GE F650 Instruction Manual page 279

5.6 INPUTS/OUTPUTS
Table 5–107: SUPERVISION ALGORITHM WITH DOUBLE VOLTAGE SUPERVISION SCHEME
STATUS OF INVOLVED ELEMENTS
CIRCUIT OUTPUT
STATUS STATUS
(F35-F36)
Healthy Open
Healthy Open
Healthy Closed
Healthy Closed
Defective Open
Defective Open
Defective Closed
Defective Closed
There is a possibility to monitor the trip circuit continuity not only via its auxiliary contact 52/a, but also with auxiliary contact
52/b. This avoids the need to install a resistance in parallel with auxiliary 52/a. The correct connection is shown on Figure
5–40:
The circuit works in a similar way to the one described in the previous section, but it uses both supervision inputs F15-F16
and F17-F18.
The advantage in this case is that circuit supervision with 52 open is more complete, as input V 52/b is used through
contact 52/b, (that is closed when the breaker is open).
5
We must point out that in this scheme, the tripping contact, shown in the example as the F650 trip relay, can be the one in
the relay (terminals F35 and F36), or be provided by another protection or by the parallel of several protections. This
provides high flexibility in the use of this circuit.
The battery voltage can also be monitored, by using one of the standard digital inputs.
5-132
INPUTS TO 650
BREAKER STATUS OPERAND
CONT IP_X_CC11
(VA_COIL2)
V 52/A (F15-F16)
52 closed ON
52 open ON
52 closed OFF
52 open OFF
52 closed OFF
52 open OFF
52 closed OFF
52 open OFF
F650 Digital Bay Controller
DECISION
OPERAND OPERAND
CONT IP_X_CC12 CONT IP_X_CC16
(VB_COIL2) (SUP_COIL2)
V 52/B (F17-F18)
OFF ON
ON ON
OFF ON (if t < 500 ms)
OFF (if t > 500 ms)
ON ON (if t < 500 ms)
OFF (if t > 500 ms)
OFF OFF (500 ms delay)
OFF OFF (500 ms delay)
OFF OFF (500 ms delay)
OFF OFF (500 ms delay)
5 SETTINGS
GEK-106310AB