GE Power Management
ALPS Advanced Line Protection System
8-9
8 LOCAL USER INTERFACE
8.1 INTRODUCTION
8
OUTPUTS DISABLED is displayed, and the Status LED turns RED. If a key other than a [1/Y] or [3/N] is pressed, an error
message is displayed and the outputs are not disabled. If this category is selected when outputs are already disabled, the
following message is displayed and must be cleared with the [CLR] key.
8.1.13 ENABLE OUTPUTS
This command is used to enable the digital outputs of the relay.
The relay will ask whether to enable the outputs. Press [3/N] for NO or [1/Y] for YES and then press the [ENT] key. If NO is
selected, CANCELED is displayed and no ALPS action occurs. If YES is selected, two checks are performed: for the CON-
TROL or MASTER privilege level and whether communication is in the process of performing an action. If the test fails, an
error message is displayed and the action is not performed. If the test passes, the action is performed and OUTPUTS
ENABLED is displayed. The Status LED will turn GREEN if there are no status problems with the relay. If a key other than
[1/Y] or [3/N] is pressed, an error message is displayed and the outputs are not enabled.
If this category is selected when outputs are already enabled, the relay will display a message which must be cleared with
the [CLR] key.
8.1.14 TRIP BREAKER
This command manually trips a breaker. Each breaker controlled by the relay must be tripped individually. If the relay is
controlling two breakers when this category is selected, the relay will request which breaker to trip.
To indicate the breaker, press [1] or [2] followed by the [ENT] key (any other Data Entry key will cause an error message to
be displayed). If the relay is set to control one breaker, this query will be skipped.
The relay will then ask whether to trip the selected breaker. Select [3/N] (NO) or [1/Y] (YES) followed by the [ENT] key. If
NO is chosen, CANCELED appears on the display and no action occurs. If YES is chosen, two checks are performed: for
the CONTROL or MASTER privilege level and whether communication is in the process of performing an action. If the
checks fail, then an error message is displayed and the action is not performed. If the checks pass, then the action is per-
formed and either BREAKER x TRIPPED or NOT TRIPPED appears on the bottom line of display (depending on the status
of the breaker). If a Data Entry key other than [3/N] or [1/Y] is pressed, an error message is displayed and the breaker is not
tripped.
The breakers are tripped as follows:
•
For one breaker and one trip circuit, output contact T1 is energized.
•
For one breaker and two trip circuits, output contact T1 and T2 are energized.
•
For two breakers with one trip circuit each, output contacts T1 and T2 are energized.
•
For two breakers with two trip circuits each, output contacts T1, T2. T3 and T4 are energized.
8.1.15 CLOSE BREAKER
This command is used to manually close the breaker. If two breakers are being controlled by the relay, each breaker must
be closed individually. If the relay is controlling two breakers when this category is selected, the relay will request which
breaker to close.
The user presses [1] or [2] (any other Data Entry key will cause an error message to be displayed) followed by the [ENT]
key to indicate the breaker. If the relay is controlling only one breaker, this query is skipped.
DISABLE OUTPUTS
OUTPUTS CURRENTLY
DISABLED.
TRIP BREAKER
Trip Breaker 1/2?
