23
2
Installation example
Safety clearance
Minimum safety clearances for BX100 to 630
Operating voltage
Clearance (mm)
Between
devices
Between device and sheetmetal
Painted sheet metal
Bare sheet metal
A1
C1
D1
D2
C1
D1
D2
U
d
440 V
for devices equipped with:
no accessories
0
0
30
30
5
40
40
short terminal shields
0
0
30
30
5
40
40
interphase barriers
0
0
0
0
5
0
0
long terminal shields
0
0
0
0
0
0
0
440 V < U
d
600 V
for devices equipped with:
short terminal shields
0
0
30
30
10
40
40
interphase barriers
(1)
0
0
0
0
20
10
10
long terminal shields
(2)
0
0
0
0
10
10
10
U > 600 V
for devices equipped with:
short terminal shields
0
10
50
50
20
100
100
long terminal shields
0
10
30
30
20
40
40
(1) Only for BX100 to 250.
(2) For all cases.
Clearances with respect to live bare busbars
Minimum clearances for BX100 to 630
Operating voltage
Clearances with respect to live bare busbars
spacing y 60 mm
spacing > 60 mm
F1
F2
F1
F2
U < 440 V
350
350
80
80
440 V
d
U
d
600 V
350
350
120
120
U > 600 V
prohibited: insulating screen required between device and busbars
These clearances can be reduced for special installations as long as the configuration is checked by
tests.
Minimum distance between two
adjacent circuit breakers
Minimum distance between circuit
breaker and front or rear panels
A1
Front
panel
F
F
B = 0
Bare or painted sheetmetal
Note
:
if F < 8 mm: an insulating screen or long
terminal shield is mandatory.
Minimum distance between circuit breaker and top, bottom or side panels
D1
D2
C1
D1
D1
D1
Devices without accessories.
Devices with interphase barriers or long or short terminal shields.
F1
Spacing
60 mm
F2
F1
Spacing > 60 mm
Bars
Bars
F2
Live busbars.
Operating characteristics and performance
2-2 Breaking performance
