GE D60, Инструкция по эксплуатации

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5-266 D60 Line Distance Protection System GE Multilin
5.7 CONTROL ELEMENTS 5 SETTINGS
5
The trip output element is primarily used to collect trip requests from protection elements and other inputs to generate out-
put operands to initiate trip operations. Three pole trips will only initiate reclosure if programmed to do so, whereas single
pole trips will always automatically initiate reclosure. The
TRIP 3-POLE
and
TRIP 1-POLE
output operands can also be used
as inputs to a FlexLogic
OR
gate to operate the faceplate Trip indicator LED.
THREE POLE OPERATION:
In applications where single-pole tripping is not required this element provides a convenient method of collecting inputs to
initiate tripping of circuit breakers, the reclose element and breaker failure elements.
SINGLE POLE OPERATION:
This element must be used in single pole operation applications.
In these applications this element is used to:
• Determine if a single pole operation should be performed.
• Collect inputs to initiate three pole tripping, the recloser and breaker failure elements.
• Collect inputs to initiate single pole tripping, the recloser and breaker failure elements.
• Assign a higher priority to pilot aided scheme outputs than to exclusively local inputs.
The trip output element works in association with other D60 elements (see the Theory of Operation chapter for a complete
description of single-pole operations) that must be programmed and in-service for successful operation. The necessary ele-
ments are: recloser, breaker control, open pole detector, and phase selector. The recloser must also be in the “Reset” state
before a single pole trip can be issued. Outputs from this element are also directly connected as initiate signals to the
breaker failure elements.
At least one internal protection element or digital input representing detection of a fault must be available as an input to this
element. In pilot-aided scheme applications, a timer can be used to delay the output decision until data from a remote ter-
minal is received from communications facilities, to prevent a three pole operation where a single pole operation is permit-
ted.
To ensure correct operation of the single-pole tripping feature, any non-distance protection used for single pole trip-
ping (such as high-set overcurrent using the instantaneous or directional overcurrent elements) must be blocked by
the
OPEN POLE OP Φ A
,
OPEN POLE OP Φ B
, or
OPEN POLE OP Φ C
operands. For example, instantaneous overcur-
rent phase A will be blocked by
OPEN POLE OP Φ A
operand. This blocking condition is pre-wired for distance pro-
tection.
The following settings are available for the trip output element.
• TRIP MODE : This setting is used to select the required mode of operation. If selected to “3 Pole Only” outputs for all
three phases are always set simultaneously. If selected to “3 Pole & 1 Pole” outputs for all three phases are set simul-
taneously unless the phase selector or a pilot aided scheme determines the fault is single-phase-to-ground. If the fault
is identified as being AG, BG or CG only the operands for the faulted phase will be asserted.
MESSAGE
REVERSE FAULT:
Off
Range: FlexLogic operand
MESSAGE
TRIP DELAY ON EVOLV
FAULTS: 0.000 s
Range: 0 to 65.535 s in steps of 0.001
MESSAGE
BKR Φ A OPEN:
Off
Range: FlexLogic operand
MESSAGE
BKR Φ B OPEN:
Off
Range: FlexLogic operand
MESSAGE
BKR Φ C OPEN:
Off
Range: FlexLogic operand
MESSAGE
TRIP EVENTS:
Disabled
Range: Enabled, Disabled
NOTE
NOTE