DC-14 economy resistors in the circuit

What is "economy resistors" in the following IEC Utilization Category description?
How is this resistor connected to the load?
Which rating?

DC-14 Control of D.C. electromagnetic loads having economy resistors in the circuit

http://www.eecontrols.com/documents/Pages21-30.pdf

https://www.electrotechnik.net/2012/05/economy-resistor-in-dc-coils.html

"to limit the current after the contactor has operated, a series resistance is connected. This is known as the economy resistor. The economy resistor enables the design of contactors which can draw heavy initial current and less holding current (resulting in lower power consumption during normal operation). "

This may help you out.
Regards,