
GE Multilin
N60 Network Stability and Synchrophasor Measurement System
5-127
5 SETTINGS
5.5 GROUPED ELEMENTS
5
5.5.6 SUPERVISING ELEMENTS
a) OPEN POLE DETECTOR
PATH: SETTINGS
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GROUPED ELEMENTS
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SETTING GROUP 1(6)
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SUPERVISING ELEMENTS
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OPEN POLE DETECTOR
The open pole detector is designed to detect if any pole of the associated circuit breaker is opened or the conductor is bro-
ken on the protected power line and cable. The output FlexLogic™ operands can be used in three-pole and single-pole trip-
ping schemes, in reclosing schemes, in blocking some elements (like CT failure), and in signaling or indication schemes. In
single-pole tripping schemes, if
OPEN POLE
flag is set, any other subsequent fault should cause a three-phase trip regard-
less of fault type.
The open pole detector logic is built on detecting absence of current in one phase during presence of current in other
phases. Phases A, B and C breaker auxiliary contacts (if available) are used in addition to make a logic decision for single-
pole tripping applications. If voltage input is available, a low voltage function is used to detect absence of the monitoring
voltage in the associated pole of the breaker.
•
OPEN POLE FUNCTION
: This setting is used to enable/disable operation of the element.
•
OPEN POLE BLOCK
: This setting is used to select a FlexLogic™ operand that blocks operation of the element.
•
OPEN POLE CURRENT SOURCE
: This setting is used to select the source for the current for the element.
•
OPEN POLE CURRENT PICKUP
: This setting is used to select the pickup value of the phase current. The pickup set-
ting is the minimum of the range and likely to be somewhat above of the charging current of the line.
OPEN POLE DETECTOR
OPEN POLE FUNCTION:
Disabled
Range: Disabled, Enabled
MESSAGE
OPEN POLE BLOCK:
Off
Range: FlexLogic™ operand
MESSAGE
OPEN POLE CURRENT
SOURCE: SRC 1
Range: SRC 1, SRC 2
MESSAGE
OPEN POLE CURRENT
PKP: 0.20
pu
Range: 0.05 to 20.00 pu in steps of 0.01
MESSAGE
OPEN POLE BROKEN
CONDUCTOR: Disabled
Range: Disabled, Enabled
MESSAGE
OPEN POLE VOLTAGE
INPUT: Disabled
Range: Disabled, Enabled
MESSAGE
OPEN POLE VOLTAGE
SOURCE: SRC 1
Range: SRC 1, SRC 2
MESSAGE
OPEN POLE
φ
A AUX CO:
Off
Range: FlexLogic™ operand
MESSAGE
OPEN POLE
φ
B AUX CO:
Off
Range: FlexLogic™ operand
MESSAGE
OPEN POLE
φ
C AUX CO:
Off
Range: FlexLogic™ operand
MESSAGE
OPEN POLE PICKUP
DELAY: 0.060
s
Range: 0.000 to 65.535 s in steps of 0.001
MESSAGE
OPEN POLE RESET
DELAY: 0.100
s
Range: 0.000 to 65.535 s in steps of 0.001
MESSAGE
OPEN POLE TARGET:
Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
OPEN POLE EVENTS:
Disabled
Range: Disabled, Enabled