9.34
SEL-311C Relay Instruction Manual Date Code 20060320
Setting the Relay
Settings Explanations
If the same length of line is measured in kilometers rather than miles, then
enter:
LL = 24.14 (kilometers)
Enable Settings
Refer to Relay Settings (Serial Port Command SET and Front Panel) on
page SET.1 and Breaker Monitor Settings (See Breaker Monitor on page 8.2)
on page SET.23.
The enable settings on Relay Settings (Serial Port Command SET and Front
Panel) (E21P–EADVS) control the settings that follow, through Setting
Sheet 15. Enable setting, EBMON, on Settings Sheet 23 controls the settings
that immediately follow it. This helps limit the number of settings that need to
be made.
Each setting subgroup on Settings Sheets 2–15 has a reference back to the
controlling enable setting. For example, the residual time-overcurrent element
settings on Settings Sheet 8 (settings 51GP through 51GRS) are controlled by
enable setting E51G.
Other System
Parameters
Refer to Global Settings (Serial Port Command SET G and Front Panel) on
page SET.22.
The global settings NFREQ and PHROT allow you to configure the
SEL-311C to your specific system.
Set NFREQ equal to your nominal power system frequency, either 50 Hz or
60 Hz.
Set PHROT equal to your power system phase rotation, either ABC or ACB.
Set DATE_F to format the date displayed in relay reports and the front-panel
display. Set DATE_F to MDY to display dates in Month/Day/Year format; set
DATE_F to YMD to display dates in Year/Month/Day format.
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