3.27
Date Code 20060320 Instruction Manual SEL-311C Relay
Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements
Instantaneous/Definite-Time Overcurrent Elements
Figure 3.19 Levels 1 Through 3 Phase Instantaneous/Definite-Time Overcurrent Elements
Torque Control
Levels 1 through 3 in Figure 3.19 have corresponding SELOGIC control
equation torque control settings 67P1TC–67P3TC. SEL
OGIC control equation
torque control settings cannot be set directly to logical 0. The following are
torque control setting examples for Level 1 phase instantaneous/definite-time
overcurrent elements 67P1/67P1T.
67P1TC = 1 Setting 67P1TC set to logical 1:
Then 67P1/67P1T follows 50P1.
67P1TC = IN105 Input IN105 deasserted (67P1TC = IN105 = logical 0):
Phase instantaneous/definite-time overcurrent elements 67P1/67P1T are
defeated and nonoperational, regardless of any other setting.
Input IN105 asserted (67P1TC = IN105 = logical 1):
67P1/67P1T follows 50P1.
67P1TC = M2P 67P1/67P1T uses the Zone 2 mho phase distance element to
provide forward directional control.
_
+
_
+
_
+
_
+
_
+
_
+
50P1P
(Setting)
50P2P
(Setting)
|IA|
|IB|
|IC|
50P1
50P2
_
+
_
+
_
+
50P3P
(Setting)
50P3
67P1D
0
67P1TC
(SEL
OGIC
)
67P1
67P1T
67P2D
0
67P2TC
SEL
OGIC
67P2
67P2T
67P3D
0
67P3TC
SEL
OGIC
67P3
67P3T
Relay
Word
Bits
Enabled
Levels
Level 1
E50P ≥ 1
(Setting)
Level 2
E5OP ≥ 2
(Setting)
Level 3
E5OP = 3
(Setting)
NOTE: All overcurrent element
SEL
OGIC control equation torque
control settings are set directly to
logical 1 (e.g., 67P1TC = 1) for the
factory default settings. See SHO
Command (Show/View Settings) on
page 10.25 for a list of the factory
default settings.
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