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Dent CT-R47-A4-U RoCoil Flexible Current Transformer, 47"

Model: CT-R47-A4U | Order No: CTR47A4U

Dent CT-R47-A4-U RoCoil Flexible Current Transformer, 47"-


Downloads: datasheet manual

Dent CT-R47-A4-U RoCoil Flexible Current Transformer, 47"

Model: CT-R47-A4U | Order No: CTR47A4U

Designed for accurate non-intrusive measurement of AC current, pulsed DC or distorted waveforms where conventional rigid core CTs are unsuitable. This type of sensor may be used to measure AC current over a wide dynamic range and from 20 Hz to 5 kHz. It features a length of 47".

Designed for accurate non-intrusive measurement of AC current, pulsed DC or distorted waveforms where conventional rigid core CTs are unsuitable. This type of sensor may be used to measure AC current over a wide dynamic range and from 20 Hz to 5 kHz. It features a length of 47".

Your Price $275.00 USD
Availability 1 to 2 Weeks
Quantity

Add In-House Traceable Calibration to your CTR47A4U

Add In-House Traceable Calibration to your CTR47A4U


Dent CT-R47-A4U Specifications

Electrical
Output Signal 131 mV/1000A at 60 Hz
109.2 mV/1000A at 50 Hz
Wire Colors White = (+) positive
Brown = (-) negative
Bare wire = shield
Phasing Arrow points towards load
Phase Shift <0.2° at 50/60 Hz
Frequency Range 20 Hz to 5 kHz
Useful Current Range 5 to 5000A AC
Accuracy (typical) <0.6%
Linearity ±0.2%
Temperature Sensitivity 0.07% per °C
Mechanical
Coil Materials Blue thermoplastic rubber, flame retardant UL 94 V-0 rated
Coupling Materials PA6 UL 94 V-0 rated
Shielding 100% transducer, 100% output lead
Working Temperature -4 to 158°F (-20 to 70°C)
Length 47" (120 cm)
Window Size 14.6" (37 cm)
Safety
Working Voltage 1000 Vrms maximum
Dielectric Strength 7400 VAC around coil
1000 VAC rated leads
Certifications Conforms to UL STD 61010-1
Certified to CAN/CSA STD C22.2
No. 61010
Click here for complete specifications on the Dent CT-R47-A4U

What's included with the Dent CT-R47-A4U

  • Dent CT-R47-A4-U RoCoil Flexible Current Transformer, 47"
  • Extending the Leads on Your DENT Current Transformer

    One of the most frequently asked questions in our tech support department is this: "Can I get CTs with longer leads or extend the leads myself? What's the maximum length for CT leads?".

    Standard lead length for a DENT current transformer is 3 meters (with a 7 meter option available for some models). Occasionally, because of electrical room layout or other factors, there is a requirement for longer leads on a current transformer. Therefore, extending the CT leads is necessary. The following is a brief overview of options for extending CT leads based on CT type. Note that the length recommendations listed below apply to PowerScout Series and ELITEpro XC instruments ONLY. To extend RoCoil leads for use with the TCA-5, please contact our experts to get advice specific to your application.

    Split-Core/Hinged Split-Core Current Transformers (Including Revenue Grade Hinged Split Cores)

    DENT Split-Core/Hinged Split-Core Current Transformers - ITM Instruments
    MAXIMUM LENGTH

    Split-Core Current Transformers leads can be extended up to 500 feet using extensions of the same wire type/AWG.

    WIRE TYPE

    600 V Rated VW-1, 105°C, 20 AWG, black and white twisted pair, cURus

    RECOMMENDED SPLICING METHOD/MATERIALS

    Sure-Connect sealed butt splices which require a crimping tool and hot air gun. Always follow manufacturer's instructions.


    RoCoil Current Transformers

    DENT RoCoil Current Transformers - ITM Instruments
    MAXIMUM LENGTH

    RoCoil CT leads can be extended up to 100 feet using extensions of the same wire type/AWG.

    WIRE TYPE

    "Bare" RoCoil: Shielded cable with thermoplastic insulation, 1000 V AC VW-1, 2 x 26 AWG, 80°C, cURus

    RECOMMENDED SPLICING METHOD/MATERIALS ("BARE ROCOIL ONLY)

    Sure-Connect sealed butt splices which require a crimping tool and hot air gun. Always follow manufacturer's instructions.


    Solid Core (Toroid) Current Transformers

    DENT Solid Core (Toroid) Current Transformers - ITM Instruments
    MAXIMUM LENGTH

    Solid Core (Toroid) CT leads can be extended up to 500 feet using extensions of the same wire type/AWG.

