SEL-451 Data Sheet
Schweitzer Engineering Laboratories, Inc.
30
Harmonic Elements (2nd, 4th, 5th)
Pickup Range:
OFF, 5–100% of fundamental
Pickup Accuracy:
1 A nominal ±5% ±0.02 A
5 A nominal ±5% ±0.10 A
Time-Delay Accuracy:
±0.1% plus ±0.125 cycle
Ground Directional Elements
Neg.-Seq. Directional Impedance Threshold (Z2F, Z2R)
5 A Model:
–64 to 64
secondary
1 A Model:
–320 to 320
secondary
Zero-Seq. Directional Impedance Threshold (Z0F, Z0R)
5 A Model:
–64 to 64
secondary
1 A Model:
–320 to 320
secondary
Supervisory Overcurrent Pickup (50FP, 50RP)
5 A Model:
0.25 to 5.00 A 3I0 secondary
0.25 to 5.00 A 3I2 secondary
1 A Model:
0.05 to 1.00 A 3I0 secondary
0.05 to 1.00 A 3I2 secondary
Directional Power Elements
Pickup Range
5 A Model:
–20000.00 to 20000 VA, 0.01 VA steps
1 A Model:
–4000.00 to 4000 VA, 0.01 VA steps
Accuracy (Steady State):
±5 VA plus ±3% of setting at nominal
frequency and voltage
Time-Delay:
0.00–16000.00 cycles, 0.25 cycle steps
Timer Accuracy:
±0.25 cycle plus ±0.1% of setting
Undervoltage and Overvoltage Elements
Pickup Ranges
300 V Maximum Inputs
Phase Elements:
2–300 V secondary, 0.01 V steps
Phase-to-Phase Elements:
4–520 V secondary, 0.01 V steps
8 V LEA Maximum Inputs
(See
Voltage-Related Settings and LEA Inputs (Group Settings) on
for information on setting voltage elements when using LEA
inputs.)
Phase:
0.05–8.00 V
Phase-to-Phase:
0.10–13.87 V
Accuracy (Steady State)
Phase Elements:
±0.5 V plus ±3% of setting
Sequence Elements:
±0.5 V plus ±5% of setting
Transient Overreach:
<5% of pickup
Underfrequency and Overfrequency Elements
Pickup Range:
40.01–69.99 Hz, 0.01 Hz steps
Accuracy, Steady State plus
Transient:
± 0.005 Hz for frequencies between 40.00
and 70.00 Hz
Maximum Pickup/Dropout
Time:
3.0 cycles
Time-Delay Range:
0.04–400.0 s, 0.01 s increments
Time-Delay Accuracy:
± 0.1% ± 0.0042 s
Pickup Range, Undervoltage
Blocking:
20–200 V
LN
(Wye)
Pickup Accuracy,
Undervoltage Blocking:
± 2% ±0.5 V
Optional RTD Elements
(Models Compatible With SEL-2600 Series RTD Module)
12 RTD Inputs via SEL
-
2600 Series RTD Module and SEL
-
2800 Fiber-
Optic Transceiver
Monitor Ambient or Other Temperatures
PT 100, NI 100, NI 120, and CU 10 RTD-Types Supported, Field
Selectable
Pickup Range:
Off, –50° to 250°C, 1°C step
Accuracy:
±2°C
As long as 500 m Fiber-Optic Cable to SEL
-
2600 Series RTD Module
Breaker Failure Instantaneous Overcurrent
Setting Range
5 A Model:
0.50–50.0 A, 0.01 A steps
1 A Model:
0.10–10.0 A, 0.01 A steps
Accuracy
5 A Model:
±0.05 A plus ±3% of setting
1 A Model:
±0.01 A plus ±3% of setting
Transient Overreach:
<5% of setting
Maximum Pickup Time:
1.5 cycles
Maximum Reset Time:
1 cycle
Timers Setting Range:
0–6000 cycles, 0.125 cycle steps
(All but BFIDO
n
, BFISP
n
)
0–1000 cycles, 0.125 cycle steps
(BFIDO
n
, BFISP
n
)
Time-Delay Accuracy:
0.125 cycle plus ±0.1% of setting
Synchronism-Check Elements
Slip Frequency
Pickup Range:
0.005–0.500 Hz, 0.001 Hz steps
Slip Frequency
Pickup Accuracy:
±0.0025 Hz plus ±2% of setting
Close Angle Range:
3–80°, 1° steps
Close Angle Accuracy:
±3° plus ±5% of setting
Load-Encroachment Detection
Setting Range
5 A Model:
0.05–64
secondary, 0.01
steps
1 A Model:
0.25–320
secondary, 0.01
steps
Forward Load Angle:
–90° to +90°
Reverse Load Angle:
+90° to +270°
Accuracy
Impedance Measurement:
±3%
Angle Measurement:
±2°
Timer Specifications
Setting Ranges
Breaker Failure:
0–6000 cycles, 0.125 cycle steps
(All but BFIDO
n
, BFISP
n
)
0–1000 cycles, 0.125 cycle steps
(BFIDO
n
, BFISP
n
)
Communications-Assisted
Tripping Schemes:
0.000–16000 cycles, 0.125 cycle steps
Pole Open Timer:
0.000–60 cycles, 0.125 cycle steps
Recloser:
1–999999 cycles, 1 cycle steps
Switch-Onto-Fault
CLOEND, 52AEND:
OFF, 0.000–16000 cycles, 0.125 cycle steps
SOTFD:
0.500–16000 cycles, 0.125 cycle steps
Synchronism-Check Timers
TCLSBK1, TCLSBK2:
1.00–30.00 cycles, 0.25 cycle steps
Station DC Battery System Monitor Specifications
Operating Range:
0–350 Vdc
Input Sampling Rate:
DC1: 2 kHz
DC2: 1 kHz
Processing Rate:
1/8 cycle