Internal Accessories - Tracon Electric AKM1 User Manual

Internal Accessories

Internal accessories of AKM1, AKM2, AKM3, and AKM4 series: undervoltage release, shunt release
and auxiliary alarm release, their main technical parameters and wiring diagram are as follows:
Undervoltage release
Rated voltage of power supply
L
U
AC230
AC400
L
SHTc
SHTa
U
L
U
Shunt release
ALa ALb ALc
Rated voltage of power supply
SHTc
SHTa
DC24,
SHTc
SHTa AC230, AC400
Axc Axb Axa
ALa ALb ALc
ALa ALb ALc
Auxiliary alarm contact
ALa ALb ALc
Rated voltage of power supply
Auxiliary switch
Axc Axb Axa
Axc Axb Axa
ALa ALb ALc
Alarm switch
ALa ALb ALc
Auxiliary alarm switch
Main features
A., Undervoltage release should act
when voltage drops to within 70%
and 35% of the rated voltage.
B., The undervoltage release should not
be able to close to prevent the circuit
breaker from closing when voltage is
lower than 35% of the rated voltage.
C., The undervoltage release should en-
sure to be closed and ensure reliable
closing of the circuit breaker when
voltage is equal to or greater than
85% of the rated voltage.
Main features
Shunt release can work reliably when the
rated voltage value is at 70% and 110%.
Main features
Provides distinctive signals for the circuit
breaker at „ON" and „OFF" positions.
Provides distinctive signals for the circuit
breaker at „normal work" and „trip"
positions.
Provides distinctive signals for the circuit
breaker at „close", „open" and „trip"
positions.
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