Schweitzer Engineering Laboratories SEL-311C - Table 3.7 OOS Relay Word Bits

3.23
Date Code 20060320 Instruction Manual SEL-311C Relay
Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements
Out-of-Step Characteristics
Zones 5 and 6 Reactance and Resistance Elements
Settings range for Zone 5 and Zone 6
Reactance Reach (X1T5 and X1T6):
0.05 to 96 Ω sec, 0.01 Ω steps
(5 A nominal)
0.25 to 480 Ω sec, 0.01 Ω steps
(1 A nominal)
Settings range for Zone 5 and Zone 6
Resistance Reach (R1R5 and R1R6):
0.05 to 70 Ω sec, 0.01 Ω steps
(5 A nominal)
0.25 to 350 Ω sec, 0.01 Ω steps
(1 A nominal)
Advanced Settings (EADVS = Y)
range for Zone 5 and Zone 6 Reactance
Reach (X1B5 and X1B6):
–96 to –0.05 Ω sec, 0.01 Ω steps
(5 A nominal)
–480 to –0.25 Ω sec, 0.01 Ω steps
(1 A nominal)
Advanced Settings (EADVS = Y)
range for Zone 5 and Zone 6 Resistance
Reach (R1L5 and R1L6):
–70 to –0.05 Ω sec, 0.01 Ω steps
(5 A nominal)
–350 to –0.25 Ω sec, 0.01 Ω steps
(1 A nominal)
Inner Blinders: Set by the relay internally at 0.1 • Z1MAG or
0.25/I
NOM
, whichever is greater.
Accuracy: ±5% of setting at line angle for 30 ≤ SIR ≤ 60
±3% of setting at line angle for SIR < 30
Transient Overreach: <5% of setting plus steady-state accuracy
Positive Sequence Current Supervision Element 50ABC
Setting Range for Positive-Sequence
Current Supervision (50ABCP):
0.50–100.00 A secondary, 0.01 A steps
(5 A nominal)
0.10–20.00 A secondary, 0.01 A steps
(1 A nominal)
Accuracy: ±0.05 A and ±3% of setting
(5 A nominal)
±0.01 A and ±3% of setting
(1 A nominal)
Transient Overreach: <5% of pickup
Max. Operating Time: See pickup and reset time curves in
Figure 3.20 and Figure 3.21.
Negative-Sequence
Current Unblock Time Delay:
Pickup Ranges:
UBD (see Figure 3.4–Figure 3.6)
0.5–120.0 cycles, 0.25-cycle steps
Out-of-Step Angle Change Unblock Rate
(Advanced Setting: EADVS = Y):
Pickup Ranges:
UBOSBF
1–10 unitless
Table 3.7 OOS Relay Word Bits (Sheet 1 of 2)
Relay
Word Bits
Description
Relay
Word Bits
Description
50ABC Positive-sequence
current above threshold
OSTO Outgoing out-of-step trip
X6ABC Impedance inside Zone 6 OST Out-of-step trip
X5ABC Impedance inside Zone 5 OSB1 Block Zone 1 during
an out-of-step condition
UBOSB Unblock out-of-step blocking OSB2 Block Zone 2 during
an out-of-step condition
Table 3.6 Out-of-Step Settings (Sheet 2 of 2)