Schweitzer Engineering Laboratories SEL-787-2 Manual page 40

40
Differential Quantities: ±5% of reading plus ±0.1 A (5 A
nominal), ±0.02 A (1 A nominal)
Current Harmonics: ±5% of reading plus ±0.1 A (5 A
nominal), ±0.02 A (1 A nominal)
I1 Positive-Sequence
Current: ±2% of reading
IG (Residual Current): ±2% of reading, ±2° (±5.0° at 0.2–0.5 A
for relays with I
IN (Neutral Current): ±1% of reading, ±1° (±2.5° at 0.2–0.5 A
for relays with I
3I2 Negative-Sequence
Current: ±2% of reading
System Frequency: ±0.01 Hz of reading for frequencies
within 15–70 Hz (requires ac voltage
inputs, V1 > 60 V)
Line-to-Line Voltages: ±1% of reading, ±1° for voltages
within 24–264 V
Line-to-Ground Voltages: ±1% of reading, ±1° for voltages
within 24–264 V
Voltage Harmonics: ±5% of reading plus ±0.5 V
V1 Positive-Sequence ±2% of reading for voltages
Voltage: within 24–264 V
3V2 Negative-Sequence ±2% of reading for voltages
Voltage: within 24–264 V
Real Three-Phase
Power (kW): ±3% of reading for 0.10 < pf < 1.00
Reactive Three-Phase
Power (kVAR): ±3% of reading for 0.00 < pf < 0.90
Apparent Three-Phase
Power (kVA): ±3% of reading
±2% of reading for 0.86  pf  1
Power Factor:
RTD Temperatures: ±2°C
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itation software, firmware, and documentation.
The information in this document is provided for informational use only and is subject to
change without notice. Schweitzer Engineering Laboratories, Inc. has approved only the
English language document.
This product is covered by the standard SEL 10-year warranty. For warranty details, visit
selinc.com or contact your customer service representative.
SEL-787-2, -3, -4 Data Sheet
Synchrophasor Accuracy
Maximum Message Rate
= 1 A)
NOM
= 1 A)
NOM
Accuracy for Voltages
Accuracy for Currents
2350 NE Hopkins Court • Pullman, WA 99163-5603 U.S.A.
Tel: +1.509.332.1890 • Fax: +1.509.332.7990
selinc.com • info@selinc.com
Nominal 60 Hz System: 60 messages per second
Nominal 50 Hz System: 50 messages per second
The following are the accuracy specifications for voltages and
currents for the SEL-787-3E and SEL-787-3S models. Note that
the SEL-787-4X model does not track frequency, so the accuracy
specifications are only applicable when the applied signal
frequency equals FNOM.
Level 1 compliant as specified in IEEE C37.118 under the
following conditions for the specified range.
Conditions
➤
At maximum message rate
➤
When phasor has the same frequency as the positive-sequence
voltage
➤
Frequency-based phasor compensation is enabled
(PHCOMP := Y)
➤
The narrow bandwidth filter is selected (PMAPP := N)
Range
Frequency: ±5.0 Hz of nominal (50 or 60 Hz)
Magnitude: 30 V–250 V
Phase Angle: –179.99° to 180°
Out-of-Band Interfering
10 Hz  Fs  (2 • FNOM)
Frequency (Fs):
Level 1 compliant as specified in IEEE C37.118 under the
following conditions for the specified range.
Conditions
➤
At maximum message rate
➤
When phasor has the same frequency as the positive-sequence
voltage
➤
Frequency-based phasor compensation is enabled
(PHCOMP := Y)
➤
The narrow bandwidth filter is selected (PMAPP := N)
Range
Frequency: ±5.0 Hz of nominal (50 or 60 Hz)
Magnitude: (0.4–2) • I
Phase Angle: –179.99° to 180°
Out-of-Band Interfering
10 Hz  Fs  (2 • FNOM)
Frequency (Fs):
*PDS787-02*
(I = 1 A or 5 A)
NOM NOM
Date Code 20200331