ABB REX610 - Section 5 Protection Relay Operation; Normal Operation Procedures; Disturbance Identification

Section 5 Protection relay 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 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 15: Disturbance indications
LED
State Description
Start LED Yellow, steady Protection started
Trip LED Red, steady Protection operated
Ready LED Green, flashing Internal fault
Further actions to be taken to identify the disturbance:
• Checking programmable LEDs
• Reading event history
• Analyzing disturbance recordings
Document the disturbance before clearing the information from the
protection relay.
2NGA000823 A Section 5
Protection relay operation
REX610 39
Operation Manual