GE Multilin L60, Инструкция по эксплуатации

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GE Multilin L60 Line Phase Comparison System 5-101
5 SETTINGS 5.3 SYSTEM SETUP
5
5.3.3 SIGNAL SOURCES
PATH: SETTINGS

SYSTEM SETUP

SIGNAL SOURCES

SOURCE 1(2)
Identical menus are available for each source. The "SRC 1" text can be replaced by with a user-defined name appropriate
for the associated source.
The first letter in the source identifier represents the module slot position. The number directly following this letter repre-
sents either the first bank of four channels (1, 2, 3, 4) called “1” or the second bank of four channels (5, 6, 7, 8) called “5” in
a particular CT/VT module. See the
Introduction to AC Sources section at the beginning of this chapter for details on this
concept.
It is possible to select the sum of all CT combinations. The first channel displayed is the CT to which all others will be
referred. For example, the selection “F1+F5” indicates the sum of each phase from channels “F1” and “F5”, scaled to
whichever CT has the higher ratio. Selecting “None” hides the associated actual values.
The approach used to configure the AC sources consists of several steps; first step is to specify the information about each
CT and VT input. For CT inputs, this is the nominal primary and secondary current. For VTs, this is the connection type,
ratio and nominal secondary voltage. Once the inputs have been specified, the configuration for each source is entered,
including specifying which CTs are summed together.
When two CTs are connected and configured with these settings, it is imperative that the CT rated secondary cur-
rent is identical for both CTs (that is, both CTs are 1 A rated or both CTs are 5 A rated).
User selection of AC parameters for comparator elements:
CT/VT modules automatically calculate all current and voltage parameters from the available inputs. Users must select the
specific input parameters to be measured by every element in the relevant settings menu. The internal design of the ele-
ment specifies which type of parameter to use and provides a setting for source selection. In elements where the parameter
may be either fundamental or RMS magnitude, such as phase time overcurrent, two settings are provided. One setting
specifies the source, the second setting selects between fundamental phasor and RMS.

SOURCE 1

SOURCE 1 NAME:
SRC 1
Range: up to six alphanumeric characters
MESSAGE
SOURCE 1 PHASE CT:
None
Range: None, F1, F5, F1+F5,... up to a combination of
any 6 CTs. Only Phase CT inputs are displayed.
MESSAGE
SOURCE 1 GROUND CT:
None
Range: None, F1, F5, F1+F5,... up to a combination of
any 6 CTs. Only Ground CT inputs are displayed.
MESSAGE
SOURCE 1 PHASE VT:
None
Range: None, F5
Only phase voltage inputs will be displayed.
MESSAGE
SOURCE 1 AUX VT:
None
Range: None, F5
Only auxiliary voltage inputs will be displayed.
Table 5–13: SOURCE CONFIGURATION FOR PHASE COMPARISON
FUNCTION CT/VT MODULE 1 (TYPE 8P) CT/VT MODULE 2 (TYPE 8F)
SRC 1 SRC 2 SRC 3 SRC 4
Phase current F1 to F3 CT channels
(used for 87PC first current
and Breaker Failure 1)
Not available L1 to L3 CT channels
(used for 87PC second
current and Breaker
Failure 2). This source is
configurable only if a
second CT/VT module is
ordered.
Sum of F1:F3 and L1:L3
(used for distance and
overcurrent)
Ground current F1 (Ground overcurrent) Not available --- ---
Phase voltage Not available Not available --- Three-phase line VT for
distance and
synchrocheck
Auxiliary voltage Not available Not available Single-phase bus VT for
synchrocheck
---
NOTE