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Breaker Control - GE UR Series Instruction Manual

Line differential relay.
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4 HUMAN INTERFACES
The L90 can interface with associated circuit breakers. In many cases the application monitors the state of the breaker,
which can be presented on faceplate LEDs, along with a breaker trouble indication. Breaker operations can be manually
initiated from faceplate keypad or automatically initiated from a FlexLogic™ operand. A setting is provided to assign names
to each breaker; this user-assigned name is used for the display of related flash messages. These features are provided for
two breakers; the user may use only those portions of the design relevant to a single breaker, which must be breaker No. 1.
For the following discussion it is assumed the
setting is "Enabled" for each breaker.
TION
a) CONTROL MODE SELECTION & MONITORING
Installations may require that a breaker is operated in the three-pole only mode (3-Pole), or in the one and three-pole (1-
Pole) mode, selected by setting. If the mode is selected as 3-pole, a single input tracks the breaker open or closed position.
If the mode is selected as 1-Pole, all three breaker pole states must be input to the relay. These inputs must be in agree-
ment to indicate the position of the breaker.
For the following discussion it is assumed the
setting is "Enabled" for each breaker..
PUSH BUTTON CONTROL
b) FACEPLATE PUSHBUTTON (USER KEY) CONTROL
After the 30 minute interval during which command functions are permitted after a correct command password, the user
cannot open or close a breaker via the keypad. The following discussions begin from the not-permitted state.
c) CONTROL OF TWO BREAKERS
For the following example setup, the symbol "(Name)" represents the user-programmed variable name.
NOTE
For this application (setup shown below), the relay is connected and programmed for both breaker No. 1 and breaker No. 2.
The USER 1 key performs the selection of which breaker is to be operated by the USER 2 and USER 3 keys. The USER 2
key is used to manually close the breaker and the USER 3 key is used to manually open the breaker.
ENTER COMMAND
PASSWORD
Press USER 1
To Select Breaker
BKR1-(Name) SELECTED
USER 2=CLS/USER 3=OP
(1)
USER 2 OFF/ON
To Close BKR1-(Name)
(2)
USER 3 OFF/ON
To Open BKR1-(Name)
(3)
BKR2-(Name) SELECTED
USER 2=CLS/USER 3=OP
GE Power Management
ÖØ
SETTINGS
SYSTEM SETUP
ÖØ
SETTINGS
This message appears when the USER 1, USER 2, or USER 3 key is pressed and a
is required; i.e. if
COMMAND PASSWORD
mands have been issued within the last 30 minutes.
This message appears if the correct password is entered or if none is required. This mes-
sage will be maintained for 30 seconds or until the USER 1 key is pressed again.
This message is displayed after the USER 1 key is pressed for the second time. Three
possible actions can be performed from this state within 30 seconds as per items (1), (2)
and (3) below:
If the USER 2 key is pressed, this message appears for 20 seconds. If the USER 2 key is
pressed again within that time, a signal is created that can be programmed to operate an
output relay to close breaker No. 1.
If the USER 3 key is pressed, this message appears for 20 seconds. If the USER 3 key is
pressed again within that time, a signal is created that can be programmed to operate an
output relay to open breaker No. 1.
If the USER 1 key is pressed at this step, this message appears showing that a different
breaker is selected. Three possible actions can be performed from this state as per (1),
(2) and (3). Repeatedly pressing the USER 1 key alternates between available breakers.
Pressing keys other than USER 1, 2 or 3 at any time aborts the breaker control function.
L90 Line Differential Relay
4.2 FACEPLATE INTERFACE
ÖØ
Ö
BREAKERS
ÖØ
SYSTEM SETUP
BREAKERS
COMMAND PASSWORD

4.2.7 BREAKER CONTROL

Ö
BREAKER n
BREAKER FUNC-
Ö
ÖØ
BREAKER n
BREAKER
is enabled and no com-
4-9
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L90

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