14.47
Date Code 20060320 Instruction Manual SEL-311C Relay
Application Settings for SEL-221 Series Relays
SEL-221-16 to SEL-311C Settings Conversion Guide
SEL-221-16 to SEL-311C Settings Conversion Guide
Set APP = 221-16 in the SEL-311C to configure the relay to closely
approximate the features, performance, and settings of an SEL-221-16. When
APP = 221-16, the SEL-311C:
1. Configures itself as a phase and ground distance relay with
ground directional overcurrent elements, and reclosing
functions.
2. Configures contact inputs and outputs to emulate those in an
SEL-221-16.
3. Presents the user only with those settings associated with
SEL-221-16 type features.
4. Automatically calculates all other settings required to simulate
an SEL-221-16.
If additional capability is needed (e.g., M
IRRORED BITS or SELOGIC control
equations), the relay may be returned to the setting APP = 311C to make all of
the SEL-311C settings visible. It is important to remember that changing from
APP = 311C to APP = 221-16 changes settings in the relay. Changing from
APP = 221-16 to APP = 311C makes more SEL-311C settings visible. The
only settings that are modified are ESV, ELAT, and EDP. These three settings
are set to their maximum value of 16 so that no hidden settings are modified.
If SEL-311C functions are used after setting APP is changed from 221-16 to
311C, do not change setting APP back to 221-16.
As described above, when setting APP = 221-16, the user is presented only
with SEL-311C settings associated with the features found in an SEL-221-16.
This section explains how to make those remaining SEL-311C settings
directly from the settings used in an SEL-221-16.
There are mainly two kinds of settings in the SEL-311C, relay settings and
SEL
OGIC settings. Relay settings are settings for protective elements.
SEL
OGIC settings are Boolean expressions used to customize the logic of the
SEL-311C. To set the SEL-311C to emulate an SEL-221-16, follow these four
steps:
Step 1. Turn on the SEL-221-16 application setting by making setting
APP = 221-16. See Application Settings on page 14.48.
Step 2. Convert the appropriate SEL-221-16 settings to SEL-311C
settings using the simple equations shown in Table 14.28. Be
sure to convert from primary quantities (SEL-221-16 settings)
to secondary quantities (SEL-311C settings). See
Convert SEL-221-16 Primary Quantities to SEL-311C
Secondary Quantities on page 14.48.
Step 3. For each Mask Logic setting in the SEL-221-16 shown in
Table 14.29, create an equivalent SEL
OGIC control equation
using the logical OR of each bit asserted in the mask, as shown
in Table 14.30.
Step 4. Test the relay to verify intended performance.
The remainder of this section shows how to perform Step 1 through Step 3
above, and also gives an example of Step 3.
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