Schweitzer Engineering Laboratories SEL-311C - Page 536

14.20
SEL-311C Relay Instruction Manual Date Code 20060320
Application Settings for SEL-221 Series Relays
SEL-221H to SEL-311C Settings Conversion Guide
Z0MAG
Z0ANG
LL = LL Settings Sheets for the
SEL-311C Relay
APP None
EFLOC = LOCAT Settings Sheets for the
SEL-311C Relay
Section 2—Fault Locator
ELOP
N
Y
= LOPE
= N
= Y
Loss-of-Potential Logic on
page 4.1
Z1P Mho Phase Distance Elements
on page 3.1
Section 2—Mho Elements
Z2P NOTE: Z1MAG is an SEL-311C
setting.
Z3P
where:
Z2PD = Z2DP Zone Time Delay Elements on
page 3.20
Section 5—Choice of Zone 2 and
Zone 3 Time Delay Settings
Z3PD = Z3DP
50P1P = 50H/CTR Switch-Onto-Fault Trip Logic
on page 5.7
Section 5—50H, High-Set Phase
Overcurrent Element
50P2P = 50M/CTR Loss-of-Potential Logic on
page 4.1
Section 5—50 M, Medium-Set
Phase Overcurrent Element
50G1P = 50N1P/CTR Instantaneous/Definite-Time
Overcurrent Elements on
page 3.26
Section 2—Logic Diagrams
50G2P = 50N2P/CTR
50G3P = 50N3P/CTR
67G2D = Z2DG
67G3D = Z3DG
51GP = 51NP Residual Ground Time-Overcur-
rent Element on page 3.36
Section 2—51N Residual Time-
Overcurrent Element
51GC
b
U1
U2
U3
U4
= 51NC
= 1
= 2
= 3
= 4
51GTD = 51NTD
Table 14.9 SEL-311C Settings Calculated From SEL-221H Settings (Sheet 2 of 3)
SEL-311C
Setting
a
Calculated From SEL-221H Settings
SEL-311C Instruction
Manual Section
SEL-221H Instruction
Manual Section
R0
2
X0
2
+()
=
CTR
PTR
------------
•
Arc tan
X0
R0
-------
= (degrees)
Z1%
100
-----------
Z1MAG• =
Z2%
100
-----------
Z1MAG• =
Z3%
100
-----------
Z1MAG• =
Z1MAG R1
2
X1
2
+()=
CTR
PTR
------------
•