ABB REL670 2.2 IEC, Applications Manual

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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.
10.2 Two step overvoltage protection OV2PTOV
IP14545-1 v3
10.2.1 Identification
M17002-1 v8
Function description IEC 61850
identification
IEC 60617 identification ANSI/IEEE C37.2
device number
Two step overvoltage protection OV2PTOV
3U>
SYMBOL-C-2U-SMALLER-THAN V2 EN-US
59
Section 10
1MRK 506 369-UEN B
Voltage protection
536 Line distance protection REL670 2.2 IEC
Application manual