GE C60, Инструкция по эксплуатации

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GE Multilin C60 Breaker Protection System 5-257
5 SETTINGS 5.8 INPUTS AND OUTPUTS
5
5.8.3 CONTACT OUTPUTS
a) DIGITAL OUTPUTS
PATH: SETTINGS

INPUTS/OUTPUTS

CONTACT OUTPUTS

CONTACT OUTPUT H1
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
OPERATE
a contact output may be any FlexLogic oper-
and (virtual output, element state, contact input, or virtual input). An additional FlexLogic operand may be used to
SEAL-IN
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 ION
FlexLogic operand to seal-in the contact output as follows:
CONTACT OUTPUT H1 ID:
“Cont Op 1"
OUTPUT H1 OPERATE:
any suitable FlexLogic operand
OUTPUT H1 SEAL-IN:
“Cont Op 1 IOn”
CONTACT OUTPUT H1 EVENTS:
“Enabled”
Figure 5–117: CONTACT INPUT/OUTPUT MODULE TYPE 6A CONTACT 1 LOGIC
b) LATCHING OUTPUTS
PATH: SETTINGS

INPUTS/OUTPUTS

CONTACT OUTPUTS

CONTACT OUTPUT H1a

CONTACT OUTPUT H1

CONTACT OUTPUT H1 ID
Cont Op 1
Range: Up to 12 alphanumeric characters
MESSAGE
OUTPUT H1 OPERATE:
Off
Range: FlexLogic operand
MESSAGE
OUTPUT H1 SEAL-IN:
Off
Range: FlexLogic operand
MESSAGE
CONTACT OUTPUT H1
EVENTS: Enabled
Range: Disabled, Enabled

CONTACT OUTPUT H1a

OUTPUT H1a ID
L-Cont Op 1
Range: Up to 12 alphanumeric characters
MESSAGE
OUTPUT H1a OPERATE:
Off
Range: FlexLogic operand
FLEXLOGIC OPERAND
Cont Op 1 Closed
SETTING
= On
CONTACT OUTPUT H1 SEAL-IN
OR
SETTING
= On
CONTACT OUTPUT H1 OPERATE
AND
H1a
Cont Op 1 Ion
Cont Op 1 Von
Cont Op 1 Voff
H1b
H1c
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