Allen-Bradley Rockwell Automation 857 User Manual page 93

Table 3.24 – Measured and recorded values of capacitor bank unbalance
protection: I >, I >> (50N/51N)
02 02
Parameter Value
Measured Io
values
dIo
Display Io>>>, Io>>>>
Recorded SCntr
values
TCntr
Flt
EDly
Isaved
SavedA
Faults (Io>>>>
only)
Total
(Io>>>> only)
Clear
(Io>>>> only)
L1-B1 (Io>>>>
only)
L1-B2 (Io>>>>
only)
L2-B1 (Io>>>>
only)
L2-B2 (Io>>>>
only)
L3-B1 (Io>>>>
only)
L3-B2 (Io>>>>
only)
Locat
(Io>>>> only)
LocAng (Io>>>>
only)
Protection Functions
Unit Default
Pu unbalance current
(including the natural unbalance
current)
A Compensated unbalance current
A Setting value
- Cumulative start counter
- Cumulative trip counter
pu The max. fault value
% Elapsed time as compared to the set
operating time; 100% = tripping
A Recorded natural unbalance current
deg Recorded phase angle of natural
unbalance current
- Allowed number of element failures
- Actual number of element failures in
the bank
-, Clear - Clear the element counters
- Number of element failures in phase
L1 in brach 1 (left side)
- Number of element failures in phase
L1 in brach 2 (right side)
- Number of element failures in phase
L2 in brach 1 (left side)
- Number of element failures in phase
L2 in brach 2 (right side)
- Number of element failures in phase
L3 in brach 1 (left side)
- Number of element failures in phase
L3 in brach 2 (right side)
- Changed unbalance current (after
automatic compensation)
- Changed phase angle of the
unbalance current (after automatic
compensation)
3-43
Description
857-UM001A-EN-P – July 2009