Time-delay relay reduces inrush current


Posted on Mar 13, 2013

In contrast, the circuit in Figure 1 physically inserts a resistor in series with the load to limit the inrush current and then short-circuits the resistor after a time delay. You can adapt the circuit to any size load by suitably selecting the series resistor and the relay-contact rating.



The steady-state dc-current requirement of the relay coil determines the values of the other circuit components. You select capacitor C2 such that the average value of the rectified current, IAVE, is equal to the current the relay coil requires. The coil




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Temperature Control switch
tr switch
27mhz transmitter circuit
LM3552 white LED driver circuit design
Solar-Powered High Efficiency Battery Charger
Simulator Test Tools Speed Circuit Design
Two Simple Crystal Test Circuits



Top