Schweitzer Engineering Laboratories SEL-311C - Page 561

14.45
Date Code 20060320 Instruction Manual SEL-311C Relay
Application Settings for SEL-221 Series Relays
SEL-221C to SEL-311C Settings Conversion Guide
Default Tripping Logic Equations
TR = M1P + M3PT + 67G1 + 67G2T + 67G3T + 51PT + 51GT + OC
TRSOTF = M1P + M2P + M3P + 67G1 + 67G2 + 67G3 + 51PT + 51GT + 50P1
DTT = IN101 + SV2 * IN102 + SV3 * !IN103
Default Reclose Logic Equations
79RI = MPP1 + 67G1
79DTL = MABC1 + MABC2 + MABC3 + M3PT + 50P1 + 51PT + 51GT + 67G2T +
67G3T + OC + IN101 + SV13
Default Output Contact Logic Equations
OUT101 = TRIP
OUT102 = TRIP
OUT103 = CLOSE
OUT104 = M2P + 67G2 (Reserved for MA1)
OUT105 = 51PT + 51GT (Reserved for MA2)
OUT106 = MPP1 + 67G1 (Reserved for MA3)
OUT107 = LOP (Reserved for MA4)
SELOGIC Variables Equations
SV1 = 50P2 * ILOP
SV2 = 0 (Reserved for MPT)
SV3 = 0 (Reserved for MBT)
SV4 = 1 (Reserved for DLC)
SV5 = 0 (Reserved for LLC)
SV6 = 1 (Reserved for CVC)
SV7 = 1 (Reserved for VSA)
Figure 14.3 shows the implementation of SEL-221C voltage supervised
reclosing in the SEL-311C. These settings are made automatically by the
SEL-311C when setting APP = 221C. These assignments cannot be changed
unless setting APP is changed back to APP = 311C.
SEL
OGIC variables SV4–SV7 are used for SEL-221C settings DLC, LLC,
CVC, and VSA. SEL
OGIC variable SV13 must be entered into the 79DTL
equation or voltage supervised reclosing will misoperate. It is recommended
that, after making voltage supervised reclosing settings, the reclosing should
be tested to verify intended performance.
51NT 67N1 67N2 67N3 51NP Z1P Z2P Z3P
11000100
DF DR Z2GT Z3GT 50MF RC R1 Z3PT
00110001
50M TRIP TC DT 52BT 59N
00110000
Table 14.27 Default SEL-221C Mask Logic Setting for MTU (Sheet 2 of 2)
NOTE: SELOGIC variable SV13 must
be in the 79DTL equation for the
correct operation of voltage
supervised reclosing.
!
CAUTION
Do not set SV4 (DLC) and SV5 (LLC)
equal to a logical 1 at the same time.
This is an illegal condition in the
SEL-221C, and will cause misoperation
of voltage supervised reclosing!