Two Step Residual Overvoltage Protection Rov2Ptov (59N); Identification - ABB REB670 Applications Manual

Section 8
Voltage protection
8.3
8.3.1
250
ResetTypeCrvn: This parameter for inverse time characteristic can be set:
Instantaneous, Frozen time, Linearly decreased. The default setting is Instantaneous.
tIResetn: Reset time for step n if inverse time delay is used, given in s. The default
value is 25 ms.
TDn: Time multiplier for inverse time characteristic. This parameter is used for co-
ordination between different inverse time delayed undervoltage protections.
ACrvn, BCrvn, CCrvn, DCrvn, PCrvn: Parameters to set to create programmable under
voltage inverse time characteristic. Description of this can be found in the technical
reference manual.
CrvSatn: 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:
CrvSatn
× - >
B C 0
100
EQUATION1448 V1 EN-US
HystAbsn: Absolute hysteresis set in % of VBase. The setting of this parameter is
highly dependent of the application. If the function is used as control for automatic
switching of reactive compensation devices the hysteresis must be set smaller than the
voltage change after switching of the compensation device.
Two step residual overvoltage protection ROV2PTOV
(59N)

Identification

Function description
Two step residual overvoltage
protection
IEC 61850 IEC 60617
identification identification
ROV2PTOV
2(U0>)
IEC15000108 V1 EN-US
Busbar protection REB670 2.2 ANSI
1MRK 505 370-UUS A
(Equation 71)
IP14546-1 v4
SEMOD54295-2 v6
ANSI/IEEE C37.2
device number
59N
Application manual