Instantaneous monostable relays (RAG and TAA) are used as auxiliary relays linked with protection relays where it is necessary to multiply control contacts. This is also particularly true in control/command and automatic switching schemes which require a large number of repeated contacts. (es. change over schemes, automatic transfer and all automation applications).

Instantaneous bistable relays (RADE type) are mainly used as contact multipliers in control systems, where two different stable positions are required, i.e.: YES/NO, OPEN/CLOSED, AUTOMATIC/MANUAL, etc…
Other important uses are:
» electrical or hand reset tripping relays [86]
» remote control relay.

	Device	Tecnology	ANSI	Description
	RAG 1020 RAG 2040 RAG 3080 RAG 4160	STATIC	3, 74	Monostable instantaneous relay with 2, 4, 8 and 16 change over output contacts
	TAA 7010 TAA 7020 TAA 7030 TAA 7040	STATIC	3, 74	Monostable instantaneous relay with multiple independent auxiliary units in modular case R type
	RADE 2030 RADE 2040 RADE 3080 RADE 4160	STATIC	3, 74, 86	Bistable auxiliary relay with 3, 4, 8 and 16 change over output contacts