Date _______________
Date Code 20080213 Instruction Manual SEL-351A Relay
SET.11
of 32
SEL-351A Settings Sheets
Relay Settings (Serial Port Command SET and Front Panel)
Phase-to-phase undervoltage pickup
(OFF, 0.00–300.00 V secondary)
27PP =
Phase-to-phase undervoltage pickup
(OFF, 0.00–300.00 V secondary)
27PP2P =
Phase-to-phase overvoltage pickup
(OFF, 0.00–300.00 V secondary)
59PP =
Phase-to-phase overvoltage pickup
(OFF, 0.00–300.00 V secondary)
59PP2P =
Synchronism Check Elements (See Figure 3.27 and Figure 3.28)
(Make the following settings if preceding enable setting E25 = Y.)
Voltage window—low threshold (0.00–300.00 V secondary) 25VLO =
Voltage window—high threshold (0.00–300.00 V secondary)
25VHI =
Maximum slip frequency (0.005–0.500 Hz)
25SF =
Maximum angle 1 (0.00°–80.00°)
25ANG1 =
Maximum angle 2 (0.00°–80.00°)
25ANG2 =
Synchronizing phase
(Global setting PTCONN = WYE: VA, VB, VC or 0° to 330°
in 30° steps; degree option is for VS not in phase with VA,
VB, or VC—set with respect to VS constantly lagging VA)
(Global setting PTCONN = DELTA: VAB, VBC, VCA or 0°
to 330° in 30° steps; degree option is for VS not in phase
with VAB, VBC, or VCA—set with respect to VS
constantly lagging VAB)
SYNCP =
Breaker close time for angle compensation
(0.00–60.00 cycles in 0.25-cycle steps)
TCLOSD =
Frequency Element (See Figure 3.30–Figure 3.32)
(Make the following settings if preceding enable setting E81 = 1–6.)
Phase undervoltage block (25.00–300.00 V secondary) 27B81P =
Level 1 pickup (OFF, 40.10–65.00 Hz)
81D1P =
Level 1 time delay (2.00–16000.00 cycles in 0.25-cycle steps)
81D1D =
Level 2 pickup (OFF, 40.10–65.00 Hz)
81D2P =
Level 2 time delay (2.00–16000.00 cycles in 0.25-cycle steps)
81D2D =
Level 3 pickup (OFF, 40.10–65.00 Hz)
81D3P =
Level 3 time delay (2.00–16000.00 cycles in 0.25-cycle steps)
81D3D =
Level 4 pickup (OFF, 40.10–65.00 Hz)
81D4P =
Level 4 time delay (2.00–16000.00 cycles in 0.25-cycle steps)
81D4D =
Level 5 pickup (OFF, 40.10–65.00 Hz)
81D5P =
Courtesy of NationalSwitchgear.com
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