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INSTANTANEOUS AUXILIARY RELAYS
Monostable and Bistable Instantaneous auxiliary relays
![](../images/relays/rag.png)
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).
![](../images/relays/rade.png)
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 | |
---|---|---|---|---|
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RAG 1020 RAG 2040 RAG 3080 RAG 4160 |
STATIC | 3, 74 | Monostable instantaneous relay with 2, 4, 8 and 16 change over output contacts |
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TAA 7010 TAA 7020 TAA 7030 TAA 7040 |
STATIC | 3, 74 | Monostable instantaneous relay with multiple independent auxiliary units in modular case R type |
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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 |