GE 869 Instruction Manual page 122

SOFTWARE INTERFACE
NOTE:
NOTE:
NOTE:
Breaker/Switch Position
Open
Closed
Open
Closed
Open or Closed
Open or Closed
Open or Closed
NOTE:
3–44
Upgrading from firmware 1.3x and later to 1.8x, the breaker/contactor starting/stopping
operations from the front panel now follow select-before-operate mechanism. The
breaker/contactor must be first selected by browsing and pressing Enter key for selection.
Once selected, the motor can be started or stopped with the front panel's Start and Stop
pushbuttons.
Control Operations
The control operations carried out through the front panel of the relay are done only in
Local Mode ( Setpoints > Control > Local Control Mode > Local Mode
operations can be carried out by pressing the Start and Stop pushbuttons on the relay
front panel. Other operations such as tagging, blocking and bypassing can be carried out
by pressing the control pushbuttons that appear after the control object selection.
It is recommended to use tagging for maintenance purposes only. When a breaker or a
switch is tagged, it cannot be bypassed although the letters "By" may appear below the
element on SLD.
If breaker is selected and relay status is changed to Out-of-Service, the breaker control
actions, such as tag, blocked, bypass and open/close are blocked. The breaker may remain
in the selected state, but no action can be executed.
Once the selected breaker or switch is tagged, a letter "T" appears below the associated
element. Similarly, for blocking, letter "B" appears and for bypassing, letters "By" appear
below the associated breaker or switch as shown in the last column of the following figure.
The blocking and bypassing letters also appear if the breakers/switches are blocked or
bypassed remotely. These are linked to their respective breaker/switch in the SLD
Configurator window so that when that breaker/switch is deleted, the letters also get
deleted.
Permitted breaker/switch operations are described in the following figure below when
various letter indications are present under the control element.
Figure 3-25: Letter Indications for breaker/switch operations
Letter Indication Operation
B Closing is blocked.
B Opening is blocked.
B By Closing is blocked but bypassing is allowed.
Closing is permitted.
B By Opening is blocked but bypassing is allowed.
Opening is permitted.
T Tagged by operator. No operation allowed.
T By Tagged by operator. No operation allowed.
T B By Tagged by operator. No operation allowed.
For bypassing select-before-operate to start and stop motor, the Start Motor PB and Stop
Motor PB settings can be utilized under breaker/contactor control.
For detailed tagging, blocking and bypassing operations, refer to the section
Mode (breakers and switches).
Sample Indication
BKR1
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 3: INTERFACES
). Starting and Stopping
T B By
Local Control