
Protection
Relays
SKF Multilog On
-Line System IMx-M
2 - 31
User Manual
Behavior of Relay at Channel Startup
Table 2-7: Behavior of relay at channel startup.
Behavior of Relay at Channel Startup
Current
Operational
Mode
Relay Status
Channel Relay
on Relay Module
Slot Status Relay
on Protection Module
Normally
Energized
Normally De-
energized
Disarm
Circuit Fault
Configuration
update (slot
disarm
assumed)
Previous
triggered due to
reboot
Previous not
triggered due to
reboot
Triggered with a
short not triggered
due to reboot
Triggered
FW update (slot
disarm
assumed)
Previous
triggered due to
reboot
Previous not
triggered due to
reboot
Triggered with a
short not triggered
due to reboot
Triggered
Mains power
up*
Triggered due to
mains power off
Not triggered due to
mains power off
Previous not
triggered during
mains power off
Triggered
Protection
module hot
swap (slot
disarm
assumed)
Previous status
Previous status
Tri not
triggered during
module removal
Triggered
Relay module
hot swap (slot
disarm
assumed)
Triggered due to
relay module removal
Not triggered due to
relay module removal
Triggered
Triggered
*During reset or power down, all relays will be in non
-energized state.