Page 261 - Sace Emax 2 Manual for design engineers

Continued from the previous page ABB | SACE Emax 2
Faults Possible causes Suggestions
It is not possible to remove
the circuit-breaker from the Fail Safe lock active Discharge the closing springs of the
command
disconnected position
Wrong threshold/time/curve selected Correct parameters
Trip times different than Thermal memory enabled Disable it if it is not necessary
expected Zone selectivity enabled Disable it if it is not necessary
Incorrect neutral selection Modify the neutral selection
Correct operating condition with
Rapid trip with I3 = Off linst trip
short circuit at high current
Incorrect selection of the sensor Set internal or external sensor
High ground-fault current, but Correct operating condition (see use
no trip occurs Function G inhibited owing to high cases in the chapter that describes
current
the protection)
No auxiliary supply or currents lower
Display off and/or not backlit than minimum turn-on values Correct operating condition.
Temperature outside range Correct operating condition.
Current below the minimum Correct operating condition.
threshold that can be displayed
Incorrect frequency setting Set frequency
Harmonic distortion and/or crest
Measurements incorrect or factor off range Correct operating condition.
absent (current, voltage, etc) Incorrect connection between Check connections between
isolation transformer and isolation transformer and
Measurement module Measurement module
Rated voltage parameter setting
Error Set the correct parameters
The expected trip does not Correct operating condition. Enable
occur Trip excluded trip if necessary
No auxiliary power supply and/or
Opening data not displayed Correct operating condition.
battery low
The PIN has been disabled or has
The PIN is not required already been entered in the same Operating condition correct; consult
programming session chapter relating to the PIN
Impossible to change any of Trip unit in alarm condition Correct operating condition.
the parameters
Trip unit set remotely Set it in local mode
The language cannot be The circuit-breaker is not open Open the circuit-breaker
changed One of the possible power supplies Power the trip unit with Vaux, Ekip
is not present T&P or Ekip TT
Contact ABB or consult document
PIN error PIN wrong or lost
1SDH001501R0001
Communication problems Circuit-breaker in withdrawn Insert modules, set circuit-breaker to
with Ekip Com, Ekip Link or position, Vaux absent or modules Connected position, connect Vaux
Ekip Signalling not inserted properly
State of CB Position field not Check for presence of Ekip Com
aligned with circuit-breaker Absence of Ekip Com or Ekip Link or Ekip Link modules and connect
modules, or contact S75I
position contact S75/I

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259 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Alarms or failures | 1 - Identification of alarms or failures