3 restricted breaker control – GE Industrial Solutions Entellisys 5.0 Administrator Manual User Manual
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4.2.3 Restricted Breaker Control
In systems with certain supervisory control schemes, such as a paralleling gear application, it
may be necessary to deny breaker control from the user or from other Modbus TCP clients.
Using the Restricted Breaker Control feature, a code can be added for open, close and trip
operations for selected breakers. Each function (open/close/trip) can be configured
independently for a selected breaker.
Restricted Operation: (Restricted command enabled)
When Restricted Breaker Control is enabled for an operation on a particular breaker, all normal
command avenues are disabled (except protective relays). The CPU will expect the pre-
configured code to be written to a different register for the respective breaker for open, close or
trip commands. The pre-configured code must match the code entered for the command and
breaker in question in the “Restricted Breaker Control” setting screen. (See
)
For more information about operating breakers from a 3rd party Modbus TCP client, see DEH
502 System Integrator’s guide.
NOTE: Restricted breaker control does NOT interfere with protective relays or FlexLogic and
their ability to operate the breaker.
Enabling Restricted Breaker Control: Restricted Breaker Control is available but disabled by
default. It must be enabled by the factory or a GE Field Service Engineer. Once enabled, the user
controls shown in Figure 4-6 will be available.
Events:
Following events are issued when a restricted breaker receives either a open, close or trip
command.
• Breaker Open/Close/Trip Command Restricted Control Received: CPU acknowledged
that the “SRC X Open/Close/Trip Breaker By Restricted Control” register received the
correct command code.
• Breaker Open/Close/Trip Cmd Restricted Cntrl Incorrect Code: CPU reported that the
“SRC X Open/Close/Trip Breaker By Restricted Control” register received the incorrect
command code.
• Breaker Open/Close/Trip Cmd Restricted Control Not Enabled: CPU reported that the
“SRC X Open/Close/Trip Breaker By Restricted Control” register received a command but
the Restricted Breaker Control is disabled.
• Breaker Open/Close/Trip Command Restricted Control Enabled: CPU acknowledged
that the normal Open/Close/Trip command was rejected because the associated
command was restricted for the breaker. See