RELAY LOCKING CONTROL CIRCUIT USING THE TDR RELAY TIMER 

RELAY LOCKING CONTROL CIRCUIT USING TDR RELAY TIMER is almost the same as the contactor lock. the equation is paired in NO Relay. and the function of the TDR Relay is only to trigger the 220 VAC Relay so that it works and is locked. and the timer relay will turn off, thus making the timer relay durable.
In this video it also explains how to assemble a locking relay step by step, until beginners can actually assemble the wiring.
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