ABB SACE Emax 2 Series Operating Instructions Manual page 270
Low voltage air circuit-breaker
Hide thumbs
Also See for SACE Emax 2 Series:
Table of Contents
Advertisement
Maintenance schedule Proper maintenance of the equipment allows good electromechanical operation to be maintained over
267 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
Continued from the previous page
Interrup-
ted rated
circuit-
current
breaker UL
1066
Iu (40°C) [A]
</= 800
E1.2-A
1200
< 1600
E2.2-A
1600
2000
< 2500
E4.2-A
2500
3200
4000
E6.2-A
5000
6000
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
E1.2 maintenance
E2.2, E4.2 and E6.2 first
level maintenance
E2.2, E4.2 and E6.2 second
level maintenance
Lubrication of jaw-
type isolating contacts
of withdrawable
circuit-breaker
Only for 900V and 1150V circuit-breakers Operating sequences/hour = 10.
(1)
Keep track of the number of racking in and out operations or make an estimate on the basis of the
(2)
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.
Mechanical life with
regular maintenance
No. of
Frequency of
operations
operations/
(x 1000)
hour
20
60
20
60
25
60
25
60
25
60
20
60
20
60
20
60
12
60
12
60
12
60
Frequency in standard envi-
ronments
(1)
One year or 2000 operations or
after tripping due to short circuit
One year or 20% of mechanical life
or 20% of electrical life
Three years or 50% of mechanical
life or 50% of electrical life or after
a trip due to short-circuit
100 racking-in and racking-out
operations
or three years
(2)
ABB | SACE Emax 2
Electrical life
508V AC
635V AC
No. of
No. of
operations
operations
(x 1000)
(x 1000)
8
8
7
6,5
15
15
12
10
10
8
10
10
8
8
7
7
4
4
3
2
2
2
Frequency in dusty envi-
ronments (dust level measured
> 1mg/m
)
3
6 months or 1000 operations or
after tripping due to short circuit
6 months or 10% of mechanical
life or 10% of electrical life
18 months or 25% of mechanical
life or 25% of electrical life or after
a trip due to short-circuit
50 racking-in and racking-out
operations
or 18 months
(2)
Putting into service and maintenance
2 - Maintenance
Frequency of
operations/
hour
30
30
30
30
30
20
20
20
10
10
10
Advertisement
Table of Contents
