Schweitzer Engineering Laboratories SEL-311C - Voltage Elements; Voltage Values; Voltage Element Settings; Table 3.13 Voltage Values Used by Voltage Elements

3.40
SEL-311C Relay Instruction Manual Date Code 20060320
Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements
Voltage Elements
Voltage Elements
Enable SEL-311C voltage elements by making the enable setting:
EVOLT = Y
Voltage Values
Voltage elements operate from the voltage values shown in Table 3.13.
Voltage
Element Settings
Table 3.14 lists available voltage elements and the corresponding voltage
inputs and settings ranges for the SEL-311C (see Figure 1.2 for voltage input
connection).
Table 3.13 Voltage Values Used by Voltage Elements
Voltage Description
V
A
A-phase voltage, from SEL-311C rear-panel voltage input VA
V
B
B-phase voltage, from SEL-311C rear-panel voltage input VB
V
C
C-phase voltage, from SEL-311C rear-panel voltage input VC
V
AB
Calculated phase-to-phase voltage
V
BC
Calculated phase-to-phase voltage
V
CA
Calculated phase-to-phase voltage
3V
0
Residual voltage (VA + VB + VC)
V
2
Negative-sequence voltage
V
1
Positive-sequence voltage
V
S
Synchronism check voltage, from SEL-311C rear-panel voltage input VS
a
a
Voltage V
S
is used in the synchronism check elements described in Synchronism Check
Elements on page 3.44. Voltage V
S
is also used in the three voltage elements described at the
end of Tab l e 3.1 4 and in Figure 3.29. These voltage elements are independent of the
synchronism check elements, even though voltage V
S
is used in both.
Table 3.14 Voltage Elements Settings and Settings Ranges (Sheet 1 of 2)
Voltage
Element
(Relay
Word Bits)
Operating
Voltage
Pickup Setting/Range
See
Figure
27A V
A
27P Figure 3.27
27B V
B
OFF, 0.00–150.00 V secondary
27C V
C
3P27 27A * 27B * 27C
59A V
A
59P
59B V
B
OFF, 0.00–150.00 V secondary
59C V
C
3P59 59A * 59B * 59C