Two Step Overvoltage Protection Ov2Ptov (59); Identification; Application - ABB Relion 670 Series Applications Manual

Section 8
Voltage protection
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
100
EQUATION1448 V1 EN-US
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
prevented.
IntBlkStValn : Voltage level under which the blocking is activated set in % of VBase . This setting
must be lower than the setting
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.
8.2

Two step overvoltage protection OV2PTOV (59)

8.2.1

Identification

Function description
Two step overvoltage protection
8.2.2

Application

Two step overvoltage protection OV2PTOV (59) is applicable in all situations, where reliable
detection of high voltage is necessary. OV2PTOV (59) is used for supervision and detection of
abnormal conditions, which, in combination with other protection functions, increase the security
of a complete protection system.
High overvoltage conditions are caused by abnormal situations in the power system. OV2PTOV
(59) is applied to power system elements, such as generators, transformers, motors and power
lines in order to detect high voltage conditions. OV2PTOV (59) is used in combination with low
current signals, to identify a transmission line, open in the remote end. In addition to that,
204
- >
C 0
Pickupn . As switch of shall be detected the setting can be very low,
IEC 61850
identification
OV2PTOV
Block of trip or Block all unwanted trip is
IEC 60617 ANSI/IEEE C37.2
identification device number
59
3U>
SYMBOL-C-2U-SMALLER-THAN V2 EN-US
1MRK 511 358-UUS A
(Equation 94)
IP14545-1 v3
M17002-1 v7
M13799-3 v8
Application manual