ABB | SACE Emax 2
Putting into service and maintenance
2 - Maintenance
267 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
Continued from the previous page
circuit-
breaker UL
1066
Interrup
-
ted rated
current
Mechanical life with
regular maintenance
Electrical life
508V AC 635V AC
Frequency of
operations/
hourIu (40°C) [A]
No. of
operations
(x 1000)
Frequency of
operations/
hour
No. of
operations
(x 1000)
No. of
operations
(x 1000)
E1.2-A
</= 800 20 60 8 8 30
1200 20 60 7 6,5 30
E2.2-A
< 1600 25 60 15 15 30
1600 25 60 12 10 30
2000 25 60 10 8 30
E4.2-A
< 2500 20 60 10 10 20
2500 20 60 8 8 20
3200 20 60 7 7 20
E6.2-A
4000 12 60 4 4 10
5000 12 60 3 2 10
6000 12 60 2 2 10
Maintenance schedule
Proper maintenance of the equipment allows good electromechanical operation to be maintained over
time.
The maintenance plan for SACE Emax 2 circuit-breakers specifies two periodic levels of maintenance for
the different types of site conditions.
The following is a table of maintenance frequency with the periodic intervals and the routine maintenance
operations.
Activity
Frequency in standard envi-
ronments
(1)
Frequency in dusty envi-
ronments (dust level measured
> 1mg/m
3
)
E1.2 maintenance
One year or 2000 operations or
after tripping due to short circuit
6 months or 1000 operations or
after tripping due to short circuit
E2.2, E4.2 and E6.2 first
level maintenance
One year or 20% of mechanical life
or 20% of electrical life
6 months or 10% of mechanical
life or 10% of electrical life
E2.2, E4.2 and E6.2 second
level maintenance
Three years or 50% of mechanical
life or 50% of electrical life or after
a trip due to short-circuit
18 months or 25% of mechanical
life or 25% of electrical life or after
a trip due to short-circuit
Lubrication of jaw-
type isolating contacts
of withdrawable
circuit-breaker
100 racking-in and racking-out
operations
(2)
or three years
50 racking-in and racking-out
operations
(2)
or 18 months
(1)
Only for 900V and 1150V circuit-breakers Operating sequences/hour = 10.
(2)
Keep track of the number of racking in and out operations or make an estimate on the basis of the
average number of racking out operations to ensure that the jaw-type isolating contacts are cleaned
and lubricated correctly.
Compliance with the following rules is also recommended:
• even circuit-breakers that operate infrequently or that remain closed or open for long periods of
time must be subjected to programmed maintenance
• All the circuit-breakers provide information on the number of operations performed in the presence
of auxiliary power supply of the Trip Unit. With Ekip Dip trip units, the information can be obtained
with the aid of Ekip T&P and a PC on which the Ekip Connect software is installed. With Ekip Touch
trip units, the information is available at any time on the appropriate display. With Ekip Dip trip
units, installation of the mechanical operation counter is recommended (supplied on request).
• During the service, visually inspect the circuit-breaker from the outside to check for the presence
of dust, dirt or damage.
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