Circuit-Breaker Life; Maintenance Schedule - ABB SACE Emax 2 Installation, Operation And Maintenance Instructions For The Installer And The User
Low voltage air circuit-breakers
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Circuit-breaker life SACE Emax 2 circuit-breakers, with or without opening or closing coils, can withstand the following operating
Maintenance schedule Proper maintenance of the equipment allows good electromechanical operation to be maintained over time.
100 | © 2017 ABB | 1SDH000999R0002 - ECN000058721 - Rev. B
cycles if regularly serviced
.
(1)
Interrupted
rated
circuit-breaker
current
IEC 60947
Iu (40°C) [A]
</= 1000
1250
E1.2
1600
1250 L
Interrupted
rated
current
circuit-breaker
UL 1066
Iu (40°C) [A]
</= 800
E1.2-A
1200
(1)
See chapter 5 - Environmental conditions on page 21 .
The maintenance plan for SACE Emax 2 circuit-breakers specifies the maintenance frequency for the different
types of site conditions.
We include the table indicating the frequency with which maintenance should be carried out and the relative
routine maintenance operations required.
Maintenance in standard
environments
One year or 2000 operations or after
Frequency
tripping due to short circuit
(1)
See chapter 5 - Environmental conditions on page 21 .
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.
Electrical life
Mechanical life with
regular maintenance
440V AC
No. of
Frequency of
No. of
operations
operations/
operations
(x 1000)
hour
(x 1000)
20
60
8
20
60
8
20
60
8
20
60
3
Electrical life
Mechanical life with
regular maintenance
508V AC
No. of
Frequency of
No. of
operations
operations/
operations
(x 1000)
hour
(x 1000)
20
60
8
20
60
7
Maintenance in dusty environments
(dust level measured > 1mg/m3)
(1)
6 months or 1000 operations or after
tripping due to short circuit
Putting into service and maintenance | 3 - Maintenance
ABB | SACE Emax 2
690V AC
Frequency of
No. of
operations/hour
operations
(x 1000)
8
30
6.5
30
6.5
30
1
30
635V AC
Frequency of
No. of
operations/hour
operations
(x 1000)
8
30
6.5
30
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