ABB RET670 - Setting Parameters

ACrvn, BCrvn, CCrvn, DCrvn, PCrvn: Parameters for step n, to set to create
programmable undervoltage inverse time characteristic. Description of this can be
found in the technical reference manual.
CrvSatn: Set tuning parameter for step n. When the denominator in the expression of
the programmable curve is equal to zero the time delay will be infinity. There will be
an undesired discontinuity. Therefore, a tuning parameter CrvSatn is set to compensate
for this phenomenon. In the voltage interval Pickup> up to Pickup> · (1.0 + CrvSatn/
100) the used voltage will be: Pickup> · (1.0 + CrvSatn/100). If the programmable
curve is used this parameter must be calculated so that:
0
100
CrvSatn
B C× - >
EQUATION1448 V1 EN (Equation 405)
HystAbsn: Absolute hysteresis for step n, set in % of VBase. The setting of this
parameter is highly dependent of the application.
3.8.3.3 Setting parameters
Table 129: ROV2PTOV (59N) Group settings (basic)
Name
Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Disable/Enable Operation
VBase 0.05 - 2000.00 kV 0.05 400.00 Base voltage
OperationStep1 Disabled
Enabled
- - Enabled Enable execution of step 1
Characterist1 Definite time
Inverse curve A
Inverse curve B
Inverse curve C
Prog. inv. curve
- - Definite time Selection of time delay curve type for step 1
Pickup1 1 - 200 %VB 1 30 Voltage setting/pickup value (DT & TOV),
step 1 in % of VBase
t1 0.00 - 6000.00 s 0.01 5.00 Definitive time delay of step 1
t1Min 0.000 - 60.000 s 0.001 5.000 Minimum operate time for inverse curves for
step 1
TD1 0.05 - 1.10 - 0.01 0.05 Time multiplier for the inverse time delay for
step 1
HystAbs1 0.0 - 100.0 %VB 0.1 0.5 Absolute hysteresis in % of VBase, step 1
OperationStep2 Disabled
Enabled
- - Enabled Enable execution of step 2
Table continues on next page
1MRK504116-UUS C Section 3
IED application
527
Application manual