Schweitzer Engineering Laboratories SEL-311C - Synchronism Check Elements Settings; Table 3.15 Synchronism Check Elements Settings and Settings Ranges

3.45
Date Code 20060320 Instruction Manual SEL-311C Relay
Distance, Out-of-Step, Overcurrent, Voltage, Synchronism Check, and Frequency Elements
Synchronism Check Elements
Synchronism Check
Elements Settings
Accuracy
Table 3.15 Synchronism Check Elements Settings and Settings Ranges
Setting Definition Range
25VLO low voltage threshold
for “healthy voltage” window
0.00–150.00 V secondary
25VHI high voltage threshold
for “healthy voltage” window
0.00–150.00 V secondary
25SF maximum slip frequency 0.005–0.500 Hz
25ANG1 synchronism check
element 25A1 maximum angle
0°–80°
25ANG2 synchronism check
element 25A2 maximum angle
0°–80°
SYNCP synchronizing phase VA, VB, VC, VAB, VBC, or VCA
TCLOSD breaker close time
for angle compensation
OFF, 1.00–60.00 cycles
BSYNCH SEL
OGIC control equation
that blocks synchronism check
Relay Word bits referenced
in Table 9.5 and Ta bl e 9. 6
Voltage Pickup
±1 V and ±5% of setting
Voltage Transient Overreach
<5% of setting
Slip Pickup
±0.003 Hz
Angle Pickup
±4°