FANOX SIL-A A Series, User Manual

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4.11 Function 37. Instantaneous phase undercurrent
This protection function can be set by using the following parameters:
Function Description Minimum Maximum Step Unit Default
37 (*) Instantaneous phase undercurrent
Function Enable - - No/Alarm/Trip - No
Current Tap 0.010 30.000 0.001 xIn 0.500
Minimum Level 0.000 1.000 0.001 xIn 0.000
Time delay 0.060 300.00 0.001 s 0.200
(*) Optional depending on model
The setting “Minimum level” indicates the minimum level of current it is necessary to measure to work
with the function. This is, if the measured current is lower than the “Minimum Level” setting, the function
will not trip although this current is lower than the tap.
The time delay is independent from the operating current flowing through the relay, so if the phase
current drops below its predetermined value for an equal or greater amount of time than this preset
value, the protection function activates (trips) and does not reset itself until the average value of the
phase exceeds the point of current pick-up.
The function activates at 100% of the preset input and deactivates at 105%. The reset is instantaneous.
The accuracy of the Time Delay is equal to the set time delay ±30ms or ±0.5% (whichever is greater).
4.12 Function 52. Circuit Breaker monitoring
This control function can be set by using the following parameters:
Function Description Minimum Maximum Step Unit Default
52 (*) Circuit breaker monitoring
Maximum number of openings 1 100000 1 - 1000
Maximum accumulated amperes 1 100000 1 M(A²) 100
Repetitive number of openings 1 100000 1 - 3
Time for repetitive number of openings 1 300 1 min 3
Maximum opening time 0.020 300.000 0.001 s 0.10
Maximum closing time 0.020 300.000 0.001 s 0.10
(*) Optional depending on model