Description - Reyrolle 7SR42 Duobias

Transformer Differential

The 7SR242 is used as a protection, control and monitoring relay for two winding transformers of all vector groups, primary configurations/connections and earthing connections.

The relay functionality also allows its application in auto-transformer and reactor protection schemes.

Relays are housed in size E8 or E10 cases. Integrated logic is provided to allow the optimal configuration of relay functionality with the relays analogue inputs and binary input/output circuits.

Protection, control, instrumentation and metering functionality is accessible via data comms channel(s). A front USB port for local PC connection or rear electrical RS485 port for remote connection are provided. Additional rear port options are available.

Product homepage - downloads in the internet (catalogs, certificates, firmware, manuals)

https://www.siemens.com/reyrolle