Just 2 safety and practical considerations:
1.) The circuit above would likely need 2 additional fuses going to the control ladder. The top 3 are sized for the motor load and wiring. The 2 additional would be sized for the relay and contactor coil loads and the smaller control wiring.
2.)TDRs that delay release tend to be very expensive (and large) vacuum Agastats. It would be more practical to use one of the 11 pin octal style relays purpose built or switchable to delay release. In that case, pins 2 and 10 would be across the ladder and and the CR1 contact would go to the control pins of TDO.
Joe
