CHROMA 63804 PDF

This unique feature provides real world simulation capabilities and prevents overstressing the instrument resulting in reliable and unbiased test results. Available comprehensive measurements allow users to monitor the output performance of the UUT. Built-in digital outputs may also be used to control external relays for short circuit crowbar testing. Each are described below.

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The Chroma Loads can simulate load conditions under high crest factor and varying power factors with real time compensation even when the voltage waveform is distorted. This special feature provides real world simulation capability and prevents overstressing thereby giving reliable and unbiased test results.

Comprehensive measurements allow users to monitor the output performance of the UUT. Built-in digital outputs may also be used to control external relays for short circuit crowbar testing. Each are described below. For CR mode the PF is always set to 1. The power factor range is limited based on crest factor programmed Shown as Figure 1. If the programmed PF is positive then the current will lead the voltage waveform and when PF is set negative, the current will lag the voltage waveform.

See below Figure 1: Crest Factor vs. Figure 2 shows the typical model of a rectifier input. The waveform obtained under CC mode with the same loading crest factor shown in Figure 5. Figure 2 : Typical Rectified Circuit For inrush current simulation See Figure 6 , the provides an Inrush Current mode that allows the user to set different inrush current amplitude and voltage phase angle where the inrush current started.

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