    WIRE TYPE

    UL1015 24 AWG 7 Strand Black & White Twisted Pair (1 twist per inch), 600 V rated

    RECOMMENDED SPLICING METHOD/MATERIALS

    Sure-Connect sealed butt splices which require a crimping tool and hot air gun. Always follow manufacturer's instructions.

    Optimizing Performance from Rogowski Coil Current Transformers

    DENT Rogoski Coil - ITM Instruments
    WHAT IS A ROGOWSKI COIL?

    Rogowski coil, named after Walter Rogowski, is an electrical device for measuring alternating current (AC) or high-speed current pulses. It consists of a helical coil of wire with the lead from one end returning through the center of the coil to the other end so that both terminals are at the same end of the coil. The whole assembly is then wrapped around the straight conductor whose current is to be measured.

    Since the voltage that is induced in the coil is proportional to the rate of change of current in the straight conductor the output of the Rogowski coil is usually connected to an electrical (or electronic) integrator circuit in order to provide an output signal that is proportional to the current.

    The relationship between voltage and rate of change of current is explained in the following equation where "V" is voltage and "M" is a constant:

    DENT Rogoski Coil - ITM Instruments
    WHY CHOOSE A ROGOWSKI COIL CURRENT TRANSFORMER?
    Flexible Rogowski Coils, such as the DENT RoCoil, are designed for easy placement around cable bundles, large buss bars, or within tight breaker panels. Their design has several advantages over traditional split core current transformers including:

    1. Open-ended, flexible design allows it to be wrapped around a live conductor without disturbing it.
    2. Rogowski coils feature an air core rather than an iron core, which results in low inductance and faster response time to changing currents.
    3. Highly linear, even when subjected to large currents such as those used in electric power transmission, welding, or pulsed power applications.
    4. Largely immune to electromagnetic interference.
    HOW TO MAXIMIZE PERFORMANCE FROM A ROGOWSKI COIL CURRENT TRANSFORMER

    Rogowski coil accuracy is usually calibrated with the conductor centered in the CT window. In practice, however, the CT typically hangs on the conductor which can introduce measurement errors. Note that the error is greatest when the CT connector hangs on the conductor. The following diagram outlines the error introduced simply by moving the conductor to different positions within the opening of the Rogowski coil.

    DENT Rogoski Coil - ITM Instruments

    Best practice for Rogowski coil installation is to center the conductor as best as conditions allow. In addition, it's a good idea to keep any other conductors (those you do not wish to measure) at a minimum distance of 2x the diameter of the Rogowski coil CT.

    Also, keep in mind that although a Rogowski coil is ideal for large amperage loads, accuracy of the coil may be reduced on smaller loads (<20 A).

    Customer Reviews for the Dent CT-R47-A4U

    Ask a question about Dent CT-R47-A4-U RoCoil Flexible Current Transformer, 47"

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    Dent CT-R47-A4U Specifications

    Electrical
    Output Signal 131 mV/1000A at 60 Hz
    109.2 mV/1000A at 50 Hz
    Wire Colors White = (+) positive
    Brown = (-) negative
    Bare wire = shield
    Phasing Arrow points towards load
    Phase Shift <0.2° at 50/60 Hz
    Frequency Range 20 Hz to 5 kHz
    Useful Current Range 5 to 5000A AC
    Accuracy (typical) <0.6%
    Linearity ±0.2%
    Temperature Sensitivity 0.07% per °C
    Mechanical
    Coil Materials Blue thermoplastic rubber, flame retardant UL 94 V-0 rated
    Coupling Materials PA6 UL 94 V-0 rated
    Shielding 100% transducer, 100% output lead
    Working Temperature -4 to 158°F (-20 to 70°C)
    Length 47" (120 cm)
    Window Size 14.6" (37 cm)
    Safety
    Working Voltage 1000 Vrms maximum
    Dielectric Strength 7400 VAC around coil
    1000 VAC rated leads
    Certifications Conforms to UL STD 61010-1
    Certified to CAN/CSA STD C22.2
    No. 61010
    Click here for complete specifications on the Dent CT-R47-A4U

    What's included with the Dent CT-R47-A4U

  • Dent CT-R47-A4-U RoCoil Flexible Current Transformer, 47"
  • Extending the Leads on Your DENT Current Transformer

    One of the most frequently asked questions in our tech support department is this: "Can I get CTs with longer leads or extend the leads myself? What's the maximum length for CT leads?".

