L2234
L2778
Emax
20/158
Doc. No.
Model
Apparatus
Scale
Page No.
1SDH000460R0002
7
5
6
2
1
4
3
5
7
9
8
E1-E3 E4-E6
6
9
8
2
1
3
4
8.2 Maintenance program
Fig. 32
8.3 Maintenance operations
8.3.1 Preliminary operations
– Remove the flange (1) of the release, turning the screws (2) as shown in the figures
– Remove the front escutcheon plate (3) by removing the four screws (4)
– Remove, if present, one or both side guards (5) by removing the front (6) and lateral (7) screws
– Remove the arcing chambers (8) by removing the screws (9).
Maintenance operations Interval
Installation in normal rooms Installations in dusty or polluted rooms
General inspection (see par. 8.3.2) One year or after a short-circuit trip Six months or after a short-circuit trip
External visual check and inspection One year Six months
of the power section
Operating mechanism maintenance (par. 8.3.4) One year or 10000 operations Six months or 10000 operations
Checking trip of the release One year Six months
(*) With regular ordinary maintenance
With regular maintenance, SACE Emax circuit-breakers, either with or without a geared motor, can withstand the following operation without
replacement of parts.
Rated uninterrupted current Mechanical life (*) Electrical life
Iu (40 °C) No. of operations Frequency 440 V ~ 690 V ~ Frequency
[A] x 1000 operations/hour No. of operations x 1000 No. of operations x 1000 operations/hour
E1 B-N 800 25 60 10 10 30
1000-1250 25 60 10 8 30
1600 25 60 10 8 30
E2 B-N-S 800 25 60 15 15 30
1000-1250 25 60 15 15 30
1600 25 60 12 10 30
2000 25 60 10 8 30
E2 L 1250 20 60 4 3 20
1600 20 60 3 2 20
E3 N-S-H-V 800 20 60 12 12 20
1000-1250 20 60 12 12 20
1600 20 60 10 10 20
2000 20 60 9 9 20
2500 20 60 8 7 20
3200 20 60 6 5 20
E3 L 2000 15 60 2 1.5 20
2500 15 60 1.8 1.3 20
E4 S-H-V 3200 15 60 7 7 10
4000 15 60 5 4 10
E6 H-V 3200 12 60 5 5 10
4000 12 60 4 4 10
5000 12 60 3 2 10
6300 12 60 2 1.5 10
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