GE G60 UR Series, Instruction Manual

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5-256 G60 Generator Protection System GE Multilin
5.10 TESTING 5 SETTINGS
5
The
TEST MODE FUNCTION
setting can only be changed by a direct user command. Following a restart, power up, settings
upload, or firmware upgrade, the test mode will remain at the last programmed value. This allows a G60 that has been
placed in isolated mode to remain isolated during testing and maintenance activities. On restart, the
TEST MODE FORCING
setting and the force contact input and force contact output settings all revert to their default states.
5.10.2 FORCE CONTACT INPUTS
PATH: SETTINGS
ÖØ
TESTING
ÖØ
FORCE CONTACT INPUTS
The relay digital inputs (contact inputs) could be pre-programmed to respond to the test mode in the following ways:
• If set to “Disabled”, the input remains fully operational. It is controlled by the voltage across its input terminals and can
be turned on and off by external circuitry. This value should be selected if a given input must be operational during the
test. This includes, for example, an input initiating the test, or being a part of a user pre-programmed test sequence.
• If set to “Open”, the input is forced to report as opened (Logic 0) for the entire duration of the test mode regardless of
the voltage across the input terminals.
• If set to “Closed”, the input is forced to report as closed (Logic 1) for the entire duration of the test mode regardless of
the voltage across the input terminals.
The force contact inputs feature provides a method of performing checks on the function of all contact inputs. Once
enabled, the relay is placed into test mode, allowing this feature to override the normal function of contact inputs. The Test
Mode LED will be on, indicating that the relay is in test mode. The state of each contact input may be programmed as “Dis-
abled”, “Open”, or “Closed”. All contact input operations return to normal when all settings for this feature are disabled.
Table 5–27: TEST MODE OPERATION
TEST MODE
FUNCTION TEST MODE
FORCING
OPERAND IN-SERVICE
LED TEST MODE
LED CRITICAL
FAIL
RELAY INPUT AND OUTPUT BEHAVIOR
Disabled No effect Unaffected Off Unaffected Contact outputs and inputs are under normal
operation. Channel tests and PMU tests not
operational (where applicable).
Isolated No effect Off On De-
energized Contact outputs are disabled and contact inputs
are operational. Channel tests and PMU tests
are also operational (where applicable).
Forcible On (logic 1) Off Flashing De-
energized Contact inputs and outputs are controlled by the
force contact input and force contact output
functions. Channel tests and PMU tests are
operational (where applicable).
Off (logic 0) Off Flashing De-
energized Contact outputs and inputs are under normal
operation. Channel tests and PMU tests are also
operational (where applicable).
„
FORCE CONTACT
„
INPUTS
FORCE Cont Ip 1
:Disabled
Range: Disabled, Open, Closed
MESSAGE
FORCE Cont Ip 2
:Disabled
Range: Disabled, Open, Closed
↓
MESSAGE
FORCE Cont Ip xx
:Disabled
Range: Disabled, Open, Closed