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Rigid Rogowski Coils

Inquiry

Taehwatrans rigid Rogowski coils are an air cored (non-magnetic) toroidal windings positioned round the conductor. An alternating magnetic field generated by the current in the primary conductor induces a voltage in the coil. Thanks to low inductance and its non-magnetic core, Rogowski coils have the output voltage linearity proportional to the frequency increase and the output of the coil does not saturate for a high primary current more than 1kA and, leading to achieve a great accuracy on high current range. Traditional current transformers for high current measurement are bulky and heavy so that they seriously limit the design flexibility of systems. However, Rogowski coils with compact and light weight design, can provide great advantage for system design to be smarter and more compact.

Rigid Rogowski Coils Features Image

Application

- Smart reclosure in distribution grid
- Air circuit breakers(ACB)
- Gas insulation switchgear (GIS)
- Electronic sectionalizer
- Load balancing
- Power monitoring & Energy metering


Features

- Excellent accuracy
- Wider frequency up to 1 MHz
- High current measurement without saturation

Ⅰ. Miniature Rogowski Coils

Drawing

PCB Mountable Type
Lead Wire Type
TR71VA
TRIOLSC (Shield Cable)


Electrical Property & Dimension

Dimension

F : 50Hz

Dimension
Model
NO
DCR(Ω)
±6%
Rated
Current(A)
Max
Current(KA)
Self
Current(KA)
Mutual
Inductance
Max Stray
Noise Vo
Max Multual
Inductance Erro(%)
Output
Voltage at 100A
Instant
Peak Amp(KA)
TR77V/L 100Ω 1,000A 10kA 0.7mH 0.69µH 1.3mV 0.60% 21.6mV 64kA
TR71V/L 181Ω 9kA 7.6mH 3.25µH 0.3mV 0.03% 102.2mV 54kA
TR71VA 13.5Ω 13kA 0.4mH 0.80µH 0.3mV 0.12% 25.0mV 81kA
TR10VSH 173Ω 6kA 5.8mH 2.13µH 0.6mV 0.09% 66.9mV 39kA
TR10LSH
TR10LSC
TR9L 200Ω 6kA 20.9mH 4.48µH 4.0mV 0.28% 140.8mV 40kA


Dimension

unit:mm

Dimension
Model NO A(min) B(max) C(max) D(max) E(±0.3) F(±0.3) G(±0.5) H(±0.3)
TR77V 6.8 25.0 11.0 23.5 15.1 19.1 3.0 9.1
TR77L 6.9 23.6 11.0 26.8 7.1 71.0 3.0
TR71V 8.9 27.5 17.0 25.3 15.1 19.1 3.0 15.1
TR71L 8.9 24.8 17.0 28.4 7.6 65.0 3.0
TR71VA 8.9 27.7 20.3 25.3 15.1 9.0 3.0 4.0
TR10VSH 12.9 39.3 14.0 38.0 25.2 32.8 3.0 12.1
TR10LSH 12.9 37.5 14.0 41.3 10.3 240.0 5.0
TR10LSC 12.9 37.5 14.0 46.8 14.9 381.0 5.0
TR9L 19.6 48.2 19.2 52.0 13.2 270.0 5.0

Frequency Vs Typical Output Gain Diagram

TR10LSC Frequency Response
TR10LSC Phase Curve




Ⅱ. ACB & GIS Application Rogowski Coils

Drawing

Round Type (TR1L ~ TR4L)
Track Type (TR5L ~ TR8L)


Electrical Property & Dimension

Dimension

F : 50Hz

Dimension
Model
NO
Current
Rating(A)
Output
V at Primary
Max
Current(kA)
Self
Inductance
Mutual
Inductance
Max Stray
Noise Voltage
Max Mutual
Inductance Error(%)
TR1L 630A 16.97mV 55kA 1.72mH 0.856µ 0.3mV 0.18%
TR2L 1000A 44kA 0.69mH 0.54µ
TR3L 1250A 51kA 0.43mH 0.543µ
TR4L 1600A 60kA 0.26mH 0.34µ
TR5L 2000A 90kA 0.32mH 0.27µ
TR6L 2500A 120kA 0.2mH 0.22µ
TR7L 3200A 120kA 0.13mH 0.17µ
TR8L 4000A 90kA 0.33mH 0.14µ


Dimension

unit:mm

Dimension
Model NO A(min) B(max) B'(max) C(max) D(max) E(max) F(±7) G(±1)
TR1L 53.0 75.0 48.9 12.5 76.5 31.5 300.0 5.0
TR2L
TR3L
TR4L
TR5L 98.0 119.0 54.4 11.0 76.0
TR6L
TR7L
TR8L

Frequency Vs Typical Output Gain Diagram

TR1L Frequency Response
TR9L Frequency Response

Ⅲ. Switch Gear Application Rogowski Coils (Model : TFR610)

Drawing

Electrical Property & Dimension

Dimension

unit:mm

Dimension
A(min) B(max) C(max) D(max) F(±5) G(±1)
190 200 10 50 200 10
7.48" 7.87" 0.39" 1.97" 7.87" 0.38"


Electrical Property

Output (1000A, 60Hz) 400mV Operating Frequency 20Hz~20KHz
Standard Accuracy Class 0.5 Dynamic Current Range 72KA
Phase displacement 0.5° High Potential Volatge a.c.2500V
Reading Error (20% Rating) ≤ 0.75% Temp Range -40°C ~ +80°C
Max Positioning Error Avr.± 0.5%(max 1%) Insulation Resistance DC500V/100MΩ Min
Max External Stray Mutual
Inductance Error
(1000A, AC0.5mT)
< 0.1%


Frequency Vs Typical Output Gain Diagram

TFR610 Frequency Response