ABB | SACE Emax 2
58 | © 2019 ABB | 1SDH001000R0002 - ECN000109166 - Rev. D Putting into service and maintenance | 3 - Maintenance
3 - Maintenance
Safety standards
The following are the warnings to be respected during the maintenance operations
HAZARD! RISK OF ELECTRIC SHOCK! Risk of electric shock or accident.
WARNING! before proceeding with any maintenance operation, it is mandatory to:
• Set the circuit-breaker to the open position and make sure that the springs of the
operating mechanism are discharged.
• In the case of a withdrawable circuit-breaker, extract the circuit-breaker from the fixed
part (see the indication DISCONNECTED)
• If work must be performed on fixed circuit-breakers or on fixed parts, disconnect
the power supply to the power circuit and auxiliary circuits and visibly ground the
terminals on both the supply side and load side.
• Use adequate personal protection equipment, ensure that the apparatus is in a safe
condition and proceed in accordance with the Laws in force.
Skilled personnel
The maintenance operations must be carried out by Skilled Personnel:
electrically skilled person (IEV 195-04-01): person with relevant education and experience to enable him or
her to perceive risks and to avoid hazards which electricity can create.
ABB declines all liability for damage to persons or property caused by failure to comply with the instructions
in this document.
Circuit-breaker life
The circuit-breakers SACE Emax 2, with or without opening or closing coils, can withstand the following
operating cycles if regularly serviced. For further information see chapter 4 - Environmental conditions on
page 23.
circuit-
breaker
IEC 60947
Interrup
-
ted rated
current
Mechanical life with
regular maintenance
Electrical life
440V
AC
690V
AC
900V
AC
1150V
AC
Frequency of
operations/
hour
Iu (40°C) [A]
No. of
operations
(x 1000)
Frequency
of
operations/
hour
No. of operations (x 1000)
E2.2
< 1250 25 60 15 15 2 1 30
1600 25 60 12 10 2 1 30
2000 25 60 10 8 2 1 30
2500 20 60 8 7 2 1 30
E4.2
< 2500 20 60 10 10 0,5 1 20
(1)
2500 20 60 8 8 0,5 1 20
(1)
3200 20 60 7 7 0,5 1 20
(1)
4000 15 60 5 4 0,5 1 20
(1)
E6.2
4000 12 60 4 4 1 1 10
5000 12 60 3 2 1 1 10
6300 12 60 2 2 1 1 10
(1)
Only for 900V and 1150V circuit-breakers Operating sequences/hour = 10.
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