Several other phase sequence discriminator circuits a
Source: InternetPublisher:傻阿乐 Keywords: BSP light emitting diode power supply Updated: 2021/08/29
For places where there is no neutral line at the power supply , the phase sequence discriminator shown in Figure 3-91 (a), (b), (c), and (d) can be used.
In Figure 3-91 (a), the neon bulb in Figure 3-90 is replaced by a light-emitting diode , which solves the problem that the neon bulb is easy to burn out after long-term operation.
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