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TH0420 Reference Coaxial Current Shunt

TH0420 is a precision coaxial shunt with ultra-low power coefficients. Each set contains a total of 10 different current range specifications and can convert nominal current from 0.1 A to 100 A to nominal voltage output of 1 V or 0.5 V.
TH0420 has a very low power coefficient, such as TH0420-100A even under 100 W power conditions, its power coefficient is not more than 10 PPM, very suitable for a wide range of AC and DC current rapid measurement.

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Model:
TH0420
Brand:
TUNKIA

TH0420 Reference Coaxial Current Shunt

1. Summary

TH0420 is a precision coaxial shunt with ultra-low power coefficients. Each set contains a total of 10 different current range specifications and can convert nominal current from 100m A to 100 A to nominal voltage output of 1 V or 0.5 V.

TH0420 has a very low power coefficient, such as TH0420-100A even under 100 W power conditions, its power coefficient is not more than 10 PPM, very suitable for a wide range of AC and DC current rapid measurement.

2. Features

• Operating frequency: DC ~ 100 kHz

• Nominal input current: 0.1A ~ 100A (wider range can be customized)

• Nominal output voltage is 1 V or 0.5 V

• Annual variation: typical value is 5 ppm, maximum value is 16 ppm.

• Ultra low power factor

• Can withstand the instantaneous current impact

3. Applications

☆ Build Wide Frequency Current Measurement System

TH0420 Build Wide Frequency Current Measurement System

Set up wideband power/energy precision measurement system with high frequency V/V conversion standard and TH2000 vector voltage analyzer, measure wideband power/energy signal, calibrate wideband power source, wideband power meter, power analyzer and other equipment.

☆ Build Wide Frequency Power/Energy Precision Measurement System

TH0420 Build Wide Frequency Power/Energy Precision Measurement System

☆ Build Wide Frequency Transformer/Sensor Calibration System

TH0420 Build Wide Frequency Transformer/Sensor Calibration System

Set up a wideband transformer/sensor measurement system with wideband constant-current source and wideband sensor tester (such as TH2000 vector voltage analyzer) to calibrate the tested transformer or sensor with nominal current ≤ 500 A.

☆ Build Wide Frequency Transformer/Sensor Calibration System

TH0420 Build Wide Frequency Transformer/Sensor Calibration System

For the calibration of transformer/sensor whose nominal current is greater than 500 A, TH0420 is used as the standard and the secondary signal I/V converter of the equipment under inspection, and a wideband transformer/sensor measurement system is established with a wideband constant current source and a wideband sensor tester (such as TH2000 vector voltage analyzer).

4. Specifications

4.1 Resistance Specification

Specification	Nominal resistance ( Ω )	Initial deviation^[1] (±μΩ/Ω ) @ (23±1)°C	Annual Stability ( ±μΩ/Ω )	Temperature coefficient ( ppm/K )	Power factor^[2] ( ±ppm/Rated power )
TH0420-0.1A	10	30	12	2.0	1
TH0420-0.2A	5	30	12	2.0	1
TH0420-0.5A	2	30	12	2.0	2
TH0420-1A	1	30	12	2.0	3
TH0420-2A	0.5	30	12	2.5	5
TH0420-5A	0.2	30	12	2.5	5
TH0420-10A	0.1	30	12	2.5	5
TH0420-20A	0.05	30	12	2.5	8
TH0420-50A	0.02	30	12	3.0	10
TH0420-100A	0.01	30	12	3.0	10
Note [1]: The initial deviation is the maximum offset of the resistance under DC condition, usually the manufacturer's guaranteed value; Higher precision can be customized according to user requirements, such as 20 μΩ/Ω. Note [2]: When the coaxial shunt is used to measure DCI, the resistance's own heat will lead to the change of resistance value under different input currents, thus introducing the error. The calculation formula is as follows: γ= power coefficient × [1-(current measurement/nominal current value)^2]

4.2 Current Measurement

Specification	Nominal input current ( A )	Nominal Output current ( V )	AC/DC difference[3] ( k=2,±ppm )
			53 Hz	1 kHz		10 kHz		100 kHz
TH0420-0.1A	0.1	1	20		25		25	25
TH0420-0.2A	0.2	1	20		25		25	25
TH0420-0.5A	0.5	1	20		25		25	25
TH0420-1A	1	1	20		25		25	30
TH0420-2A	2	1	20		30		35	50
TH0420-5A	5	1	20		30		50	80
TH0420-10A	10	1	20		30		50	100
TH0420-20A	20	1	20		30		50	100
TH0420-50A	50	1	30		50		80	150
TH0420-100A	100	1	30		50		100	200
Note [3]: The measured value of AC current should be calculated according to the following formula, and the unit of the difference between AC and DC is ppm: Ac current measurement value =(voltage measurement value/calibration resistance value)×(1+ AC-DC difference /(1 000 000))

Specification	Maximum current( A )	Instantaneous current (<5s)	Specification	Maximum operating current( A )	Instantaneous current (<5s)
TH0420-0.1A	0.2 A	1.5 A	TH0420-5A	5.5 A	20 A
TH0420-0.2A	0.5 A	2 A	TH0420-10A	11 A	30 A
TH0420-0.5A	1 A	3 A	TH0420-20A	22 A	50 A
TH0420-1A	1.5 A	4 A	TH0420-50A	55 A	100 A
TH0420-2A	2.5 A	6 A	TH0420-100A	110 A	200 A

4.3 Phase Displacement

Specification	Phase Displacement ( k=2, ± μrad )
Specification	53 Hz	400 Hz	1 kHz	10 kHz	50 kHz	100 kHz
TH0420-0.1A	5	5	10	30	150	300
TH0420-0.2A	5	5	10	30	150	300
TH0420-0.5A	5	5	10	30	150	300
TH0420-1A	5	5	10	30	150	300
TH0420-2A	10	10	15	50	300	600
TH0420-5A	10	15	25	100	500	1200
TH0420-10A	10	20	40	150	800	1600
TH0420-20A	10	25	50	200	1000	2000
TH0420-50A	10	30	65	300	1500	3000
TH0420-100A	20	40	80	400	2000	4000

5. General Specifications

Power supply

——

Temperature performance

Operating temperature: 13°C ~ 33°C;

Calibration temperature: 18°C~28°C;

Storage temperature: 5°C to 45 °C

Note: When stored in a harsh temperature environment, the resistance value may change temporarily and be restored to the original resistance value within the following 30 days.

Humidity performance

Operating humidity: < 50% R·H

Storage humidity :(15%~80%) R·H, no condensation

6. Ordering Information

	Specification	Nominal current
	TH0420-0.1A	0.1 A
	TH0420-0.2A	0.2 A
	TH0420-0.5A	0.5 A
	TH0420-1A	1 A
	TH0420-2A	2 A
	TH0420-5A	5 A
	TH0420-10A	10 A
	TH0420-20A	20 A
	TH0420-50A	50 A
	TH0420-100A	100 A