14.43
Date Code 20060320 Instruction Manual SEL-311C Relay
Application Settings for SEL-221 Series Relays
SEL-221C to SEL-311C Settings Conversion Guide
Convert SEL-221C
Output Mask Logic
Settings to SELOGIC
Control Equations
See Programmable Output Contact Mask Settings in Section 5: Applications
in the SEL-221C Instruction Manual for a description of output masks. In the
SEL-311C, output masks are replaced by SEL
OGIC control equations as
shown in Table 14.25.
Table 14.26 shows all SEL-221C Relay Word bits, and an approximate
equivalent SEL-311C SEL
OGIC expression, when setting APP = 221C in the
SEL-311C. Table 14.25 shows each SEL-221C Mask Logic Setting and the
equivalent SEL-311C SEL
OGIC control equation. To convert an SEL-221C
Mask Logic Setting to a SEL
OGIC control equation, logically OR each
appropriate SEL-221C Relay Word bit equivalent expression (Table 14.26)
and enter the resultant expression in the related SEL
OGIC control equation
listed in Table 14.25.
SV1PU = 50MFD Section 5—Medium Set Overcur-
rent Setting (50M)
SV9DO = VCT Section 2—Reclosing Relay
a
SEL-311C phase-to-phase fault detector settings 50PP1, 50PP2, and 50PP3 are set to 0.1 * I
NOM
and are hidden. This corresponds to
SEL-221C setting 50L.
b
Curve U1 in the SEL-311C is slightly different from curve 1 in the SEL-221C. Time dial adjustments may be necessary.
Table 14.24 SEL-311C Settings Calculated From SEL-221C Settings (Sheet 4 of 4)
SEL-311C
Setting
a
Calculated From SEL-221C Settings
SEL-311C Instruction
Manual Section
SEL-221C Instruction
Manual Section
Ta ble 1 4. 25 SE L- 31 1C SE L OGIC Control Equation Equivalent to Each
SEL-221C Mask Logic Setting
SEL-221C Settings Mask SEL-311C SELOGIC Control Equations
MTU TR
MPT SV2 (DTT)
MTB SV3 (DTT)
MTO TRSOTF
MA1 OUT104
MA2 OUT105
MA3 OUT106
MA4 OUT107
MRI 79RI
MRC 79DTL
Ta ble 1 4. 26 SE L
OGIC Equivalent to SEL-221C Relay Word Bits (Sheet 1 of 2)
SEL-221C Relay Word Bit
Equivalent
SEL
OGIC Expression
51PT 51PT
1ABC MABC1
2ABC MABC2
3ABC MABC3
51PP 51P
50H 50P1
50L None (Phase-Phase Current Fault Detector
Setting 50PP1)
LOP ILOP
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