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Comparative Analysis of AMT105, AMT205, AMT103, and AMT203 Devices

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In this video, we’ll carry out a comparative analysis of the hardware features of several models from Vebco’s product line

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Voltage Sources

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Starting with the AMT105, this device is equipped with two voltage groups

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one three-phase group rated at 150 volts, and one single-phase group also rated at 150 volts.

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In total, it provides four 150-volt sources, each capable of delivering up to 500 milliamps per phase

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The minimum sampling rate for measuring real-time values in this device is 1.2 milliseconds.

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This applies both to the applied voltage and the drawn current, ensuring accurate and timely data acquisition.

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Additionally, the AMT105 includes an independent DC voltage source with a maximum output of 212 volts.

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This DC source operates separately from the other voltage outputs, allowing for greater flexibility in various testing scenarios.

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In contrast, the AMT205 device offers two groups of three-phase 300-volt voltage outputs

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each with a maximum amplitude of 1.2 amperes. The sampling rate for measuring actual values is at least 25 microseconds

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which applies to both the supplied voltage and the drawn current. These voltage sources

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can be converted into 1.2-ampere current sources, capable of providing up to 300 volts of electrical potential for current injection

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This feature enables the device to inject extremely small currents — as low as 20 microamperes — with high precision

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The device does not include a separate DC source, so if a DC source is required

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, the user must dedicate one of the six available phases to that purpose.

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Current Sources

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The AMT105 device includes two groups of 32-ampere current outputs

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each capable of supplying 12 volts per phase. The sampling rate for measuring the actual values from these sources is at least 1.2 milliseconds,

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and it is used to monitor the drawn current.

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In contrast, the AMT205 device includes two groups of 32-ampere current outputs

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each capable of supplying 22 volts per phase. The sampling rate for measuring actual values

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values from these sources is at least 25 microseconds, and is used to monitor both the injected current and the voltage supplied by the device

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These current sources can be converted into 22-volt voltage sources with a maximum current of 32 amperes.

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This feature allows the device to apply very small voltages — as low as 40 microvolts — with high precision.

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The Neutrik port on the AMT105 device provides three-phase voltage and three-phase current outputs

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 for use in impedance and directional testing. It can also

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be reconfigured into six current phases for differential testing.

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However, on the AMT205 device, the Neutrik port provides only three-phase voltage

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and three-phase current outputs for impedance and directional testing, and does not support reconfiguration.

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The AMT105 device includes eight binary/analog inputs, which can operate in either DRY (binary) mode

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 or WET (analog) mode. In analog mode, the device supports three input voltage ranges: 4.5 volts, 30 volts, and 188 volts.

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The sampling rate for measuring values can be selected starting from 400 microseconds

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and higher. Naturally, as the measurement range increases, the accuracy tends to decrease.

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The AMT205 device also features eight binary inputs, which can operate in both DRY (binary) and WET (analog)modes

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. However, unlike the AMT105, in addition to the 4.5-volt

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30-volt, and 188-volt ranges, it also includes a 500-volt range.

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The sampling rate for measuring values can be selected from 12.5 microseconds and above.

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As expected, when the measurement range increases, the accuracy of the measurement tends to decrease

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The AMT105 device includes two AC/DC analog inputs: one dedicated solely to current measurement, with a maximum range of 750 milliamperes,

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and the other dedicated to voltage measurement, with a maximum range of 400 millivolts.

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The sampling rate for measuring values can be selected from 400 microseconds and above.

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The AMT205 device also includes two AC/DC analog inputs, but with extended capabilities

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For current measurement, it offers four selectable ranges: 250 microamperes, 39 milliamperes

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, 750 milliamperes, and 10 amperes

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. For voltage measurement, it provides four ranges as well

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10 millivolts, 50 millivolts, 120 millivolts, and 400 millivolts.

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The sampling rate for measuring values can be selected from 12.5 microseconds and above.

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These inputs offer higher precision, especially when measuring smaller signals.

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The AMT105 device features four binary outputs with relay switches

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, where neither the switch type nor current measurement can be changed.

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In contrast, the AMT205 device also includes four binary outputs

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, but with the option to select between transistor-types and relay-type switches. The relay type offers higher current capacity

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but has a slower switching speed, while the transistor type provides very high switching speed but can handle lower current levels

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A key advantage of the AMT205 is that its binary outputs

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can measure current, a capability not available in the AMT105.

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The AMT205 device can be connected to a laptop via both LAN and Wi-Fi. Thanks to its support for IEC 61850 testing

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the device is equipped with three LAN ports, which can be used to create a ring connection between the device and two other IED systems.

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The AMT105 device also supports connection via LAN and Wi-Fi, but it does not support

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IEC 61850 testing and includes only one LAN port.

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The AMT103 device shares the same technical specifications as the AMT105

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, with a few key differences: it includes four 150-volt voltage sources

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and three 32-ampere current sources, and it does not have an independent DC source.

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The number of binary/analog inputs has been reduced from 8 to 4

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, and on the Neutrik port, the number of voltage and current sources is fixed at three voltage outputs and three current outputs.

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The AMT203 device shares the same technical specifications as the AMT205

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with a few key differences: it includes four 300-volt voltage sources

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and three 32-ampere current sources. Additionally, the number of binary/analog inputs

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has been reduced from 8 to 4.

