Alarm Setpoints (Address 3000); Demand Parameters (Address 31 00); Power Parameters (Address 3200) - Siemens ISGS Operator's Manual

Breaker failure protection monitors the cu rrent flow only fol­
lowing a trip by the contact identified at address 1 004 (see
section 3. 7. 1 ). N ormally, this is the contact matrixed to the
overcurrent protection (see section 3. 1 1 ).
3.8

Alarm Setpoints (Address 3000)

Use this address block to set up the alarm reporting thresh­
olds for the relay. To make parameter changes, you must
first enter the password. If you only want to review present
settings, the password steps
Perform parameter changes using steps 1 -9 of the standard
operation sequence, Table 3.4.
3.8.1

Demand Parameters (Address 31 00)

Use this address block to select the time periods for the
demand calculations performed by the relay. A demand
interval can be set for 1 5, 30, or 60 minutes and can contain
one or more subperiods. The minimum n umber of measure­
ment intervals in a subperiod is 1 0 .
Setpoints for average ampere demand and kilowatt demand
are available. For these setpoints the functions may be
enabled or disabled and th reshold values specified. The
available relay subaddresses are listed in Table 3 . 1 9.
Parameter
Subaddress
3 1 0 1 (Demand) I nterval
3 1 02 Sync Time
#
3 1 03 Subperiods for
demand interval of
60 min
#
3 1 04 Subperiods for
demand interval of
30 min
3 1 05 # Subperiods for
demand interval of
1 5
min
31 06 Over A Demand
3 1 07 Over A Demand
31 08 Over kW Demand
3 1 09 Over kW Demand
Table
3.19
Demand Parameter Configuration, M ajor Block
3 1 00
3.8.2

Power Parameters (Address 3200)

Use this address block to set parameters for the power set­
points. Setpoints for kVAR, kVA, leading power factor, and
lagging power factor are available. In each case the set­
points may be enabled or disabled, and have a threshold
value and pickup time delay specified. For the power factor
setpoints, the sign of the pickup value (leading or lagging)
may be specified.
Siemens Energy & Automation, Inc.
4 and 5 are not necessary.
Selection
1 5 , 30, or 60 min
0, 1 5 , 30, or 45
after hour
1 , 2 , 3 , 4 , 6, or 1 2
1 , 2, 3, or 6
1 or 3
Enable or Disable
0 - 9 , 999 A
Enable or Disable
0 - 999,999.99 kW
The PFLEAD function will activate when the change in
power factor crosses the pickup value while decreasing
toward a more leading or negative power factor. The PFLAG
function will activate when the change in power factor
crosses the pickup value while increasing toward a more
lagging or positive power factor. See Figure 3.6. By setting
th resholds for both PFLEAD and PFLAG, an allowable
power factor window can be defined.
Leading Power Fa ctor
..
-0.6
-0.2
PFLAG activates on P F crossing the threshold in this direction
PFLEAD activates on PF crossing the threshold i n this direction
..
Example:
PFLEAD set to
PFLAG set to
-0 6
-0.2
I
PFLEAD
Inactive
activates
Figure
3.6.
Leading and Lagging Power Factor Setpoints
The available relay subaddresses are listed in T able 3.20.
Subaddress Parameter
3201 Over kVAR
3202 Pickup
3203 Time Delay
3204 Over kVA
3205 Pickup
3206 Time Delay
3207 Over PFLEAD
Pickup
3208
3209 Sign (of pickup
value)
32 1 0 Time Delay
321 1 Over PFLAG
Pickup
32 1 2
Sign (of pickup
32 1 3
value)
32 1 4 Time Delay
Table
3.20
Power Parameter Configu ration, M ajor block
3200
3
Lagging
�
1 .0
+0.6 +0.2
�
-0.8
leading
+0.8
lagging
1 .0
+0.2
+0.6
I
PFLAG
activates
Selection
Enabled or Disabled
0 - 999,999.99
kVAR
0 - 3600 s
Enabled or Disabled
0 - 999,999.99 kVA
0 - 3600 s
Enabled or Disabled
0 . 2 - 1 . 0
Lead (+) or Lag (-)
0 - 3600 s
Enabled or Disabled
0. 2 - 1 .0
Lead (+) or Lag (-)
0 - 3600 s
27