Schweitzer Engineering Laboratories SEL-351A - SEL-351 A Settings Sheets

Date Code 20080213 Instruction Manual SEL-351A Relay
Date _______________ SET.1
of 32
SEL-351A Settings Sheets
Relay Settings (Serial Port Command SET and Front Panel)
SEL-351A Settings Sheets
Relay Settings (Serial Port Command SET and Front
Panel)
To avoid lost settings, enter global settings first [Global Settings (Serial Port Command SET G and
Front Panel) on page SET.20] if global settings PTCONN or VSCONN are going to be changed. Refer
to subsection In Some Applications, Make Global Settings (SET G) First on page 9.1.
Identifier Labels (See Settings Explanations on page 9.34)
Relay Identifier (30 characters)
RID =
Terminal Identifier (30 characters)
TID =
Current and Potential Transformer Ratios
(See Settings Explanations on page 9.34)
Phase (IA, IB, IC) Current Transformer Ratio (1–6000) CTR =
Neutral (IN) Current Transformer Ratio (1–10000)
CTRN =
Phase (VA, VB, VC; wye-connected) or Phase-to-Phase
(VAB, VBC, VCA; delta-connected) Potential Transformer
Ratio (1.00–10000.00)
PTR =
Synchronism Voltage (VS) Potential Transformer Ratio
(1.00–10000.00)
PTRS =
PT Nominal Voltage (line-to-neutral {wye-connected} or line-
to-line {delta-connected}) (OFF, 25.00–300.00 V secondary)
VNOM =
Line Settings (See Settings Explanations on page 9.34)
Positive-sequence line impedance magnitude
(0.10–510.00 Ω secondary {5 A nom.})
(0.50–2550.00 Ω secondary {1 A nom.})
Z1MAG =
Positive-sequence line impedance angle (5.00–90.00 degrees)
Z1ANG =
Zero-sequence line impedance magnitude
(0.10–510.00 Ω secondary {5 A nom.})
(0.50–2550.00 Ω secondary {1 A nom.})
Z0MAG =
Zero-sequence line impedance angle (5.00–90.00 degrees)
Z0ANG =
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