Electronic loads are commonly used in product design and production testing of power supplies or other power conversion equipment, including motor drives and inverters. There are two general types of loads: basic loads consisting of power resistors and electronic loads that use 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 automated test systems. The test report is either uploaded locally or via a computer interface so that the test data can be further processed or archived.
For most electronic loads, their common problem is to occupy space, consume a lot of power, generate heat and noise. However, the IT8300 energy feedback electronic load of the ITECH solves these problems. This article will focus on the typical issues that engineers are concerned about, especially the IT8300 advantages and the answers given by the IT8300 Itex manufacturer.
Q&As on IT8300
Engineers often ask many questions while investigating the IT8300 technology, because its advantages are so obvious that people can't believe it. We have compiled a list of typical questions and our answers:
Question 1: With the energy feedback electronic load, the meter will go back and sell electricity to the grid?
Answer: IT8300 feedbacks 95% of the energy back to the factory AC grid. In most cases, the energy fed back from the IT8300 is much smaller than the power consumption of the local distribution network. As shown in Figure 1. Therefore, the meter will not go back, but it will obviously turn much slower.
Figure 1. The IT8300 is usually a small part of the overall power plant load.
Question 2: Can the IT8300 be connected to a stand-alone DC power supply?
Answer: Yes, if the plant has a separate power supply, the IT8300 can be connected to it, such as generators, photovoltaic systems, or batteries, which do not absorb power from the grid. In this case, IT8300 is a net supply to the grid.
Question 3: If the power grid is interrupted, the independent power supply is still generating electricity. Will the IT8300 transmit power to the grid and cause a safety incident?
Answer: No. The IT8300 includes an automatic grid detection system that detects phase voltages and frequencies in real time for grid synchronization. If the grid loses power, the IT8300 will also lose power. This is the "island protection", which works in the same way as a grid-connected PV inverter. The IT8300 will simply shut down in this case and wait for the operator to start it.
Question 4: IT8300 is more expensive than a standard DC electronic load. Apart from those obvious advantages, how can we balance the initial increase in purchase cost?
Answer: The on-site installation test of the IT8300 shows that it takes about two to three years to recover the initial purchase investment by reducing the electricity bill. Energy-feedback electronic loads provide a green test scheme for power and energy conversion systems. It feeds back up to 95% of the electrical energy. The reliability of the IT8300 is very high, because the load to be measured power, consuming very little power per KW, IT8300 does not require a lot of parallel MOSFET or IGBT as a heat dissipator, so the longer life, lower maintenance costs.
Figure 2, IT8331/IT8332 stand-alone can absorb 10.5KW. Up to 10 units can be connected in parallel to absorb 105KW
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