Siemens SENTRON 3WL10, Руководство пользователя

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Application planning
4.2 Power supply, grounding, and connection
Air circuit breaker 3WL10
118
Manual, 11/2017, L1V30499596002-01
Means of connection, cables A
[mm]
∅
[mm]
A ