IL17569C
Page 5-48
FP-5000
Effective Date: 12/05
Page 5-48
For more information visit:
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Effective Date: 12/05
Figure 5-9. Sync-Check Characteristic
5.4.2.12 Alarms
Protection Alarm Settings
A full set of protection alarm settings complement the protection
elements for overcurrent, over/undervoltage, unbalance and over/
underfrequency. They are designated as another protection
element, for example 50P-3, and are programmed to the alarm
output relay and alarm LED indication. The settings are similar to
the protection settings described above. These elements may be
used for alarm, tripping or logic functions. Custom programming
of the output relay is required if the desired use is not as an
alarm function.
5.4.3 System Alarm Settings
This setting menu contains the settings needed to configure all of
the FP-5000 system alarm functions. Each alarm function can be
disabled. The system alarms are programmed to the alarm output
relay and alarm LED indication. These elements may be used for
alarm, tripping or logic functions. The outputs will need to be
configured if the desired use is not an alarm function. SYSALM
pickup in the Event Log Enable settings must be set to "Yes” to
enable logging of Pickup/Dropout events related to system alarms.
Watt Power Alarm
Units:
Sets the units for watts measurement
(kW or MW).
Threshold:
Sets the watts threshold level in units
specified, at or above which the power pickup
+
-
-
+
+
-
+
-
|Va|
|Vb|
|Vc|
-
+
-
+
+
-
-
+
LBDL
DBLL
DBDL
A
B
C
AB
BC
CA
Va
Vab
Vb
Vbc
Vc
Vca
Voltage
Compensation
VL
|VL’|
+
-
-
+
ζ
=|VB
∠(
BCT+
ε)∗Δω−
VL’|
θ
=
∠
VB+(BCT+
ε)∗Δω − ∠
VL’
Δ
f=
Δθ
/2
πΔΤ
Δ
fmax
Δ
fmin
Δ
Vmax
θ
max
-
+
-
+
Synch Block
Synch enable
From Close Initiate
Wye or Delta
In-Synch
E
x
te
rn
al
B
y
-P
as
s
Breaker Close Time
T2
0
Synch Fail
Synch Failure Timer
Slip Out of Range Alarm
Live Vmin
Dead Vmax
T1
0
T1
0
Voltage Dead Timer
in-sync flag is one of the control options for use with the Program-
mable Logic. Note that breaker status and a closed breaker
command have no effect on the sync checking process.
When Sync Timeout is set to non-zero, the sync-check is active
only if the breaker is open. In this case, the sync check function
will not only check two sources, but also the breaker status. The
in-sync flag will be set when two sources meet the in-sync and
override conditions with the breaker is open. The Sync failure flag
is set only if the frequency difference of two sources has been
within the range and a closing command has been presented, but
their magnitude or angle difference has been out of their range for
the specified Timeout. The Sync failure flag is one of the control
options for use with the Programmable Logic and it inherently has
no effect on the in-sync flag. The Sync failure flag is pulsated for
300 cycles and then resets. Also, if the breaker is closed, the Sync
failure flag will be reset. Note that the sync-check function in the
case of non-zero timeout, is independent of a closing command. A
closing command is used only to initiate the sync failure time out
process. The sync failure flag can be used to block closing breaker
through an output gate.
When a closing command from either front panel or PowerNet, or
remote is received and an in-sync condtion is detected, the closing
breaker flag will be set. In turn, this flag can directly intiate a closing
breaker action through an output gate.