Hz 
CST-1020


Current Transformers CURRENT SENSE TRANSFORMER, PRIMARY CURRENT: 20 AMPS
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Triad 1626
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USD 4.4678
Multiples of: 1

Through_Hole    Radial23.5 mm12 mm24.8 mm   
CSE186L


Current Transformers LOW FREQUENCY CURRENT SENSE TRANSFORMER .1 to 10 AMP @ 50 to 400Hz: CSE186L
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Triad 1048
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USD 1.9078
Multiples of: 1

Through Hole-10 A1:16623 OhmsRadial24 mm21.5 mm18 mm 50 Hz to 400 Hz 
CST206-1A


Current Transformers CURRENT SENSE 14.0mH 100T ENCAP TORIOD/CST206-1A
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Triad 769
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USD 4.6851
Multiples of: 1

Through_Hole14 mH110 A100:158 mOhmsRadial27.3 mm10.16 mm31.11 mm20 KHz to 250 KHz20 KHz to 250 KHz 
CSE5-100401


Current Transformers Sense/High Frequency 1140mohm DCR, 320uH
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Triad 727
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USD 2.0606
Multiples of: 10

Smd/smt320 uH10 A1:401.14 OhmsSmd/smt7.7 mm6.9 mm5.33 mm 250 KHz + 
CSE5-100201


Current Transformers SMD CURRENT SENSE TRANSFORMER; TR=1:20, SEC L=80 H MIN, SEC DCR= 550 m MAX
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Triad 558
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USD 1.9078
Multiples of: 1

Smd/smt80 uH10 A1:20550 mOhmsSmd/smt7.7 mm6.9 mm5.33 mm 250 KHz + 
CST306-3A


Current Transformers CURRENT SENSE 55.0mH 200T ENCAP TORIOD/CST306-3A
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Triad 548
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USD 3.7191
Multiples of: 1

Through_Hole55 mH25 A200:13.75 OhmsRadial17.53 mm9.78 mm23.24 mm 20 KHz to 200 KHz 
CST206-3A


Current Transformers 70mH 130A SENSING
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Triad 485
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USD 4.6851
Multiples of: 1

Through_Hole130 mH70 A300:112.4 OhmsRadial27.3 mm10.16 mm31.11 mm20 KHz to 250 KHz20 KHz to 250 KHz 
CSE187L-P


Current Transformers 1:500ratio 110mV Potted Coil
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Triad 446
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USD 2.9705
Multiples of: 1

Through Hole 30 A1:50021 OhmsRadial0.85 in0.85 in0.71 in 50 Hz to 400 Hz 
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