The figure below shows an anti-surge current circuit composed of a thyristor V and a current limiting resistor R1. At the moment when the power is turned on, the input voltage charges the capacitor C through the rectifier bridges (D1 to D4) and the current limiting resistor R1 to limit the inrush current. When capacitor C is charged to approximately 80% of the rated voltage, the inverter operates normally. The trigger signal of the thyristor is generated by the auxiliary winding of the main transformer, the thyristor is turned on and the current limiting resistor R1 is short-circuited, and the switching power supply is in a normal running state.
Figure 3 replaces the RC delay circuit
According to the classification of the shape, Telephone Cable have Round Telephone Cable and flat telephone cable.
The common specification of flat telephone cable has two core and four core, the wire diameter has 0.4 and 0.5 respectively, some areas have 0.8 and 1.0.In addition to the two and four cores, there are four, six, eight, and ten cores.
If the general family is the local telephone use mode, 2 chip is enough to use.If the telephone is used by a company or part of a group, it is recommended to use a 4-cell line in consideration of the need for telephone broadband, and a 6-cell line is recommended if a digital telephone is used.
Flat Telephone Cable,Flat Phone Cable,Telephone Flat Cable,Field Telephone Cable
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