14.16
SEL-311C Relay Instruction Manual Date Code 20060320
Application Settings for SEL-221 Series Relays
SEL-221G-5 to SEL-311C Settings Conversion Guide
For example, the factory default setting for MRC in the SEL-221G-5 is shown
in Table 14.8. From Table 14.6, the equivalent SEL-311C SEL
OGIC control
equation to MRC is 79DTL. Constructing the logical OR of the equivalent of
each element selected in the MRC mask from Table 14.7 gives:
79DTL = M1P * !32QF + M2P * !32QF + M3P * !32QF + 50P1 + 51GT + M2PT +
M3PT + SV1T + OC + IN101 + 67G2T + 67G3T
which can be simplified to:
79DTL = (M1P + M2P + M3P) * !32QF + 50P1 + 51GT + M2PT + M3PT + SV1T +
OC + IN101 + 67G2T + 67G3T
which is the default SEL
OGIC control equation for 79DTL when APP =
221G5.
When setting APP = 221G5, the SEL-311C automatically sets the following
SEL
OGIC control equations. Change the settings just as you would change the
Mask Logic settings in an SEL-221G-5 to customize the relay logic.
Default Tripping Logic Equations
TR = M1P + M2PT + M3PT + 67G1 + 67G2T + 67G3T + 51GT + OC + SV1T
TRCOMM = Z2PGS + 67QG2S
TRSOTF = M1P + M2P + 67G1 + 67G2 + 51GT + 50P1
DTT = IN101 + SV2 * IN102
Default Reclose Logic Equations
79RI = M1P * 32QF + 67G1
79DTL = (M1P + M2P + M3P) * !32QF + 50P1 + 51GT + M2PT + M3PT + SV1T +
OC + IN101 + 67G2T + 67G3T
Default Output Contact Logic Equations
OUT101 = TRIP
OUT102 = TRIP
OUT103 = CLOSE
OUT104 = DSTRT + NSTRT + Z3XT
OUT105 = STOP + TRIP
OUT106 = OSB
OUT107 = LOP
Table 14.8 Default SEL-221G-5 Mask Logic Setting for MRC
1ABC 2ABC 3ABC 4ABC LOP 50H 50M 50L
11100100
51NT 67N1 67N2 67N3 51NP Z1P Z2P Z3P
10000000
Z2PT Z3PT OSB 3P50 50MF RC RI STOP
11001000
50N3 TRIP TC DT 52BT Z3X Z2GT Z3GT
00110011
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