Basler BE1-CDS220, Instruction Manual

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8-12 Application BE1-CDS220
Integration of Protection, Control, and I/O Elements
The logic equations of Table 8-6 establish the control connections between BASIC-TX scheme elements.
For example, the three underlined logic settings in the equations of Table 8-6 provide the electrical
connection between the 87 element (trip enabled by the settings) and trip outputs 1, 2, and 3. Referring to
Figures 8-3 and 8-4, the 87 protection element trips through outputs 1, 2, and 3. The user can apply any
or all of the outputs. The 151 and 51N protection elements (also trip enabled by the settings) trip through
output 4, while the 251 protective element (also trip enabled by the settings) trips through output 5.
Protection elements set at 0 are setting disabled and will not provide a trip output even if logic enabled.
Control of the active setting group can be manual or automatic. For the BASIC-TX application, setting
group control is programmed for continuous automatic operation because the /0 (not 0), logic 1 is applied
to the AUTO input of the Active Setting Group Control Logic as shown in Figure 8-4. Tables 8-7 through 8-
10 provide detailed logic definitions for the inputs, outputs, protection, and control elements.
Alarms
Three logic variables drive the front panel LEDs: Relay Trouble (ALMREL), Major Alarm (ALMMAJ), and
Minor Alarm (ALMMIN). A fourth logic variable, Logic Alarm (ALMLGC), has no associated front panel
LED. When the relay self-test detects a problem in the relay (ALMREL) as programmed for the BASIC-TX
scheme, the Relay Trouble LED lights, output A operates, and all outputs are disabled. When a Major
Alarm is detected (ALMMAJ), the associated LED lights, and output 6 operates. When a Minor Alarm
(ALMMIN) is detected, the associated LED lights, but in this scheme, no output relay is programmed to
operate.
Table 8-7. BASIC-TX Contact Input Logic
State Labels
Input Purpose Name Label
Closed Open
IN1
Optional input. Used for CT input circuit 1 breaker status
indication in SER reports. TRUE when breaker closed.
BREAKER-1 CLOSED OPEN
IN2
Optional input. Used for CT input circuit 2 breaker status
indication in SER reports. TRUE when breaker closed.
BREAKER-2 CLOSED OPEN
IN3
Optional input. Used for 86 status indication in SER reports.
TRUE when 86 tripped.
86-TRIPPED TRIPPED NORMAL
IN6 - IN8
Optional inputs. Used for programmable alarms and SER
reporting. For example, sudden pressure trip or transformer
hot spot alarm, etc. Drives VO13-VO15 which are
programmable alarm points 21-23. Label inputs as
appropriate.
INPUT_6,
INPUT_7,
INPUT_8
CLOSED OPEN
NOTE
Tables 8-7 through 8-10 provide detailed logic definitions for the inputs, outputs,
protection, and control elements. Only those inputs, logic blocks, virtual switches,
and outputs in use for the BASIC-TX preprogrammed logic are described in the
following Tables.