GE D30 User Manual

5-264 D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CONTROL ELEMENTS CHAPTER 5: SETTINGS
5
SELECTOR 1 STEP-UP MODE — This setting defines the selector mode of operation. When set to “Time-out,” the selector
changes its position after a pre-defined period of inactivity at the control input. The change is automatic and does not
require any explicit confirmation of the intent to change the selector's position. When set to “Acknowledge,” the selector
changes its position only after the intent is confirmed through a separate acknowledging signal. If the acknowledging
signal does not appear within a pre-defined period of time, the selector does not accept the change and an alarm is
established by setting the
SELECTOR STP ALARM output FlexLogic operand for three seconds.
SELECTOR 1 ACK — This setting specifies an acknowledging input for the stepping up control input. The pre-selected
position is applied on the rising edge of the assigned operand. This setting is active only under “Acknowledge” mode of
operation. The acknowledging signal must appear within the time defined by the
SELECTOR 1 TIME-OUT setting after the last
activity of the control input. A user-programmable pushbutton is typically configured as the acknowledging input.
SELECTOR 1 3BIT A0, A1, and A2 — These settings specify a three-bit control input of the selector. The three-bit control word
pre-selects the position using the following encoding convention:
The “rest” position (0, 0, 0) does not generate an action and is intended for situations when the device generating the three-
bit control word is having a problem. When
SELECTOR 1 3BIT MODE is “Time-out,” the pre-selected position is applied in
SELECTOR 1 TIME-OUT seconds after the last activity of the three-bit input. When SELECTOR 1 3BIT MODE is “Acknowledge,”
the pre-selected position is applied on the rising edge of the
SELECTOR 1 3BIT ACK acknowledging input.
The stepping up control input (
SELECTOR 1 STEP-UP) and the three-bit control inputs (SELECTOR 1 3BIT A0 through A2) lock-out
mutually: once the stepping up sequence is initiated, the three-bit control input is inactive; once the three-bit control
sequence is initiated, the stepping up input is inactive.
SELECTOR 1 3BIT MODE — This setting defines the selector mode of operation. When set to “Time-out,” the selector changes
its position after a pre-defined period of inactivity at the control input. The change is automatic and does not require
explicit confirmation to change the selector position. When set to “Acknowledge,” the selector changes its position only
after confirmation via a separate acknowledging signal. If the acknowledging signal does not appear within a pre-defined
period of time, the selector rejects the change and an alarm established by invoking the
SELECTOR BIT ALARM FlexLogic operand
for three seconds.
SELECTOR 1 3BIT ACK — This setting specifies an acknowledging input for the three-bit control input. The pre-selected
position is applied on the rising edge of the assigned FlexLogic operand. This setting is active only under the
“Acknowledge” mode of operation. The acknowledging signal must appear within the time defined by the
SELECTOR TIME-
OUT
setting after the last activity of the three-bit control inputs. Note that the stepping up control input and three-bit
control input have independent acknowledging signals (
SELECTOR 1 ACK and SELECTOR 1 3BIT ACK, accordingly).
SELECTOR 1 POWER-UP MODE — This setting specifies the element behavior on power up of the relay.
When set to “Restore,” the last position of the selector (stored in the non-volatile memory) is restored after powering up the
relay. If the position restored from memory is out of range, position 0 (no output operand selected) is applied and an alarm
is set (
SELECTOR 1 PWR ALARM).
When set to “Synchronize,” the selector switch acts as follows. For two power cycles, the selector applies position 0 to the
switch and activates
SELECTOR 1 PWR ALARM. After two power cycles expire, the selector synchronizes to the position
dictated by the three-bit control input. This operation does not wait for time-out or the acknowledging input. When the
synchronization attempt is unsuccessful (that is, the three-bit input is not available (0,0,0) or out of range), then the selector
switch output is set to position 0 (no output operand selected) and an alarm is established (
SELECTOR 1 PWR ALARM).
A2 A1 A0 Position
000rest
0011
0102
0113
1004
1015
1106
1117

GE D30 Specifications

General

Brand	GE
Model	D30
Category	Relays
Language	English