Lightning protection circuit and lightning protection method for direct-current power supply port of communication equipment
A technology of lightning protection circuit and lightning protection circuit, which is applied in the direction of emergency protection circuit device, emergency protection circuit device, circuit device, etc. for limiting overcurrent/overvoltage, and can solve the problem of high residual voltage and long residual voltage maintenance time , the circuit and components are difficult to be compatible, and the scope of application is single, so as to reduce the risk of lightning damage, wide application range, and small circuit components.
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[0034] The present invention will be further described in detail below in conjunction with the drawings and embodiments.
[0035] See figure 1 As shown, the lightning protection circuit for the DC power port of the communication device in the embodiment of the present invention includes a differential-mode first-level lightning protection circuit, a decoupling network, a differential-mode second-level lightning protection circuit, and a common-mode lightning protection circuit .
[0036] The input end of the DC power supply of communication equipment is connected to the output end of the power supply through a differential mode first-level lightning protection circuit, a decoupling network, and a differential mode second-level lightning protection circuit. The input end of a communication equipment DC power supply is connected through a common mode lightning protection circuit Connect to the protective ground PE.
[0037] The differential mode first-level lightning protection circu...
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