This picture shows a power transformer in an HV substation
Line Protection with GE relay
Hardware failure for CMC 356: Warning! The hardware self-test identified that the following current generators are out of tolerance or defective:
Current output / Group
The affected group will be disabled now. All generators of the non-affected groups can still be used.
Caution! Although the affected groups are disabled now they might carry dangerous currents! might carry dangerous currents!
If the problem persists it is highly recommended to send in the test set for repair. Online operation is enabled anyhow.
Areva or Schneider Electric relays in a cubicle
Substation Automation system and SEL relays in a substation
Microelecttrica sciendtifica Milano Italia
Philosophy of good relay protection settings for machines and plants – on photo: ABB Protection relay REF 542 Plus
SIEMENS SIPROTEC 4 Relay
SIEMENS SIPROTEC 5 Relay
Online SIEMENS SIPROTEC 5 relay
SIGRA 4 needs a serial number to activate; you can register your DIGSIwith a valid serial number along with SIGRA 4 software