Two Step Overvoltage Protection Ov2Ptov (59); Identification - ABB REB670 Applications Manual

Section 8
Voltage protection
8.2
8.2.1
234
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> down 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
IntBlkSeln: This parameter can be set to Disabled, Block of trip, Block all. In case of a low
voltage the undervoltage function can be blocked. This function can be used to prevent
function when the protected object is switched off. If the parameter is set Block of trip or
Block all unwanted trip is prevented.
IntBlkStValn: Voltage level under which the blocking is activated set in % of VBase. This
setting must be lower than the setting Pickupn. As switch of shall be detected the setting
can be very low, that is, about 10%.
tBlkUVn: Time delay to block the undervoltage step n when the voltage level is below
IntBlkStValn, given in s. It is important that this delay is shorter than the operate time delay
of the undervoltage protection step.

Two step overvoltage protection OV2PTOV (59)

Identification

Function description
Two step overvoltage protection
IEC 61850 IEC 60617 identification
identification
OV2PTOV
3U>
SYMBOL-C-2U-SMALLER-THAN V2 EN
1MRK 505 337-UUS -
(Equation 74)
ANSI/IEEE C37.2
device number
59
Application manual