Product categories – SCTxxxx current transformer
Breakdown of the type designation of the SCT current transformer
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Coil current transformers
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In order to guarantee the power transmission, current transformers need a correspondingly large measuring core volume with decreasing primary nominal currents. The dimensions of standard current transformers would quickly hit their limits on the basis of this physical principle. The SCT0xxx coil current transformers with electrical isolation are specially designed for these low primary nominal currents and are used in corresponding applications.
Coil current transformers | |
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Accuracy class 1, | |
Accuracy class 0.5, |
Mini ring-type current transformer
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The SCT1111 mini ring-type current transformer can be positioned on a DIN rail by means of snap-on mounting and is thus suitable for measurements in very tight installation spaces, e.g. directly in the sub-distribution unit. Two current transformers are attached to the DIN rail, while the third current transformer is plugged into the fastened current transformers. The connection is realized via removable picoMAX® connectors, which enables pre-wiring.
Mini ring-type current transformer | |
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Accuracy class 1, |
Ring-type current transformer
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The SCT2xxx series offers a large selection of ring-type current transformers for primary currents from 60 to 2500 A in six sizes and two accuracy classes. The innovative screwless connection technology for rigid and flexible conductors saves time – ferrules can be dispensed with here.
Ring-type current transformer | |
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Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, |
3-phase ring-type current transformers
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The compact SCT3xxx 3-phase ring-type current transformers for direct mounting below commonly used power switches measure primary currents from 3 x 50 to 3 x 600 A, with secondary currents of 1 or 5 A. The SCT3xxx series is available throughout in accuracy class 1 and is supplemented by the SCT3121-0125 and SCT3121-0150 current transformers in accuracy class 0.5.
3-phase ring-type current transformers | |
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Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 1, |
Ring-type current transformer for differential current measurement
![Product categories – SCTxxxx current transformer 6:](Images/png/12344432651__Web.png)
The increasing prevalence of DC loads (e.g., LED lighting, DC motor drives, 48 V DC bus systems, etc.), distributed DC generation (e.g., PV systems, UPS, batteries, etc.), and high-frequency converters (e.g., SMPS, motor drives, etc.) in industrial environments makes it increasingly difficult to reliably measure insulation faults with conventional current transformers designed for AC 50/60 Hz with limited measurement bandwidth.
Differential current transformers of the SCT5xxx series can be used here. Monitoring residual currents with the SCT5xxx in real-time in a power system opens up the possibility of evaluating the condition of the electrical insulation based on the actual measured value, so that the long-term trend of the residual current value can be used for planning maintenance to detect significant deterioration of the insulation.
This means that residual current monitors (SCT5xxx) used in a condition-based monitoring scheme Industrie 4.0-Standards, can detect faults in a timely manner and increase the availability of power supplies or plants at a much lower cost than conventional, expensive, and time-consuming high-voltage insulation testing.
Ring-type current transformer for differential current measurement | |
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Measuring ranges 400 mA / 2 A, type B / B+, transformer opening 70 mm |
Split-core current transformers
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The separable measuring system of the SCT6xxx split-core current transformers enables flexible retrofitting without disconnecting the primary conductor. Due to the minimal installation effort, they are suitable for use in places that are difficult to access or where space is limited. Four sizes are available. Accuracy class 3 is suitable for primary currents from 60 to 150 A, accuracy class 1 for 200 to 1000 A.
Split-core current transformers | |
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Accuracy class 3, | |
Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, |
Busbar split-core current transformers
![Product categories – SCTxxxx current transformer 8:](Images/jpg/8137452171__Web.jpg)
Like the SCT6xxx series, the SCT7xxx busbar split-core current transformers for primary currents up to 5000 A can be retrofitted to existing systems with no great mounting effort. From 500 A, there is a choice between accuracy class 0.5 and 1 for each primary current. The SCT7105-0100 and SCT7105-200 current transformers support accuracy class 3.
Busbar split-core current transformers | |
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Accuracy class 3, | |
Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, | |
Accuracy class 1, | |
Accuracy class 0.5, |