GE D60 Instruction Manual page 385

5 SETTINGS
e) OPEN POLE DETECTOR
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PATH: SETTINGS CONTROL ELEMENTS
 OPEN POLE

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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 single-pole trip is issued.
In two-breaker and breaker-and-a-half applications, an open pole condition is declared when one or more of the following
hold:
• Both breakers have an open pole on the same phase.
• The current on the line drops below a threshold.
• 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.
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
GE Multilin

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 MODE:
Accelerated
OPEN POLE DETECTION:
I AND V AND CBaux
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).
D60 Line Distance Protection System
5.7 CONTROL ELEMENTS

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 ohms in steps of 0.001
Range: 300.0 to 9999.9 ohms in steps of 0.001
Range: 0.000 to 30.000 pu in steps of 0.001
Range: Accelerated, Traditional
Range: I AND V AND CBaux, I AND V only
Range: Self-Reset, Latched, Disabled
Range: Enabled, Disabled
 
SETTING GROUP 1(6)
5

DISTANCE DISTANCE
5-251