ComAp MainsPro - Loss of Mains (LOM) Settings; Vector Shift Limit; ROCOF Settings; LOM Delays

MainsPro, SW version 1.4, ©ComAp – January 2013
MainsPro Reference Guide
3-9
LOM, A.LOM
VS lim, A.VS lim [°]
Threshold at which the Vector shift protection is activated.
Range: 1..50°
0 = OFF, the Vector shift protection is not enabled
Default setting: 0 = OFF
ROCOF, A.ROCOF [Hz/s]
Threshold at which the Rate of change of frequency (ROCOF) protection is activated.
Range: 0,1..10,0 Hz/s
0 = OFF, the ROCOF protection is not enabled
Default setting: 0 = OFF
ROCOF filt, A.ROCOF filt [-]
Number of periods considered for evaluating ROCOF protection. Higher number means lower
sensitivity and longer evaluation time. Lower number means increased sensitivity and shorter
evaluation time.
Range: 1..100
Default setting: 5 [-]
LOM Init Del, A. LOM Init Del [s]
Delay for what the Loss of Mains (LOM, i.e. Vector shift and ROCOF) protection is disabled after
sensing the valid voltage on measurement terminals (stepping into the operational area of voltage and
frequency).
Range: 0..600
Default setting: 3 s
LOM Trip Del, A.LOM Trip Del [s]
Duration of Loss of Mains (LOM, i.e. Vector shift and ROCOF) protection trip. After this delay, the fault
is considered as terminated and Fault reset is possible. In case of automatic fault reset, the timer is
started.
Range: 0..3600
Default setting: 3 s
f(BI)
Function assigned to the appropriate binary input. For description, see chapter Binary switches.
Ext
F.R.
Alt
Dis
CB Fdb
Not used (for the possibility if none of the defined BI is assigned)
Default setting:
- BI1: Ext
- BI2: F.R.
- BI3: Alt
- BI4: Dis