Instructional Literature
Page
108
Effective: May 2008
Instructions for the FP-6000 Protective Relay
For more information visit: www.eaton.com
IB02602004E
Figure 25. Cold Load Pickup Logic.
5.4.11 Change Password
The factory default password is 0000. A password of 0000 will
always be accepted during the first two minutes after the FP-6000
is powered up. This allows the user to enter a new password, in
case the password is forgotten.
To change the password, select Change Password setting in the
“Setting Main” display window. Use the single arrow Up
pushbuttons to move among the 4-character locations of the
password and use the single arrow Down pushbuttons to change
the value of the 4-character password. Zero through nine and A
to Z are available for each password character.
If the user presses Enter for the password window without
changing any password character the default password of 0 is
accepted. The user can change the password to any nonzero
values. However, if the user changes the password to any
nonzero values, pressing Enter will not permit entry to the
settings or the test functions. The correct password has to be
entered.
The same password is valid for setting mode as well as the test
mode.
The FP-6000 password is not valid for PowerNet. PowerNet has
its own password scheme.
5.4.12 Breaker Wear Curve Setting
The operation life of a power circuit breaker is limited by its
interrupting current and number of operations. Usually
manufacturers of the circuit breaker provide the user a guideline
of the breaker maintenance schedule with a so-called breaker
maintenance curve. To well maintain the breaker in good
working condition, the user needs the breaker operation statistics
to make the maintenance schedule accordingly. The
FP-6000 provides the user a means to implement the breaker
wear curve and make a trip or alarm decision based on the curve
that the user provides. There are up to ten points that the user
can use to describe their breaker wear curve and each point has
two settings: interrupt current and allowed operation counts (see
Table 24 Breaker Curve). No matter how many points are used,
the operation counts the last point as zero. When the interrupted
current is less than or equal to the interrupt current at the last
point, the FP-6000 will interpolate the allowed operation counts
based on the breaker wear curve. When the interrupted current
is greater than the interrupt current at the last point, the FP-6000
will assume zero operation counts. Note that the interrupt
current on the breaker wear curve is in per unit.
The breaker wear level or breaker interrupt capacity used is
determined based on the highest interrupt current among three
phases, and it is monitored and recorded in the history log.
There are two settings, breaker wear alarm and lockout that, if
enabled, can be used for different applications. The breaker wear
lockout state is linked to the autoreclose logic. If it is on, the
autoreclose logic will be forced to the Lockout mode. Also, the
maximum one-time interrupt capacity used is recorded and used
to lockout the autoreclose logic.
Maximum One Time Interrupt Capacity Used =
Remaining Breaker Interrupt Capacity =1 –
Breaker Interrupt Capacity Used =
If the remaining breaker interrupt capacity is less than the
maximum one-time interrupt capacity used, the autoreclose logic
will be forced to Lockout mode.
The breaker operation is limited by not only accumulated
interrupt capacity but also the frequency that the breaker
operates. Another setting, Accumulated Interrupt Current Per
Hour, is added in the FP-6000 to alarm excessive breaker
operations.
These three new settings are listed under the system alarm and
they are also input options for the programmable logic gates.
Along with the original FP-5000 offerings, there are five settings
to characterize the breaker operations. See the new settings in
the system alarm setting table.
5
2
a
AutoRec
l
osing in Process
Co
l
d Load Pickup Contro
l
S
witch OC Pickups
Co
l
d Load Pickup Contro
l
Function Enab
l
e
0
3c
A
ll
Phase Currents
Less than Imin
T1
0
Trip
Load Off Time
T
2
0
5
2
a
Co
l
d Load Pickup Contro
l
Timeout
Load>P1
0
T3+
H
T3
0
Load Inrush Diminish Timer
S
R
Q
Load<0.9P1
5
2
a
AutoRec
l
osing in Process
Co
l
d Load Pickup Contro
l
S
witch OC Pickups
Co
l
d Load Pickup Contro
l
Function Enab
l
e
0
3c
0
3c
A
ll
Phase Currents
Less than Imin
T1
0
T1
0
Trip
Load Off Time
T
2
0
T
2
0
T
2
0
5
2
a
Co
l
d Load Pickup Contro
l
Timeout
Load>P1
0
T3+
H
T3
0
Load Inrush Diminish Timer
S
R
Q
Load<0.9P1
Load>P1
0
T3+
H
T3
0
T3
0
Load Inrush Diminish Timer
S
R
Q
S
R
Q
Load<0.9P1