Contact Outputs - GE C60 Instruction Manual

5 SETTINGS
a) DIGITAL OUTPUTS

PATH: SETTINGS INPUTS/OUTPUTS
 CONTACT OUTPUT H1

MESSAGE
MESSAGE
MESSAGE
Upon startup of the relay, the main processor determines from an assessment of the modules installed in the chassis which
contact outputs are available and presents the settings for only these outputs. Where the contact input is non-latching, the
settings are as shown.
An ID may be assigned to each contact output. The signal that can
and (virtual output, element state, contact input, or virtual input). An additional FlexLogic operand may be used to
the relay. Any change of state of a contact output can be logged as an Event if programmed to do so.
For example, the trip circuit current is monitored by providing a current threshold detector in series with some Form-A con-
tacts (see the trip circuit example in the Digital Elements section). The monitor sets a flag (see the specifications for Form-
A). The name of the FlexLogic operand set by the monitor, consists of the output relay designation, followed by the name of
the flag; for example,
CONT OP 1 ION
In most breaker control circuits, the trip coil is connected in series with a breaker auxiliary contact used to interrupt current
flow after the breaker has tripped, to prevent damage to the less robust initiating contact. This can be done by monitoring
an auxiliary contact on the breaker which opens when the breaker has tripped, but this scheme is subject to incorrect oper-
ation caused by differences in timing between breaker auxiliary contact change-of-state and interruption of current in the
trip circuit. The most dependable protection of the initiating contact is provided by directly measuring current in the tripping
circuit, and using this parameter to control resetting of the initiating relay. This scheme is often called trip seal-in.
This can be realized using the
"Cont Op 1"
CONTACT OUTPUT H1 ID:
any suitable FlexLogic operand
OUTPUT H1 OPERATE:
"Cont Op 1 IOn"
OUTPUT H1 SEAL-IN:
CONTACT OUTPUT H1 EVENTS:
Figure 5–117: CONTACT INPUT/OUTPUT MODULE TYPE 6A CONTACT 1 LOGIC
SETTING
CONTACT OUTPUT H1 OPERATE
= On
SETTING
CONTACT OUTPUT H1 SEAL-IN
= On
859743A1.vsd
b) LATCHING OUTPUTS

PATH: SETTINGS INPUTS/OUTPUTS
 CONTACT OUTPUT H1a

MESSAGE
GE Multilin


CONTACT OUTPUTS

CONTACT OUTPUT H1 ID
Cont Op 1
OUTPUT H1 OPERATE:
Off
OUTPUT H1 SEAL-IN:
Off
CONTACT OUTPUT H1
EVENTS: Enabled
.
FlexLogic operand to seal-in the contact output as follows:
CONT OP 1 ION
"Enabled"
OR
AND

CONTACT OUTPUTS
OUTPUT H1a ID
L-Cont Op 1
OUTPUT H1a OPERATE:
Off
C60 Breaker Protection System

CONTACT OUTPUT H1
Range: Up to 12 alphanumeric characters
Range: FlexLogic operand
Range: FlexLogic operand
Range: Disabled, Enabled
a contact output may be any FlexLogic oper-
OPERATE

CONTACT OUTPUT H1a
Range: Up to 12 alphanumeric characters
Range: FlexLogic operand
5.8 INPUTS AND OUTPUTS
5.8.3 CONTACT OUTPUTS
SEAL-IN
FLEXLOGIC OPERAND
Cont Op 1 Closed
Cont Op 1 Ion
Cont Op 1 Von
Cont Op 1 Voff
H1a
H1b
H1c
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