ABB Relion 670 Series Applications Manual page 522
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
- Technical reference manual (1232 pages) ,
- Applications manual (944 pages)
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Section 18
Monitoring
current calculation is done numerically by setting
any auxiliary transformers or zero sequence traps. However, it is necessary to consider zero
sequence currents from every individual winding by proper setting of
On the other hand, winding current transformers measure the winding currents directly so
that there is no need to calculate winding currents. In these cases, the
Off and ConnTypeWx should be set as WYE .
as
The following settings are related to the winding current calculation which is set under
advanced settings.
Common base IED values for primary current (
particular winding are set in global base values for settings function GBASVAL. The settings
GlobalBaseSelW1 , GlobalBaseSelW2 and GlobalBaseSelW3 in the through fault monitoring
function are used to select the corresponding GBASVAL function as a reference.
GlobalBaseSelW1 : It defines the GBASVAL function instance for the reference of base values for
winding 1. Similarly,
the GBASVAL function instance for winding 2 and winding 3 respectively.
NoOfWindings : It defines the number of windings in a transformer. It has two options to select
between;
the third winding related outputs are set to zero. General data in the through fault monitoring
report will show zero for all outputs which is related to winding 3 for two-winding
configuration.
ConnTypeW1 : It defines the connection type of winding 1. It has two options to select between;
WYE and Delta . Similarly, connection types shall be set for winding 2 and winding 3 in settings
which designated with W2 and W3 in the settings name. In this case, if more than one winding
connection type is
ClockNumberW2 : It defines the phase displacement between winding 1 and winding 2. It has
the options to select the clock number between 0 to 11. Similarly, the phase displacement
between winding 1 and winding 3 shall be set using setting
18.12.3.3
On-line correction with on-load tap changer position
The PTRSTHR function in the IED has a built-in logic to correct the calculated winding current
according to the present tap position of an on-load tap changer. The following settings are
related this correction feature which is set under advanced settings:
OLTCWinding : It defines where the OLTC's (OLTC1, OLTC2) are physically located. It has 10
options to select between;
2 / Winding 1, Winding 3 / Winding 2, Winding 1 / Winding 2, Winding 3 / Winding 3, Winding 1 /
Winding 3, Winding 2 .
•
If the value
do not exist and it disregards all other settings related to OLTC's.
•
If either one of the
assumes that only one OLTC has existed and it discards settings related to second OLTC.
•
If any values other than the above-mentioned options are selected, then the function
assumes that the OLTC1 is located in first mentioned winding and OLTC 2 is located in
secondly mentioned winding. For example, if the value
then the function assumes OLTC1 is located in winding 1 and OLTC2 is located in winding
3.
LowTapOLTC1 : It defines the tap position number at which minimum voltage is possible for
OLTC1.
RatedTapOLTC1 : It defines the tap position number at which rated current and voltage of that
winding for OLTC1.
516
GlobalBaseSelW2 and GlobalBaseSelW3 settings shall be used to define
Two windings and Three windings . When the value Two windings is selected, then
Delta , then setting ZSCurrCor shall be set as Off .
Not Used / Winding 1 / Winding 2 / Winding 3 / Winding 1, Winding
Not Used is selected, then the function assumes that both OLTC1 and OLTC2
Winding 1 / Winding 2 / Winding 3 values is selected, then the function
© Copyright 2017 Hitachi Power Grids. All rights reserved
ZSCurrCor = Off or On and does not require
IBase ) and primary voltage ( UBase ) for a
ClockNumberW3 .
Winding 1, Winding 3 is selected,
1MRK 511 401-UEN Rev. K
ZSCurrCor to Off or On .
ZSCurrCor should be set
GUID-F2C11B7D-37EB-4122-A774-EC5569A715CE v1
Bay control REC670
Application manual
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