14.54
SEL-311C Relay Instruction Manual Date Code 20060320
Application Settings for SEL-221 Series Relays
SEL-2PG10 to SEL-311C Settings Conversion Guide
Application Settings
From Access Level 2, set the SEL-311C application setting to “2PG10” as
shown below:
=>>SET APP TERSE <Enter>
Line Parameter Settings:
Application
(311C,221G,221G5,221H,221F,221F3,221C,221-16,2PG10)APP = 311C ? 2PG10 <Enter>
Enable Settings:
Fault Location(Y,N) EFLOC = Y ? END <Enter>
Save Changes(Y/N)? Y <Enter>
Settings saved
=>>
Convert SEL-2PG10
Primary Quantities to
SEL-311C Secondary
Quantities
All SEL-2PG10 current settings must be converted from primary to secondary
amps to be used in the SEL-311C. Divide the SEL-2PG10 current setting by
the current transformer ratio setting (CTR) to make the change.
SEL-2PG10 impedance settings must be converted from percent of primary
line impedance to secondary impedance in ohms. For example, the Zone 1
distance setting in the SEL-311C (Z1P) is calculated as
Equation 14.8
Convert SEL-2PG10
Settings to SEL-311C
Settings
Table 14.32 shows all the SEL-311C settings that must be entered for the relay
to perform protection similar to the SEL-2PG10 when APP = 2PG10.
Calculate each SEL-311C setting from the corresponding SEL-2PG10 setting
using the formula shown. Instruction manual references are to subsection
headings rather than to section headings.
Carefully note the difference between the SEL-311C and SEL-2PG10 in the
implementation of certain protection and logic schemes. Always thoroughly
test logic schemes to be sure they operate as intended.
where:
Z1% = the SEL-2PG10 distance reach setting
Z1MAG = the SEL-311C positive-sequence line impedance setting
in secondary ohms
Z1P = the SEL-311C Zone 1 reach setting in secondary ohms
Z1P
Z1%
100
------------
Z1MAG• =
Table 14.32 SEL-311C Settings Calculated From SEL-2PG10 Settings (Sheet 1 of 2)
SEL-311C
Setting
a
Calculated From SEL-2PG10 Settings
SEL-311C Instruction
Manual Section
SEL-2PG10 Instruction
Manual Section
RID None Settings Sheets for the
SEL-311C Relay
Section 4—Set
TID = ID
CTR = CTR Settings Sheets for the
SEL-311C Relay
CTRP = CTR
PTR = PTR
PTRS = SPTR
Z1MAG
Settings Sheets for the
SEL-311C Relay
R1
2
X1
2
+()=
CTR
PTR
------------
•
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