ABB | SACE Emax 2
252 | © 2013
ABB |
1SDH001000R0002 - L7804
Putting into service and maintenance | 3 - Maintenance
Circuit-breaker life
Emax 2 circuit-breakers, with or without opening or closing releases, can withstand the
following operating cycles if regularly serviced
(1)
.
Circuit-
breaker
Interrupted
rated
current
Mechanical life with
regular maintenance
Electrical life
440V AC
690V AC
Frequency
of
Operations/
hour
Iu (40°C)
[A]
No.
operations
(x 1000)
Frequency
of
Operations/
hour
No.
operations
(x 1000)
No.
operations
(x 1000)
E2.2
< 1600
25
60
15
15
30
1600
25
60
12
10
30
2000
25
60
10
8
30
2500
20
60
8
7
30
E4.2
< 2500
20
60
10
10
20
2500
20
60
8
8
20
3200
20
60
7
7
20
4000
15
60
5
4
20
3200
15
60
2
2
20
E6.2
4000
12
60
4
4
10
5000
12
60
3
2
10
6300
12
60
2
2
10
(1)
See chapter 5 - Environmental conditions on page 22 .
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.
Type of maintenance
Frequency of maintenance
in standard environments
(1)
Frequency of maintenance
in dusty environments
(dust level measured >
1mg/m3)
First Level
One year or 20% of
mechanical life or 20% of
electrical life
6 months or 10% of
mechanical life or 10% of
electrical life
Second Level
Three years or 50% of
mechanical life or 50% of
electrical life or after a trip
under short-circuit
18 months or 25% of
mechanical life or 25% of
electrical life or after a trip
under short-circuit
(1)
See chapter 5 - Environmental conditions on page 22 .
Compliance with the following rules is also recommended:
• Even circuit-breakers that are operated 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 carried out. With
Ekip Dip releases, 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 releases, the information is
available at any time on the appropriate display. With Ekip Dip releases, 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.
