Schweitzer Engineering Laboratories SEL-311C, Instruction Manual

Page: 317 / 748

9.23
Date Code 20060320
Instruction Manual SEL-311C Relay
Setting the Relay
Relay Word Bits (Used in SEL
OGIC
Control Equations)
19 CLOSE Close logic output asserted (see Figure 6.1 ) Output contact assignment
CF Close failure condition (asserts for 1/4 cycle; see Figure 6.1 ) Control
TRGTR Target Reset. TRGTR pulses to logical 1 for one processing inter-
val when either the
{TARGET RESET} pushbutton is pushed or the
TAR R serial port command is executed (see Figure 5.1 and
Figure 5.17 )
52A Circuit breaker status
(asserts to logical 1 when circuit breaker is closed; see
Figure 6.1 )
3PO Three pole open condition (see Figure 5.3 )
SOTFE Switch-onto-fault condition (see Figure 5.3 )
VPOLV Positive-sequence polarization voltage valid
(see
Figure 3.4 – Figure 3.12 and Figure 4.15 )
Indication
50L Phase instantaneous overcurrent element
for closed circuit breaker detection (any phase
current above pickup setting 50LP; see
Figure 5.3 )
20 PDEM Phase demand current
above pickup setting PDEMP (see
Figure 8.13 )
GDEM Residual ground demand current
above pickup setting GDEMP (see
Figure 8.13 )
QDEM Negative-sequence demand current
above pickup setting QDEMP (see
Figure 8.13 )
TRIP Trip logic output asserted (see Figure 5.1 ) Output contact assignment
50QF Forward direction negative-sequence overcurrent threshold
exceeded (see
Figure 4.5 , Figure 4.6 , and Figure 4.14 )
Directional threshold
50QR Reverse direction negative-sequence overcurrent threshold
exceeded (see
Figure 4.5 , Figure 4.6 , and Figure 4.14 )
50GF Forward direction residual ground overcurrent threshold exceeded
(see
Figure 4.5 and Figure 4.7 )
50GR Reverse direction residual ground overcurrent threshold exceeded
(see
Figure 4.5 and Figure 4.7 )
21 32QF Forward directional control routed to phase-distance elements
(see
Figure 4.13 and Figure 4.14 )
Directional control
32QR Reverse directional control routed to phase-distance elements
(see
Figure 4.13 and Figure 4.14 )
32GF Forward directional control routed to ground distance elements
(see
Figure 4.5 and Figure 4.12 )
32GR Reverse directional control routed to ground distance elements
(see
Figure 4.5 and Figure 4.12 )
32VE Enable for zero-sequence voltage-polarized directional element
(see
Figure 4.5 and Figure 4.7 )
32QGE Enable for negative-sequence voltage-polarized directional element
(see
Figure 4.5 and Figure 4.6 )
32IE Enable for channel IP current-polarized directional element
(see
Figure 4.5 and Figure 4.7 )
32QE Enable for negative-sequence voltage-polarized directional element
(see
Figure 4.13 and Figure 4.14 )
Table 9.6 Relay Word Bit Definitions for the SEL-311C (Sheet 7 of 16)
Row Bit Definition Primary Application