Can universal relays replace coils?

Update:20-12-2019
Summary:

A universal relay is a relay that can be used universal […]

A universal relay is a relay that can be used universally in a certain field or in many fields. A relay is an electrical appliance that causes a predetermined step change in a controlled quantity in an electrical output circuit when a change in an input quantity (excitation quantity) reaches a prescribed requirement. According to the principle, it is judged that the universal relay can replace coils of different properties, and thus it can be made into various relays. The relay is a combination of multiple high-quality sealed small relays with low coil voltage, which is moisture-proof, dust-proof, continuous line, and high reliability.
Other relay coil characteristics

Voltage relay: The relay related to the action of the contact and the coil's operating voltage is called a voltage relay. It is used for voltage protection and control of the electric drag system. When used, the coil of the voltage relay is connected in parallel with the load.
Features: The coil has a large number of turns and a small wire diameter.
Classification: According to the type of coil current, it can be divided into AC and DC voltage relays. According to the pull-in voltage, it can be divided into overvoltage, undervoltage and zero voltage relays.

Current relay: The relay related to the movement of the contact and the current of the coil is called a current relay. When in use, the coil of the current relay is connected in series with the load.
Features: The number of turns of the coil is small and thick.
Classification: According to the type of coil current, it can be divided into AC and DC current relays. According to the magnitude of the pull-in current, it can be divided into over-current and low-current relays.