Breaker Control - GE G30 Instruction Manual

CHAPTER 4: INTERFACES
The phasor sources are configured under Settings > System Setup > Signal Sources. The tables to display the actual
values are configured in the software under Settings > Product Setup > Graphical Panel > Metering Editor.

4.2.9 Breaker control

The G30 can interface with associated circuit breakers. In many cases the application monitors the state of the breaker,
that can be presented on front panel LEDs, along with a breaker trouble indication. Breaker operations can be manually
initiated from the front panel keypad or automatically initiated from a FlexLogic operand. A setting is provided to assign
names to each breaker; this user-assigned name is for the display of related flash messages. These features are provided
for two breakers; the user can use only those portions of the design relevant to a single breaker, which must be breaker 1.
It is assumed in the following discussion that the
setting is "Enabled" for each breaker.
FUNCTION
4.2.9.1 Control mode selection and monitoring
Installations can require that a breaker be 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
position. 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 that the
setting is "Enabled" for each breaker.
1(2) PUSH BUTTON CONTROL
4.2.9.2 Front panel (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.
4.2.9.3 Control of two breakers
For the following setup example, the (Name) field represents the user-programmed variable name.
For this example, the relay is connected and programmed for both breaker 1 and breaker 2. The
selection of which breaker is to be operated by the
the key manually opens the breaker.
USER 3
G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 4-63: Metered actual values
SETTINGS  SYSTEM SETUP  BREAKERS  BREAKER 1(2)  BREAKER
SETTINGS  SYSTEM SETUP  BREAKERS  BREAKER 1(2)  BREAKER
and keys. The
USER 2 USER 3
FRONT PANEL INTERFACE
key performs the
USER 1
key manually closes the breaker, and
USER 2
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