Schweitzer Engineering Laboratories SEL-421-4 - Table B.2 Analog Quantity Differences; Analog Quantity Changes

B.2
SEL-421 Relay Instruction Manual Date Code 20171021
Converting Settings From SEL-421-0, -1, -2, -3 to SEL-421-4, -5
Analog Quantity Changes
Analog Quantity Changes
In the SEL-421-4, -5, some of the Analog Quantity names have changed.
Because the SEL-421-4, -5 no longer supports two main boards there are no lon-
ger ADC-style inputs available on the main board. As a result, the quantities
IN101A–IN107A and IN101V–IN107V are no longer available. Furthermore,
whereas the old SEL-421 only supported synchrophasor voltage quantities on the
line (Y or Z), the SEL-421-4, -5 supports synchrophasor voltage on both Y and
Z. The following table shows the old line quantities and the new Y and Z quanti-
ties.
Table B.2 Analog Quantity Differences (Sheet 1 of 2)
Old Line Name New Y Terminal Name New Z Terminal Name
VALPMMD VAYPMMD VAZPMMD
VBLPMMD VBYPMMD VBZPMMD
VA L P M M VAY P M M VA Z P M M
VBLPMM VBYPMM VBZPMM
VCLPMM VCYPMM VCZPMM
VA L P M A VAY P M A VA Z P M A
VBLPMA VBYPMA VBZPMA
VCLPMA VCYPMA VCZPMA
VA L P M R VAY P M R VA Z P M R
VBLPMR VBYPMR VBZPMR
VCLPMR VCYPMR VCZPMR
VA L P M I VAY P M I VA Z P M I
VBLPMI VBYPMI VBZPMI
VCLPMI VCYPMI VCZPMI
V1LPMM V1YPMM V1ZPMM
V1LPMA V1YPMA V1ZPMA
V1LPMR V1YPMR V1ZPMR
V1LPMI V1YPMI V1ZPMI
VALPMMD VAYPMMD VAZPMMD
VBLPMMD VBYPMMD VBZPMMD
VCLPMMD VCYPMMD VCZPMMD
VA L P M A D VAY P M A D VA Z P M A D
VBLPMAD VBYPMAD VBZPMAD
VCLPMAD VCYPMAD VCZPMAD
VA L P M R D VAY P M R D VA Z P M R D
VBLPMRD VBYPMRD VBZPMRD
VCLPMRD VCYPMRD VCZPMRD
VA L P M I D VAY P M I D VA Z P M I D
VBLPMID VBYPMID VBZPMID
VCLPMID VCYPMID VCZPMID
V1LPMMD V1YPMMD V1ZPMMD
V1LPMAD V1YPMAD V1ZPMAD