    Standard lead length for a DENT current transformer is 3 meters (with a 7 meter option available for some models). Occasionally, because of electrical room layout or other factors, there is a requirement for longer leads on a current transformer. Therefore, extending the CT leads is necessary. The following is a brief overview of options for extending CT leads based on CT type. Note that the length recommendations listed below apply to PowerScout Series and ELITEpro XC instruments ONLY. To extend RoCoil leads for use with the TCA-5, please contact our experts to get advice specific to your application.

    Split-Core/Hinged Split-Core Current Transformers (Including Revenue Grade Hinged Split Cores)

    DENT Split-Core/Hinged Split-Core Current Transformers - ITM Instruments
    MAXIMUM LENGTH

    Split-Core Current Transformers leads can be extended up to 500 feet using extensions of the same wire type/AWG.

    WIRE TYPE

    600 V Rated VW-1, 105°C, 20 AWG, black and white twisted pair, cURus

    RECOMMENDED SPLICING METHOD/MATERIALS

    Sure-Connect sealed butt splices which require a crimping tool and hot air gun. Always follow manufacturer's instructions.


    RoCoil Current Transformers

    DENT RoCoil Current Transformers - ITM Instruments
    MAXIMUM LENGTH

    RoCoil CT leads can be extended up to 100 feet using extensions of the same wire type/AWG.

    WIRE TYPE

    "Bare" RoCoil: Shielded cable with thermoplastic insulation, 1000 V AC VW-1, 2 x 26 AWG, 80°C, cURus

    RECOMMENDED SPLICING METHOD/MATERIALS ("BARE ROCOIL ONLY)

    Sure-Connect sealed butt splices which require a crimping tool and hot air gun. Always follow manufacturer's instructions.


    Solid Core (Toroid) Current Transformers

    DENT Solid Core (Toroid) Current Transformers - ITM Instruments
    MAXIMUM LENGTH

    Solid Core (Toroid) CT leads can be extended up to 500 feet using extensions of the same wire type/AWG.

    WIRE TYPE

    UL1015 24 AWG 7 Strand Black & White Twisted Pair (1 twist per inch), 600 V rated

    RECOMMENDED SPLICING METHOD/MATERIALS

    Sure-Connect sealed butt splices which require a crimping tool and hot air gun. Always follow manufacturer's instructions.

    Optimizing Performance from Rogowski Coil Current Transformers

    DENT Rogoski Coil - ITM Instruments
    WHAT IS A ROGOWSKI COIL?

    Rogowski coil, named after Walter Rogowski, is an electrical device for measuring alternating current (AC) or high-speed current pulses. It consists of a helical coil of wire with the lead from one end returning through the center of the coil to the other end so that both terminals are at the same end of the coil. The whole assembly is then wrapped around the straight conductor whose current is to be measured.

    Since the voltage that is induced in the coil is proportional to the rate of change of current in the straight conductor the output of the Rogowski coil is usually connected to an electrical (or electronic) integrator circuit in order to provide an output signal that is proportional to the current.

    The relationship between voltage and rate of change of current is explained in the following equation where "V" is voltage and "M" is a constant:

    DENT Rogoski Coil - ITM Instruments
    WHY CHOOSE A ROGOWSKI COIL CURRENT TRANSFORMER?
    Flexible Rogowski Coils, such as the DENT RoCoil, are designed for easy placement around cable bundles, large buss bars, or within tight breaker panels. Their design has several advantages over traditional split core current transformers including:

    1. Open-ended, flexible design allows it to be wrapped around a live conductor without disturbing it.
    2. Rogowski coils feature an air core rather than an iron core, which results in low inductance and faster response time to changing currents.
    3. Highly linear, even when subjected to large currents such as those used in electric power transmission, welding, or pulsed power applications.
    4. Largely immune to electromagnetic interference.
    HOW TO MAXIMIZE PERFORMANCE FROM A ROGOWSKI COIL CURRENT TRANSFORMER

    Rogowski coil accuracy is usually calibrated with the conductor centered in the CT window. In practice, however, the CT typically hangs on the conductor which can introduce measurement errors. Note that the error is greatest when the CT connector hangs on the conductor. The following diagram outlines the error introduced simply by moving the conductor to different positions within the opening of the Rogowski coil.

    DENT Rogoski Coil - ITM Instruments

    Best practice for Rogowski coil installation is to center the conductor as best as conditions allow. In addition, it's a good idea to keep any other conductors (those you do not wish to measure) at a minimum distance of 2x the diameter of the Rogowski coil CT.

    Also, keep in mind that although a Rogowski coil is ideal for large amperage loads, accuracy of the coil may be reduced on smaller loads (<20 A).

    Ask a question about Dent CT-R47-A4-U RoCoil Flexible Current Transformer, 47"

    Customer Reviews for the Dent CT-R47-A4U

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