Why IT8300 energy feedback electronic load can solve the common problem of electronic load

Electronic loads are often used in product design and production testing of power supplies or other electrical energy conversion equipment, including motor drives and inverters. Loads generally have two forms: a basic load composed of power resistors and an electronic load that uses active circuits to dynamically simulate load changes. Loads are often used in aging tests to determine early product failures, as an important part of production testing. Electronic loads are often integrated into automatic test systems. The test report is either stored locally or uploaded through a computer interface so that the test data can be further processed or used for archiving.

For most electronic loads, their common problem is to occupy space, consume a lot of electrical energy, and generate heat and noise. However, ITECH IT8300 energy feedback electronic load solves these problems. This article will focus on the typical problems that engineers are concerned about, especially those related to the advantages of IT8300 and the answers given by ITECH IT8300 manufacturers.

Q & As on IT8300

Engineers often ask many questions while investigating IT8300 technology, because its advantages are so significant that people can't believe it. We have compiled a list of typical questions and our answers:

Question 1: When using an energy-feedback electronic load, will the meter go back and sell electricity to the grid?

Answer: IT8300 fed back 95% of the electrical energy back to the AC grid in the plant. In most cases, the power returned from IT8300 is much smaller than the power consumption of the local distribution network. As shown in Figure 1. Therefore, the meter will not turn back, but it will obviously turn much slower.

Figure 1. IT8300 is usually a small part of the load of the entire power facility

Question 2: Can the IT8300 be connected to an independent DC power supply?

Answer: Yes, if there is an independent power supply in the factory, IT8300 can be connected to it, such as a generator, photovoltaic system or battery, and these DUTs do not absorb power from the grid. In this case, IT8300 is a net power supply to the grid.

Question 3: If the power grid is interrupted and the independent power source is still generating electricity, will the IT8300 transmit the power to the power grid, causing a safety accident?

Answer: No. IT8300 includes an automatic grid detection system, which detects phase voltage and frequency in real time for grid synchronization. If the grid is powered off, the IT8300 will also be powered off. This is called "island protection" and works the same as the grid-connected PV inverter. In this case, the IT8300 will simply shut down and wait for the operator to start it.

Question 4: IT8300 is more expensive than standard DC electronic loads. In addition to those obvious advantages, how can we balance the initial increased purchase cost?

Answer: The on-site installation test of IT8300 shows that it takes about two to three years to recover the initial investment of the machine purchase by reducing the electricity bill. Energy feedback electronic load provides a green test solution for power supply and energy conversion system. It feeds back up to 95% of electrical energy. The reliability of the IT8300 is very high, because the load dissipates a small amount of power per KW, and the IT8300 does not require many parallel MOSFETs or IGBTs as heat dissipators, so it has a longer life and lower maintenance costs.

Figure 2. IT8331 / IT8332 single machine can absorb 10.5KW. Up to ten units can be connected in parallel to absorb 105KW

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