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Auto-coupling step-down starting circuit that can effectively ensure that the main contact of the contactor is extinguished
Source: InternetPublisher:国民男神经 Keywords: Contacts starting circuit BSP intermediate relay Updated: 2020/04/30
The circuit is shown in Figure 3-56. It has two starting modes: manual and automatic. There are two intermediate relays
KA2 and KA3 in the control loop . In this way, after cutting off KM! and before switching on KMz,
a time interval is provided to ensure arc extinguishing after the main contact of KMi is disconnected, that is,
the main contact of KMz can be closed only after the main contact of KMi is extinguished.
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