GE D60 Instruction Manual page 269

5 SETTINGS
e) OPEN POLE DETECTOR
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PATH: SETTINGS CONTROL ELEMENTS
# OPEN POLE
#
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
The open pole detector is intended to identify an open pole of the line circuit breaker. The scheme monitors the breakers
auxiliary contacts, current in the circuit and optionally voltage on the line. The scheme generates output operands used to
block the phase selector and some specific protection elements, thus preventing maloperation during the dead time of a
single pole autoreclose cycle or any other open pole conditions. The scheme declares an open pole at the moment a sin-
gle-pole trip is issued.
In two breaker and breaker and a half applications, an open pole condition is declared when:
• both breakers have an open pole on the same phase or
• the current on the line drops below a threshold or
• the current and voltage on the line drop below a threshold.
The Open Pole feature uses signals defined by the
setting. Voltage supervision can be used only with wye VTs on the line side of the breaker(s).
SOURCE
The
OPEN POLE CURRENT PICKUP
The setting specifies positive-sequence reactance of the entire line. If shunt reactors are applied, this
OPEN POLE LINE XC1
value should be a net capacitive reactance of the line and the reactors installed between the line breakers. The value is
entered in secondary ohms. This setting is relevant if open pole condition at the remote end of the line is to be sensed and
utilized by the relay ().
The setting specifies zero-sequence reactance of the entire line. If shunt reactors are applied, this
OPEN POLE LINE XC0
value should be a net capacitive reactance of the line and the reactors installed between the line breakers. The value shall
be entered in secondary ohms. This setting is relevant if open pole condition at the remote end of the line is to be sensed
and utilized by the relay (
OPEN POLE REM OP
The
OPEN POLE REM CURR PKP
current compensated by the calculated charging current. The latter is calculated based on the local voltages and the capac-
itive reactances of the line. This setting is relevant if open pole condition at the remote end of the line is to be sensed and
utilized by the relay (
OPEN POLE REM OP
For convenience, the position of the breaker poles defined in the Breaker Control feature and available as FlexLogic™
operand BREAKER 1/2 ΦA CLSD
For correct operation of the Open Pole Detector, the Breaker Control, Trip Output, and Single Pole Autoreclose features
GE Multilin
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MONITORING ELEMENTS
OPEN POLE FUNCTION:
Disabled
OPEN POLE BLOCK:
Off
OPEN POLE VOLTAGE
SUPV: Disabled
OPEN POLE CURRENT
PKP: 0.050 pu
OPEN POLE LINE XC1:
9999.9 Ω
OPEN POLE LINE XC0:
9999.9 Ω
OPEN POLE REM CURR
PKP: 0.050 pu
OPEN POLE TARGET:
Self-Reset
OPEN POLE EVENTS:
Disabled
GROUPED ELEMENTS
setting establishes the current threshold below which an open pole is declared.
FlexLogic™ operand).
setting specifies pickup level for the remote-end current estimated by the relay as the local
FlexLogic™ operand).
through BREAKER 1/2 ΦC CLSD
D60 Line Distance Relay
5.6 CONTROL ELEMENTS
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OPEN POLE
Range: Disabled, Enabled
Range: FlexLogic™ operand
Range: Disabled, Enabled
Range: 0.000 to 30.000 pu in steps of 0.001
Range: 300.0 to 9999.9
Range: 300.0 to 9999.9
Range: 0.000 to 30.000 pu in steps of 0.001
Range: Self-Reset, Latched, Disabled
Range: Enabled, Disabled
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SETTING GROUP 1(6)
and are used by the Open Pole feature.
BREAKER 1/2 OOS
Ω
in steps of 0.001
Ω
in steps of 0.001
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DISTANCE DISTANCE
5-185
5