Date _______________
Date Code 20080213 Instruction Manual SEL-351A Relay
SET.9
of 32
SEL-351A Settings Sheets
Relay Settings (Serial Port Command SET and Front Panel)
Reverse directional Z2 threshold
(–128.00 to +128.00 Ω secondary {5 A nom.})
(–640.00 to +640.00 Ω secondary {1 A nom.})
Z2R =
Forward directional negative-sequence current pickup
(0.25–5.00 A {5 A nom.}, 0.05–1.00 A {1 A nom.})
50QFP =
Reverse directional negative-sequence current pickup
(0.25–5.00 A {5 A nom.}, 0.05–1.00 A {1 A nom.})
50QRP =
Positive-sequence current restraint factor, I2/I1
(0.02–0.50, unitless)
a2 =
Zero-sequence current restraint factor, I2/I0
(0.10–1.20, unitless)
k2 =
(Make settings 50GFP, 50GRP, and a0 if preceding enable setting E32 = Y and preceding setting ORDER contains V or I. If
E32 = AUTO and ORDER contains V or I, these settings are made automatically.)
Forward directional residual-ground pickup
(0.05–5.00 A {5 A nom.}, 0.01–1.00 A {1 A nom.})
50GFP =
Reverse directional residual-ground pickup
(0.05–5.00 A {5 A nom.}, 0.01–1.00 A {1 A nom.})
50GRP =
Positive-sequence current restraint factor, I0/I1
(0.02–0.50, unitless)
a0 =
(Make settings Z0F and Z0R if preceding enable setting E32 = Y and preceding setting ORDER contains V or S. If E32 =
AUTO and ORDER contains V or S, these settings are made automatically.)
Forward directional Z0 threshold
(–128.00 to +128.00 Ω secondary {5 A nom.})
(–640.00 to +640.00 Ω secondary {1 A nom.})
Z0F =
Reverse directional Z0 threshold
(–128.00 to +128.00 Ω secondary {5 A nom.})
(–640.00 to +640.00 Ω secondary {1 A nom.})
Z0R =
(Make settings Z0MTA if [E32 = Y or AUTO] and [ORDER contains V or S].
Zero-Sequence Maximum Torque angle (–90 to –5.00 and 5.00
to 90 degrees)
Z0MTA =
(Make settings 50NFP, 50NRP, and a0N if [E32 = Y or AUTO] and [ORDER contains U or S].
Forward Directional IN Pickup (0.005–5.000 A) 50NFP =
Reverse Directional IN Pickup (0.005–5.000 A)
50NRP =
Positive-Sequence Restraint Factor, IN/I1
(0.001–0.500, unitless)
a0N =
Wattmetric Element Settings (Petersen Coil Grounded System; see Directional
Control Settings (Not in SEL-351A-1) on page 4.38)
(Make settings 59RES, 32WFP, 32WRP, and 32WD if [E32 = Y or AUTO] and [ORDER contains P].)
Wattmetric 3V0 Overvoltage Pickup
(1.00–430.00 V secondary)
59RES =
Courtesy of NationalSwitchgear.com
To Next Page
Loading...