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B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
TESTING
CHAPTER 5: SETTINGS
5
Otherwise, the UR remains fully operational while in the Forcible test mode, allowing for various testing procedures. In
particular, the protection and control elements, and FlexLogic function normally. Other than the IEC 61850 protocol,
communications based inputs and outputs remain fully operational. The test procedure must take this into account. Direct
I/O channel tests and PMU tests are usable on applicable models.
The test mode can be selected either through the front panel, through EnerVista UR Setup, or through IEC 61850 control to
LLN0.Mod. LLN0.Mod.ctlVal "on" selects Disabled, "test/blocked" selects Isolated, and "test" selects Forcible. 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 remains at the last programmed value. This allows a UR that has been placed in isolated
mode to remain isolated during testing and maintenance activities.
5.11.2 Test mode forcing
SETTINGS
TESTING
TEST MODE FORCING
When in Forcible mode, the operand selected by the
TEST MODE FORCING
setting dictates further response of the B30 to
testing conditions, as described in the following two sections.
The test mode state is indicated on the relay front panel by a combination of the Test Mode LED indicator, the In-Service
LED indicator, and by the critical fail relay, as shown in the following table.
Table 5-35: Test mode operation
5.11.3 Force contact inputs
SETTINGS
TESTING
FORCE CONTACT INPUTS
The force contact inputs feature provides a method of performing checks on the function of all contact inputs.
While in Forcible test mode, the relay contact inputs can be pre-programmed to respond in the following ways:
•
If set to “Normal,” 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. Select this value 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.
TESTING
TEST MODE FORCING:
On
Range: FlexLogic operand
TEST MODE
FUNCTION
In-service
LED
Test mode
LED
Critical fail
relay
TEST MODE
FORCING
Contact input and output behavior
Disabled
Unaffected
Off
Normal
No effect
Normal
Isolated
Off
On
De-energized No effect
Contact outputs disabled
Forcible
Off
Flashing
De-energized Off
Normal
On
Controlled by forcing features
On restart, the
TEST MODE FORCING
setting and the force contact input and force contact output settings revert to
their default states.
FORCE CONTACT
INPUTS
FORCE Cont Ip 1
: Normal
Range: Normal, Open, Closed
FORCE Cont Ip 2
: Normal
Range: Normal, Open, Closed
FORCE Cont Ip xx
: Normal
Range: Normal, Open, Closed
Summary of Contents for b30
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Page 486: ...5 278 B30 BUS DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
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