GE UR Series C70, Instruction Manual

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GE Multilin C70 Capacitor Bank Protection and Control System 4-23
4 HUMAN INTERFACES 4.3 FACEPLATE INTERFACE
4
The MESSAGE keys navigate through the subgroups. The VALUE keys scroll increment or decrement numerical setting
values when in programming mode. These keys also scroll through alphanumeric values in the text edit mode. Alterna-
tively, values may also be entered with the numeric keypad.
The decimal key initiates and advance to the next character in text edit mode or enters a decimal point. The HELP key may
be pressed at any time for context sensitive help messages. The ENTER key stores altered setting values.
4.3.6 BREAKER CONTROL
a) INTRODUCTION
The C70 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 1.
For the following discussion it is assumed the
SETTINGS
ÖØ
SYSTEM SETUP
ÖØ
BREAKERS
Ö
BREAKER 1(2)
Ö
BREAKER
FUNCTION
setting is "Enabled" for each breaker.
b) CONTROL MODE SELECTION AND 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 three-pole, a single input tracks the breaker open or closed posi-
tion. If the mode is selected as one-pole, all three breaker pole states must be input to the relay. These inputs must be in
agreement to indicate the position of the breaker.
For the following discussion it is assumed the
SETTINGS
ÖØ
SYSTEM SETUP
ÖØ
BREAKERS
Ö
BREAKER 1(2)
ÖØ
BREAKER
1(2) PUSH BUTTON CONTROL
setting is “Enabled” for each breaker.
c) FACEPLATE (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.
d) CONTROL OF TWO BREAKERS
For the following example setup, the
(Name)
field represents the user-programmed variable name.
For this application (setup shown below), the relay is connected and programmed for both breaker 1 and breaker 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.