900-00277-01-001 Rev A
91
Specifications
Grid Protection Settings (All Profiles)
Table 15 and Table 16 contain the default settings for all grid profiles (see page 39). The ranges of
adjustment are also included for reference.
NOTE:
IEEE 1547-2018 default settings are used in grid profiles where the utility has set no
requirement. In most cases this has no impact to the operating performance of the unit.
However, some value must be loaded into the settings registers, so the IEEE default values
are used. This will most commonly be seen for the
Watt/VAr
function. At present, no utilities
are known to require this function and the utilities have no need to specify
Watt/VAr
settings.
Table 15
Grid Protection Settings (IEEE 1547 and CA Rule 21)
Range of
Adjustment
Certified
Range
IEEE 1547-2003
IEEE
1547-2018
Cat III/B
CA Rule 21
Parameter
Min
Max
Min
Max
Volt/VAr
1
Disabled
Enabled
n/a
n/a
n/a
Disabled Enabled
Volt/VAr Vref (pu)
0.950
1.050
n/a
n/a
n/a
1 1
Volt/Var Vref Auto
Disabled Enabled
n/a
n/a
n/a
Disabled Disabled
Volt/VAr auto vref
response time (s)
300 5000
n/a
n/a
n/a
300 300
Volt/VAr response
time (s)
0.0 90.0
n/a
n/a
n/a
5.0 5.0
Volt/VAr 1 voltage (pu)
0.770
1.050
0.770
1.030
n/a
0.920 0.920
Volt/VAr 1 reactive
power (pu)
0.000 0.700
0.000
0.530
n/a
0.440 0.300
Volt/VAr 2 voltage (pu)
0.920
1.050
0.920
1.050
n/a
0.980 0.967
Volt/VAr 2 reactive
power (pu)
–0.700 0.700
–0.530
0.530
n/a
0.000 0.000
Volt/VAr 3 voltage (pu)
0.950
1.080
0.950
1.080
n/a
1.020 1.033
Volt/VAr 3 reactive
power (pu)
–0.700 0.700
–0.530
0.530
n/a
0.000 0.000
Volt/VAr 4 voltage (pu)
0.950
1.230
0.970
1.180
n/a
1.080 1.070
Volt/VAr 4 reactive
power (pu)
–0.700 0.000
–0.530
0.000
n/a
–0.440 –0.300
Volt/Watt Disabled
Enabled
n/a
n/a
n/a
Disabled Enabled
Volt/Watt response
time (s)
0.0 90.0
n/a
n/a
n/a
10.0 10.0
Volt/Watt 1 voltage (pu)
1.000
1.090
1.000
1.090
n/a
1.060 1.060
Volt/Watt 1 power (pu)
1.000
1.000
1.000
1.000
n/a
1.000 1.000
Volt/Watt 2 voltage (pu)
1.010
1.100
1.010
1.100
n/a
1.100 1.100
Volt/Watt 2 power (pu)
–1.000
1.000
0.000
0.000
n/a
0.000 0.000
LV1 voltage (pu)
0.000
0.980
0.500
0.950
0.880
0.880
0.880
LV1 time (s)
0.08
50.00
0.100
50.00
2.00
21.00
21.00
LV2 voltage (pu)
0.000
0.980
0.250
0.700
0.500
0.500
0.700
LV2 time (s)
0.08
50.00
0.10
50.00
0.16
2.00
11.00
LV3 voltage (pu)
0.000
0.980
0.250
0.700
n/a n/a
0.500
LV3 time (s)
0.08
50.00
0.10
50.00
n/a n/a
1.50
1
Only one of the four VAr functions (
Volt/VAr
,
Watt/VAr
,
Constant PF
,
Constant VAr
) can be enabled at one time.
