Basler BE1-CDS220, Инструкция по эксплуатации

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1-2 General Information BE1-CDS220
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An optional independent ground current input is available for directly measuring the current in a
transformer neutral, tertiary winding, or a flux balancing CT and for providing ground differential
protection.
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Each of the seven current sensing circuits is low burden and isolated to allow improving zones of
protection with fewer costly CTs.
Contact Sensing Inputs
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Eight programmable contact sensing inputs with programmable signal conditioning provide binary
logic interface to the protection and control system: IN1, IN2, IN3, IN4, IN5, IN6, IN7, and IN8.
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The function of each input is programmable using BESTlogic and can be given a user meaningful
name for the variable and for each state (open and closed) for use in reporting functions.
Contact Outputs
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Six programmable general purpose contact outputs provide binary logic interface to the protection
and control system: OUT1, OUT2, OUT3, OUT4, OUT5, and OUT6.
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One programmable, fail-safe, alarm output: OUTA
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All outputs are trip rated and output 1 and 6 are high speed (quarter-cycle nominal speed). Output
6 is Form C.
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Each output is programmable using BESTlogic and can be given a user meaningful name for the
variable and for each state (open and closed) for use in reporting functions.
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Output logic can be overridden to open, close, or pulse each output contact for testing or control
purposes.
Protection and Control Functions
Setting Groups
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Four settings groups allow adaptive relaying to be implemented to optimize the relay settings for
various operating conditions.
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Automatic and external logic can be employed to select the active setting group.
Differential Protection
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Three-phase percentage restrained differential protection with harmonic restraint: 87.
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Restricted earth fault ground differential protection with optional independent ground input: 87ND.
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Tap compensation for the differential protection can be automatically calculated by the relay
based upon user settings of CT ratio, MVA and kV base values.
Overcurrent Protection
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Nine instantaneous overcurrent functions with settable time delay. Three each for Phase, Neutral,
and Negative Sequence. Each function is individually assignable to any of the current input
circuits. Functions are: 50TP, 150TP, 250TP, 50TN, 150TN, 250TN, 50TQ, 150TQ, 250TQ.
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Nine inverse time overcurrent functions with integrating or instantaneous reset. Three each for
Phase, Neutral, and Negative Sequence. Each function is individually assignable to any of the
current input circuits. Functions are: 51TP, 151TP, 251TP, 51TN, 151TN, 251TN, 51TQ, 151TQ,
251TQ.
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Time overcurrent functions employ a dynamic integrating timing algorithm covering a range from
pickup to 40 times pickup with selectable instantaneous or integrated reset characteristics.
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Time overcurrent curves conform to the IEEE PC37.112 document and include seven curves
similar to Westinghouse/ABB CO curves, five curves similar to GE IAC curves, four IEC curves, a
fixed time curve, and a user programmable curve.
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Digital signal processing filters out unwanted harmonic components while providing fast
overcurrent response with limited transient overreach and overtravel.
Breaker Failure Protection
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One breaker failure protection function block is assignable to any of the current input circuits.
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The current circuit assigned to the breaker failure function block also determines which current
circuit is used by the breaker monitoring functions described later.