Two Step Overvoltage Protection Ov2Ptov - ABB REG670 Applications Manual

Section 10
Voltage protection
10.2
10.2.1
10.2.2
406
ResetTypeCrvn: This parameter for inverse time characteristic can be set to
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.
kn: Time multiplier for inverse time characteristic. This parameter is used for
coordination between different inverse time delayed undervoltage protections.
ACrvn, BCrvn, CCrvn, DCrvn, PCrvn: Parameters to create a programmable under
voltage inverse time characteristic. Description of this can be found in the Technical
manual.
CrvSatn: Tuning parameter that is used to compensate for the undesired discontinuity
created when the denominator in the equation for the customer programmable curve
is equal to zero. For more information, see the Technical manual.
IntBlkSeln: This parameter can be set to Off, 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 UBase.
This setting must be lower than the setting Un<. 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

Identification
Function description
Two step overvoltage protection
Application
Two step overvoltage protection OV2PTOV is applicable in all situations, where
reliable detection of high voltage is necessary. OV2PTOV is used for supervision and
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
IEC 61850 IEC 60617 identification
identification
OV2PTOV
3U>
SYMBOL-C-2U-SMALLER-THAN V2 EN
1MRK 502 071-UEN -
ANSI/IEEE C37.2
device number
59
Application manual