I would like to ask about the working principle of ''terminal blocks with fuses''
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1. Is there a difference between correct and reverse connection of the terminal blocks? 2. What are the specific functions of the diodes and resistors inside? When the fuse is not connected, the terminals above are connected in series (the fuse and diode are connected to the terminal)
Resistors and diodes serve to provide freewheeling, preventing inrush current from burning out the fuse when the circuit is turned on.
Can the wires be connected arbitrarily on either side of that terminal? What does \"free-wheeling\" even mean?
It doesn’t matter whether the terminals are connected in reverse; a short circuit at the installation site can cause the fuse to blow. When the diode lights up, it indicates that the fuse has been damaged, signaling the need to replace it. When the site is operating normally, a fuse is connected in series with the circuit to form a loop, ensuring power supply at the site.
The light-emitting diodes on the terminals still have positive and negative poles, so it is necessary to consider which side is positive and which is negative when making connections.