Schweitzer Engineering Laboratories SEL-311C - Page 550

14.34
SEL-311C Relay Instruction Manual Date Code 20060320
Application Settings for SEL-221 Series Relays
SEL-221F-3 to SEL-311C Settings Conversion Guide
Z1ANG
Z0MAG
Z0ANG
LL = LL
APP None
ELOP
N
Y
= LOPE
= N
= Y
Loss-of-Potential Logic on
page 4.1
Section 5—Loss-of-Potential
(LOP) Enable Setting (LOPE)
Z1P
Z1MG
Mho Phase Distance Elements
on page 3.1
Section 5—Zone 1 Reach Setting
(Z1%)
Z2P
Z2MG
Section 5—Zone 2 Reach Setting
(Z2%)
Z3P
Z3MG
Section 5—Zone 3 Reach Setting
(Z3%)
where: NOTE: Z1MAG is an SEL-311C
setting.
Z2PD = Z2DP Zone Time Delay Elements on
page 3.20
Section 5—Zone 2 Phase and
Ground Distance
Z2GD = Z2DG Section 5—Time Delays (Z2DP,
Z2DG)
Z3D = Z3D Section 5—Zone 3 Phase and
Ground Time Delay (Z3D)
50P1P = 50H/CTR Switch-Onto-Fault Trip Logic
on page 5.7
Section 5—High Set Phase Over-
current Element Setting
50P2P None: Breaker failure phase overcurrent
pickup.
50G1P = 67NP/CTR Residual Ground Instantaneous/
Definite-Time Overcurrent Ele-
ments on page 3.28
Section 5—67NP Residual Over-
current Settings (67NP, 67NTC)
N/A
67G1TC = 1)
= 67NTC (in the SEL-311C, 50G1P is
fixed forward)
50G2P None: Breaker failure residual overcurrent
pickup.
51GP = 51NP/CTR Residual Ground Time-Overcur-
rent Element on page 3.36
Section 5—Residual Time-Over-
current Settings (51NP, 51NC,
51NTD, 51NTC)
Table 14.18 SEL-311C Settings Calculated From SEL-221F-3 Settings (Sheet 2 of 3)
SEL-311C
Setting
a
Calculated From SEL-221F-3 Settings
SEL-311C Instruction
Manual Section
SEL-221F-3 Instruction
Manual Section
Arc tan
X1
R1
-------
= (degrees) = MTA
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
------------
•