ABB Relion 670 Series Applications Manual page 462

Section 17
Monitoring
tLevelLockOut : This is used to set the time delay for a level lockout indication, given in s.
tTempAlarm : This is used to set the time delay for a temperature alarm indication, given in s.
tTempLockOut : This is used to set the time delay for a temperature lockout indication, given in s.
tResetLevelAlm : This is used for the level alarm indication to reset after a set time delay in s.
tResetLevelLO : This is used for the level lockout indication to reset after a set time delay in s.
tResetTempLO : This is used for the temperature lockout indication to reset after a set time delay
in s.
tResetTempAlm : This is used for the temperature alarm indication to reset after a set time delay in
s.
17.4 Breaker monitoring SSCBR
17.4.1 Identification
Function description
Breaker monitoring
17.4.2 Application
The circuit breaker maintenance is usually based on regular time intervals or the number of
operations performed. This has some disadvantages because there could be a number of
abnormal operations or few operations with high-level currents within the predetermined
maintenance interval. Hence, condition-based maintenance scheduling is an optimum solution in
assessing the condition of circuit breakers.
Circuit breaker contact travel time
Auxiliary contacts provide information about the mechanical operation, opening time and closing
time of a breaker. Detecting an excessive traveling time is essential to indicate the need for
maintenance of the circuit breaker mechanism. The excessive travel time can be due to problems
in the driving mechanism or failures of the contacts.
Circuit breaker status
Monitoring the breaker status ensures proper functioning of the features within the protection
relay such as breaker control, breaker failure and autoreclosing. The breaker status is monitored
using breaker auxiliary contacts. The breaker status is indicated by the binary outputs. These
signals indicate whether the circuit breaker is in an open, closed or error state.
Remaining life of circuit breaker
Every time the breaker operates, the circuit breaker life reduces due to wear. The wear in a breaker
depends on the interrupted current. For breaker maintenance or replacement at the right time, the
remaining life of the breaker must be estimated. The remaining life of a breaker can be estimated
using the maintenance curve provided by the circuit breaker manufacturer.
456
IEC 61850
identification
SSCBR
© Copyright 2017 ABB. All rights reserved
IEC 60617 ANSI/IEEE C37.2
identification device number
- -
1MRK 511 401-UUS F
GUID-0FC081B2-0BC8-4EB8-9529-B941E51F18EE v7
GUID-45572680-3A39-4B3C-8639-4E4C5A95AA26 v10
Bay control REC670
Application manual