Section 5
IED operation
5.1
Normal operation
In a normal protection relay use situation, the basic operation includes monitoring and
checking procedures.
•
Monitoring measured values
•
Checking object states
•
Checking function setting parameters
•
Checking events and alarms
All basic operations can be performed via the LHMI, WHMI or with PCM600.
For more information, see the PCM600 documentation.
5.2
Disturbance identification
Disturbances and their causes can be identified by indicator LEDs: Ready, Start and
Trip. During normal operation, the Ready LED is steady green.
Table 14:
Disturbance indications
LED
State
Description
Start LED
Yellow, steady
Protection started
Trip LED
Red, steady
Protection operated
Further actions to be taken to identify the disturbance:
•
Checking programmable LEDs
•
Reading event history
•
Checking fault records
•
Analyzing disturbance recordings
Document the disturbance before clearing the information from the
protection relay.
1MRS756509 E
Section 5
IED operation
630 series
61
Operation Manual