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TH0400 Precision Coaxial Shunt

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Introduction

  • TH0400, a series of 14 various ranges precision coaxial shunts.

  • TH0400 can work in the DC ~ 100 kHz frequency range, converting 1 mA ~ 100 A nominal current into 1 V small current.

  • DC ratio accuracy: 20 ppm;AC/DC difference: 20 ppm; phase displacement: 5.

  • It is suitable for calibration of AC/DC high current source, current sensor, DC shunt, and other occasions where current needs to be measured precisely.


Features

  • The nominal voltage is 1 V, can measure current by directly matching high-precision voltmeters or other measurement instruments.

  • For 1 mA, 10 mA and other high resistance current shunts, combine with the model TH0600 to avoid errors caused by wire connection or input impedance drops of digital meters at high frequency.

  • Compared to 0.5 V, 0.8 V and other voltage value, the 1V nominal voltage has a higher noise ratio, easier current conversion, faster error calculation, and accords with the 1-2-5 sequence principle of modern measurement.

  • Precision components and production processes ensure the resistance value stable, the typical resistance change value is ±5 μΩ/Ω in 1 year, and the maximum resistance change value is ±16 μΩ/Ω in 1 year.

  • Good heat dissipation, lower temperature coefficient and self-heating power factor ensure a good stability.

  • Small phase displacement between the input current and the sampled voltage, the phase displacement is less than 0.0015 ° even at 1 kHz. This feature is critical for the measurement of non-sinusoidal and wideband signals, applied to analyze power quality and calibrate digital power meters.

  • The capacity of loading current and withstanding current impulse is limited, but you can use a set of shunts to obtain a wide range of current measurement.


Specification


Resistance

Inom

Unom

(V)

Rnom

(Ω)

Initial Deviation   (μΩ/Ω)

Stability

(μΩ/Ω)

Temperature Coefficient

(ppm/K)

Power Coefficien

(μΩ/Ω)

Imax Load

Instantaneous Current (<5 s)

1 mA

1

1 k

50

18

2.5

1

2 mA

3 mA

10 mA

1

100

50

18

2.5

1

20 mA

50 mA

20 mA

1

50

50

18

2.5

1

40 mA

100 mA

50 mA

1

20

50

18

2.5

1

100 mA

200 mA

100 mA

1

10

50

18

2.5

2

200 mA

500 mA

200 mA

1

5

50

18

2.5

4

500 mA

1 A

500 mA

1

2

50

18

2.5

12

1 A

2 A

1 A

1

1

50

18

4.0

25

1.5 A

4 A

2 A

1

0.5

50

18

4.0

25

2.5 A

5 A

5 A

1

0.2

50

18

4.0

30

5.5 A

10 A

10 A

1

0.1

50

18

4.0

60

11 A

25 A

20 A

1

0.05

50

18

4.0

75

22 A

40 A

50 A

1

0.02

50

18

4.5

100

55 A

90 A

100 A

1

0.01

50

18

4.5

100

110 A

180 A

  • Remarks:

①: In the calibration temperature environment, the deviation of the measured resistance value from the nominal resistance value after the rated DC current is applied for ten minutes. Higher precision can be customized according to user requirements, such as: 20μΩ/Ω。

②: The initial deviation of the DC resistance value has included the power coefficient influence error under the nominal current. When measuring other non-nominal currents, additional measurement accuracy should be introduced. The calculation formula is:


Current

Inom

Max. AC/DC Diff. (ppm*FS)

Max. Phase Displacement (μrad)

50 Hz

1 kHz

100 kHz

53 Hz

400 Hz

1 kHz

10 kHz

50 kHz

100 kHz

1 mA

25

50

150

10

10

15

120

500

1000

10   mA

20

25

50

5

5

10

100

400

800

20   mA

20

25

50

5

5

10

100

400

800

50   mA

20

25

50

5

5

10

100

400

800

100   mA

20

25

25

5

5

10

60

300

500

200   mA

20

25

25

5

5

10

60

300

500

500   mA

20

25

25

5

5

10

60

300

500

1   A

20

25

30

5

5

10

60

300

500

2   A

20

30

50

10

10

15

110

500

1000

5   A

20

30

80

10

15

25

200

1000

2000

10   A

25

30

100

10

20

40

300

1500

3000

20   A

25

30

100

10

25

50

400

2000

4000

50   A

30

50

150

10

30

65

500

2500

5000

100   A

30

50

200

20

40

80

600

3000

6000

Remarks:   ③:   FS is full-scale value


Dimension and Weight

Model

Name

Dimension

(W × H × D, mm)

Weight (kg)

TH0400 – 1 mA

1 mA shunts

90 × 25 × 25

0.1

TH0400 – 10 mA

10 mA shunts

90 × 25 × 25

0.1

TH0400 – 20 mA

20 mA shunts

90 × 25 × 25

0.1

TH0400 – 50 mA

50 mA shunts

90 × 25 × 25

0.1

TH0400 - 100 mA

100 mA shunts

90 × 25 × 25

0.1

TH0400 – 200 mA

200 mA shunts

110 × 70 × 70

0.2

TH0400 - 500 mA

500 mA shunts

110 × 70 × 70

0.2

TH0400 – 1 A

1 A shunts

110 × 70 × 70

0.2

TH0400 - 2 A

2 A shunts

110 × 70 × 70

0.2

TH0400 – 5 A

5 A shunts

110 × 70 × 70

0.2

TH0400 - 10 A

10 A shunts

180 × 130 × 130

1

TH0400 – 20 A

20 A shunts

180 × 130 × 130

1

TH0400 - 50 A

50 A shunts

260 × 200 × 200

2.5

TH0400 – 100 A

100 A shunts

260 × 200 × 200

2.5

Remarks: Partial or full   purchases are available, particular requirements can be customized by resistance   and sampled voltage (e.g. 0.5 V and 0.8V).


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