PHASE COMPENSATION When the HPF in the current channel is disabled, the phase error between the current channel (IA, IB, or IC) and the corresponding voltage channel (VA, VB, or VC) is negligible. When the HPF is enabled, the current channels have phase response (see Figure 53 through Figure 55). The phase response is almost 0 from 45 Hz to 1 kHz. The frequency band is sufficient for the requirements of typical energy measurement applications. However, despite being internally phase compensated, the ADE7758 must work with transducers that may have inherent phase errors. For example, a current transformer (CT) with a phase error of 0.1° to 0.3° is not uncommon. These phase errors can vary from part to part, and they must be corrected to perform accurate power calculations. 전류 채널의 HPF가 비활성화일 때, 전류 채널(IA, IB, IC)와 통신 전압 채널(VA, VB, BC)사이의 상 오차값은 무시할 수 있을 정도로 작다. HPF가 활성상태일 때, 전류 채널은 상 응답을 가진다. 상 응답은 45Hz에서 1kHz까지 대부분 0값이다. 주파수 대역은 전형적인 에너지 측정 응용의 요구 사항에 대해 충분한 값이다. 그러나, 내부적