NHP TemBreak PRO P - Page 18

Installation
18
TemBreak PRO P_BE-UM-001-EN V1.3.0
Insulating Distance
When earth metal is installed within proximity of the breakers, the correct insulating distance must be maintained, (refer to Minimum Clearance).
This distance is necessary to allow the exhausted arc gases to disperse. This could include the mounting plate or side panel within a switchboard.
Minimum Clearance
Below illustrates the minimum clearance that must be maintained.
Dim.
Description
MCCB Cat. No.
Distances (mm)
A
B
1
B
2
C
D
E
A
Distance from lower breaker to open charging part of terminal on
upper breaker (front connection) or the distance from lower
breaker to upper breaker end (rear connection and plug-in type)
P160F
50
10
10
0
25
^
P160N / H / D
75
45
25
0
25
^
P250F
50
40
30
0
25
^
B
1
Distance from breaker end to ceiling (earthed metal)
P250N / H / D
80
80
30
0
25
^
B
2
Distance from breaker end to insulator
P400F / N / H / D
100
80
60
0
80
^
C
Clearance between breakers
P400S
120
120
80
0
80
^
D
Distance from breaker side to side plate (earthed metal)
P630F / N / H / D
100
80
60
0
80
^
E
Length of insulation over exposed conductors.
P630S
120
120
80
0
80
^
^ Insulate the exposed conductor until it overlaps the moulded case at the terminal, or the terminal cover.