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TK4800 Calibration Device for Portable Tester for EV Chargers

TK4800 is a set of devices dedicated to calibrating portable tester for DC EV chargers and portable tester for AC EV chargers. The device is designed based on the dynamic characteristics of new energy vehicle charging. It supports two modes: steady-state electric energy measurement (for constant load) and dynamic electric energy measurement (for fluctuating loads).

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Model:
TK4800
Brand:
TUNKIA

* This picture is for reference only. The configuration and details may vary depending on the application scenario.

1. Summary

Steady-state electric energy measurement mode tests the calibrator by pulse method or accumulated electric energy method under constant voltage and current.

Dynamic electric energy measurement mode is specially used to simulate the dynamic process of electric vehicle charging. It can output dynamic waveforms such as adjustable trapezoidal waves and staircase waves to test the accuracy of the calibrator's accumulated electric energy under dynamic waveforms. It can more realistically reflect the actual working scenario of the calibrator.

The device comes with a standard AC and DC charging interface, and with automatic test software, it can automatically complete the calibration of the EV charger in two modes: steady-state and dynamic.

2. Applications

2.1 Steady-state Electric Energy Measurement

2.2 Dynamic Electric Energy Measurement

• Dynamic waveform rise time tup , fall time tdown , duration t0 , power p, etc. can be customized.

• Dynamic waveform output and energy measurement can be performed in the mode of constant voltage, constant current or simultaneous changes of voltage and current.

3. Features

• High accuracy measurement: The steady-state electric energy measurement accuracy of the device reaches class 0.01, and the dynamic electric energy measurement accuracy reaches class 0.02.

• Wide range: DC output 100 V ~ 1150 V, 0.1 A ~ 300 A, AC output 220 V ± 20%, 10 mA ~ 80 A.

• Ms level power refresh: The DC power accumulation register update rate reaches 10ms/time, and the AC power accumulation register update rate reaches 20ms/time, improving the measurement accuracy of accumulated power under dynamic waveforms.

• Tip measurement: The electric energy measurement point of the device is set at the charging gun head (side of the pile), and the wire resistance of the charging gun wire is compensated to ensure that it matches the calibrator and charger measurement point.

• Special calibration charging gun cables for calibrator: It is equipped with a China national standard DC charging gun cable and a China national standard AC charging gun cable, which can be directly connected to the portable testers for AC and DC chargers for calibration without the extra connections.

• Supports simultaneous calibration of portable tester for DC EV charger and portable tester for AC EV charger to improve efficiency.

• Current channel switching: The DC current channel of the device supports switching between the charging head DC+ and the charging head DC-, which can be used to calibrate the charger tester with the current sampling located at DC+ and the charger tester with the current sampling located at DC- respectively.

• Equipped with conventional standard meter terminals, it can also perform calibration work on conventional AC and DC standard energy meters.

• Equipped with a large LCD touch screen, which can be used to observe or control output.

• Equipped with automatic test software for portable tester for AC DC EV chargers.

4. Technical Specifications

4.1 DC

4.1.1 DC Voltage/Current

Type	Range	Resolution	Measurement Uncertainty ( ppmRD+ppmRG) (k=2)	Temperature Coefficient @ (15~30)°C (ppmRD+ppmRG) /°C
DC voltage	300 V	0.1 mV	30 + 20	0.25 + 0.25
	750 V	0.1 mV	30 + 20	0.25 + 0.25
	1000 V	1 mV	30 + 20	0.25 + 0.25
DC current	1 A	1 μA	30 + 20	0.25 + 0.25
	2 A	1 μA	30 + 20	0.25 + 0.25
	5 A	1 μA	30 + 20	0.25 + 0.25
	10 A	10 μA	30 + 20	0.25 + 0.25
	20 A	10 μA	30 + 20	0.25 + 0.25
	50 A	10 μA	30 + 20	0.25 + 0.25
	100 A	0.1 mA	30 + 20	0.25 + 0.25
	250 A	0.1 mA	30 + 20	0.25 + 0.25
Note [1]:RD is the reading value, RG is the range value, the same below

• Voltage output/measurement range:100 V～1150 V, 7 digit display

• Current output/measuring range: 0.1 A～300 A, 7 digit display

• Voltage output maximum load capacity: 20 VA, Current output maximum load capacity:750 VA

• Protection functions: voltage short circuit protection, current open circuit protection, overload protection

4.1.2 DC Power/Energy

Output/Measurement	Voltage Range	Current Range	Measurement Uncertainty (k=2)
			Steady-state	Dynamic
Power/Energy measurement	100 V～1150 V	10 A ≤ I ≤ 300 A	0.01%*RD	0.02%*RD
		1 A ≤ I < 10 A	0.01%*RD	0.05%*RD

• Output power stability: 0.01% / 2min；

• Real-time display of standard accumulated electric energy;

• Standard electric energy pulse output: high-frequency full-scale value corresponds to 60 kHz, low-frequency full-scale value corresponds to 6 Hz;

• Pulse output frequency; Output frequency jitter time <10 μs

• Standard power pulse input; signal amplitude is 5 V, TTL level;

• Can receive high-frequency pulses ≤150 kHz;

• Electric energy error display: automatic display, resolution is 0.0001%

4.2 AC

4.2.1 Three-phase voltage/current

Type	Range	Resolution	Measurement Uncertainty ( ppmRD+ppmRG) (k=2)	Temperature Coefficient @ (15~30)°C (ppmRD+ppmRG) /°C
Three-phase voltage	220 V	0.1 mV	30 + 20	0.25 + 0.25
Three-phase current	100 mA	0.1 μA	60+ 40	0.25 + 0.25
	200 mA	0.1 μA	60+ 40	0.25 + 0.25
	500 mA	0.1 μA	30 + 20	0.25 + 0.25
	1 A	1 μA	30 + 20	0.25 + 0.25
	2 A	1 μA	30 + 20	0.25 + 0.25
	5 A	1 μA	30 + 20	0.25 + 0.25
	10 A	10 μA	30 + 20	0.25 + 0.25
	20 A	10 μA	30 + 20	0.25 + 0.25
	60 A	10 μA	30 + 20	0.25 + 0.25

• Voltage output/measurement range: 220 V ± 20% (phase voltage), 7-digit display

• Current output/measurement range: 10 mA～80 A, 7-digit display

• Voltage symmetry ≤ 0.2%, current symmetry ≤ 0.5%, phase symmetry ≤ 0.2°;

• Maximum load capacity of voltage output: 20 VA/phase, maximum load capacity of current output: 60 VA/phase

• Protection functions: voltage short circuit protection, current open circuit protection, overload protection

4.2.2 Frequency/Phase

Type	Adjustment Range	Optimal Measurement Ucertainty (k=2)
Frequency	45.000 00 Hz～65.000 00 Hz	50 ppm*RD
Phase	0.000 0°～359.999 9°	0.003°

4.2.3 Power/Energy（45Hz ≤ F ≤ 65Hz）

Output/ Measurement	Voltage Range	Current Range	Power Fctor	Measurement Uncertainty (k=2)
				Steady-state	Dynamic
Power/Energy	220 V±20%	1 A ≤ I ≤ 78 A	1	0.01%*RD	0.02%*RD
		10 mA ≤ I < 1 A	1	0.01%*RD	0.05%*RD