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.
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
Dimension
F : 50Hz
| 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
| 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 |
Ⅱ. ACB & GIS Application Rogowski Coils
Dimension
F : 50Hz
| 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
| 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 |
Ⅲ. Switch Gear Application Rogowski Coils (Model : TFR610)
Dimension
unit:mm
| 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% |
