Basler BE1-51C, Instruction Manual

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BE1-51C General Information
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BE1-51C SPECIFICATIONS
The BE1-51C relay is available in single-phase, three-phase, two-phase-with-neutral, and three-phase-with-
neutral configurations, and with the following features and capabilities.
Current Sensing Inputs The unit is designed to operate from the secondary of a standard current
transformer rated at 5 A. The maximum continuous current rating for each
input is five times tap or 20 A, whichever is less.
The one-second current rating for each input is 50 times tap or 500 A,
whichever is less. Ratings at less than one second are calculated as:
where
K = (500 A or 50 times TAP)
2
T = Time that current flows (in seconds)
Current Sensing Burden Less than 0.1 ohm.
Frequency (nominal) 60 Hz.
Time Overcurrent
Pickup Ranges Two ranges are available: HIGH (2-11 A), and LOW (0.5-5 A). Range is
independently specified for phase and neutral by the second digit of the
Style Number. The TAP range plate(s) on the front panel indicate which
range (HIGH or LOW) is specified.
Pickup Adjustment Incrementally adjustable over the selected range by a front-panel (TAP)
selector switch (coarse), and by numerical data entered into the Tap Cal
register (fine).
Pickup Setting Accuracy The accuracy of the pickup setting is ±2% of the programmed setting over
the full specified range of the relay at 60 Hz.
Pickup Repeatability Within 2%.
Dropout Ratio Better than 80% of the established pickup level within 50 milliseconds.
Instantaneous Overcurrent
Pickup Range 0.5 to 20 times the value of the time overcurrent pickup setting.
Pickup Setting Accuracy The accuracy of the instantaneous pickup setting is ±2% of the
programmed setting over the full specified range of the relay at 60 Hz.
Pickup Repeatability Within 2%.
Dropout Ratio Better than 80% of the established pickup level within 50 milliseconds.