Schweitzer Engineering Laboratories, Inc.
SEL-487B Data Sheet
29
Safety
Dielectric Strength:
IEC 60255-5:2000
IEEE C37.90-2005
Severity Level: 2500 Vac on contact
inputs, contact outputs, and analog
inputs; 3100 Vdc on power supply; type
tested for 1 minute
Impulse:
IEC 60255-5:2000
IEEE C37.90-2005
Severity Level: 0.5 J, 5 kV
Reporting Functions
High-Resolution Data
Rate:
8000 samples/second
4000 samples/second
2000 samples/second
1000 samples/second
Output Format:
Binary COMTRADE
Note: Per IEEE C37.111-1999, IEEE Standard Common Format for
Transient Data Exchange (COMTRADE) for Power Systems.
Event Reports
Length:
0.25–24 seconds (depending on LER
setting)
Resolution:
4 and 12 samples/cycle
Volatile Memory:
3 seconds of back-to-back event reports
sampled at 8 kHz
Nonvolatile Memory:
At least 4 event reports of a 3-second
duration sampled at 8 kHz
Oscillography
Volatile Memory:
3 seconds of back-to-back event reports
sampled at 8 kHz
Nonvolatile Memory:
At least 5 event reports of a 3-second
duration sampled at 8 kHz
Event Summary
Storage:
100 summaries
Sequential Events Recorder
Storage:
1000 entries
Trigger Elements:
250 relay elements
Resolution:
0.5 ms for contact inputs
Resolution:
1/12 cycle for all elements
Processing Specifications
AC Voltage and Current Inputs
12 samples per cycle, 3 dB low-pass analog filter cut-off frequency of
646 Hz, ±5%
Digital Filtering
Full-cycle cosine after low-pass analog filtering
Protection and Control Processing
12 times per power system cycle
Control Points
32 each remote bits, local control bits, latch bits in protection logic,
and latch bits in automation logic
Relay Element Pickup Ranges and Accuracies
Differential Elements
Number of Zones:
6
Number of Check Zones:
3
Number of Terminals:
Three-Relay
Application:
Single-Relay Application:
21
7
Slope 1
Setting Range:
Accuracy:
15–90%
±5% ± 0.02 • I
NOM
Slope 2
Setting Range:
Accuracy:
50–90%
±5% ± 0.02 • I
NOM
Supervising Differential Element
Quantity:
9 total, 1 per zone
(6 standard zones, 3 check zones)
Setting Range:
0.10–4.00 pu
Accuracy:
±5% ± 0.02 • I
NOM
Incremental Restraint and Operating Threshold Current
Supervision
Setting Range:
0.1–10.0 pu
Accuracy:
±5% ± 0.02 • I
NOM
Sensitive Differential Current Alarm
Quantity:
9 total, 1 per zone
(6 standard zones, 3 check zones)
Setting Range:
0.05–1.00 pu
Accuracy:
±5% ± 0.02 • I
NOM
Timer Setting Range:
50–6000 cycles
Instantaneous/Definite-Time Overcurrent Elements
Phase Current Setting Range
5 A Model:
OFF, 0.25–100.00 A secondary,
0.01 A steps
1 A Model:
OFF, 0.05–20.00 A secondary,
0.01 A steps
Accuracy (Steady State)
5 A Model:
±0.05 A, ±3% of setting
1 A Model:
±0.01 A, ±3% of setting
Transient Overreach:
<5% of setting
Timer Setting Range:
0.00–99999.00 cycles, 1/6-cycle steps
Timer Accuracy:
±0.1% of settings ±1/6 cycle
Maximum Operating
Time:
1.5 cycles
Time-Overcurrent Elements
Pickup Range
5 A Model:
0.50–16.00 A secondary, 0.01 A steps
1 A Model:
0.10–3.20 A secondary, 0.01 A steps
Accuracy (Steady State)
5 A Model:
±0.05 A, ±3% of setting
1 A Model:
±0.01 A, ±3% of setting
Time Dial Range
US:
0.50–15.00, 0.01 steps
IEC:
0.05–1.00, 0.01 steps
Curve Timing Accuracy:
±1.50 cycles, ±4% of curve time (for
current between 2 and 30 multiples of
pickup)
Reset:
1 power cycle or Electromechanical Reset
Emulation time