Schweitzer Engineering Laboratories SEL-351 - Page 387

SETTINGS SHEET Page 7 of 24
FOR THE SEL-351 RELAY Date
RELAY SETTINGS (SERIAL PORT COMMAND SET AND FRONT PANEL)
Date Code 20001006
(If channel IN is rated 0.05 A nominal, then setting option “I” is not available for setting ORDER. If
the voltage inputs are delta-connected, then setting option “V” is not available for setting ORDER.)
(Make setting 50P32P if preceding enable settings E32 = Y or AUTO and ELOAD = N)
Phase directional element 3-phase current pickup
(0.50 - 10.00 A {5 A nom.}, 0.10 - 2.00 A {1 A nom.})
50P32P =
(Make settings Z2F, Z2R, 50QFP, 50QRP, a2 and k2 if preceding enable setting E32 = Y. If E32 =
AUTO, these settings are made automatically)
Forward directional Z2 threshold
(-64.00 - 64.00 W secondary {150 V voltage inputs; 5 A nom.})
(-320.00 - 320.00 W secondary {150 V voltage inputs; 1 A nom.})
(-128.00 - 128.00 W secondary {300 V voltage inputs; 5 A nom.})
(-640.00 - 640.00 W secondary {300 V voltage inputs; 1 A nom.})
Z2F =
Reverse directional Z2 threshold
(-64.00 - 64.00 W secondary {150 V voltage inputs; 5 A nom.})
(-320.00 - 320.00 W secondary {150 V voltage inputs; 1 A nom.})
(-128.00 - 128.00 W secondary {300 V voltage inputs; 5 A nom.})
(-640.00 - 640.00 W secondary {300 V voltage inputs; 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
(0.25 - 5.00 A {5 A nom.}, 0.05 - 1.00 A {1 A nom.})
50GFP =
Reverse directional residual ground pickup
(0.25 - 5.00A{5 A nom.}, 0.05 - 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. If E32 = AUTO and ORDER contains V, these settings are made automatically)
Forward directional Z0 threshold
(-64.00 - 64.00 W secondary {150 V voltage inputs; 5 A nom.})
(-320.00 - 320.00 W secondary {150 V voltage inputs; 1 A nom.})
(-128.00 - 128.00 W secondary {300 V voltage inputs; 5 A nom.})
(-640.00 - 640.00 W secondary {300 V voltage inputs; 1 A nom.})
Z0F =
Reverse directional Z0 threshold
(-64.00 - 64.00 W secondary {150 V voltage inputs; 5 A nom.})
(-320.00 - 320.00 W secondary {150 V voltage inputs; 1 A nom.})
(-128.00 - 128.00 W secondary {300 V voltage inputs; 5 A nom.})
(-640.00 - 640.00 W secondary {300 V voltage inputs; 1 A nom.})
Z0R =
Courtesy of NationalSwitchgear.com