2) One year after short-circuit trip Six months after short-circuit trip
External visual check and inspection
ofthe power section
One year Six months
Operating mechanism maintenance (par.
Rated uninterrupted current echanical life (*) Electrical life
Iu (40 °C) No.
Model 2234 Apparatus Scale
L 2778
Doc-Na 1SDH000460R0002
Page No.With regular maintenance, SACE Emax circuit-breakers, either with without geared motor, can withstand the following operation without
replacement parts.3.
20/158
.8 1.3.3.1 Prelim inary operations
- Remove the flange (1) the release, turning the screws (2) shown the figures
- Remove the front escutcheon plate (3) removing the four screws (4)
- Remove, present, one both side guards (5) removing the front (6) and lateral (7) screws
- Remove the arcing chambers (8) removing the screws (9). operations 1000 No.3 inte tio s
8. 8. operations 1000 operations/hour
E1 B-N 800 30
1000-1250 30
1600 30
E2 B-N-S 800 30
1000-1250 30
1600 30
2000 30
E2 1250 20
1600 20
E3 N-S-H-V 800 20
1000-1250 20
1600 20
2000 20
2500 20
3200 20
E3 2000 1.5 20
2500 1.5 10
(*) With regular ordinary maintenance
8.4) One year 10000 operations Six months 10000 operations
Checking trip ofthe release One year Six months
8.2 ainte m
M aintenance operations Interval
Installation normal rooms Installations dusty polluted rooms
General inspection (see par.3 20
E4 S-H-V 3200 10
4000 10
E6 H-V 3200 10
4000 10
5000 10
6300 1. operations Frequency 440 690 Frequency
[A] 1000 operations/hour No. 8
