FAU810 Flame analysis pre/monitoring spot ABB, Sweden

Description

• FAU810 Protection and monitoring elements are configured in this page. This includes complete

  differential protection; phase, neutral, ground, negative sequence overcurrent; restricted

  ground fault (differential ground); under, over, and rate-of-change of frequency;

  overexcitation; harmonic monitoring; analog FAU810 input monitoring; current demand

  monitoring; and transformer overload monitoring.

•  

  Each element is comprised of a number of setpoints, some of which are common to all

  elements. These common setpoints are described below, avoiding repeated descriptions

  throughout this section:

  Following the setpoint descriptions are logic diagrams illustrating how each setpoint, input

  parameter, and internal logic is used in a feature to obtain an output. The logic diagrams

  are organized into the following FAU810 functional blocks:

  <NAME OF ELEMENT>

  FUNCTION: Enabled

  Range: Disabled, Enabled

  Select “Enabled” to enable the element. For critical protection

  elements, this setpoint is normally “Enabled” except for test

  purposes. For elements FAU810 which are not to be used, this

  setpoint should be set to “Disabled”.

  <NAME OF ELEMENT>

  RLYS (1-8):

  Range: 1 TO 8

  Select output relay to be configured for the element.

  <NAME OF ELEMENT>

  TARGET: Latched

  Range: Self-reset, Latched, None

  Target messages indicate which elements have picked up or

  operated. Select “Latched” to keep the element target

  message in the queue of target FAU810 messages, even after the

  condition which caused the element to operate has been

  cleared, until a reset command is issued. Select “Self-reset” to

  automatically remove the target message from the message

  queue after the condition has been cleared. Select “None” to

  inhibit the display of the target message when the element

  operates. An element whose target type is “None” will never

  disable the LED self-test feature because can not generate a

  displayable target message.

  <NAME OF ELEMENT>

  BLOCK: Disabled

  Range: Disabled, Logc Inpt 1 to 16, Virt Inpt 1 to 16, Output

  Rly 1 to 8, SelfTest Rly, Virt Outpt 1 to 5

  Select any logic input, virtual input, output relay, or virtual

  output which, when asserted or operated, blocks the element

  from operating. Selecting a logic or virtual input allows

  blocking the element based on a decision external to the 745.

  Selecting an output relay or virtual output allows blocking the

  element based on conditions detected by the 745 and the

  combination of logic programmed in the associated

  FlexLogic™ equation.

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Contact: Chen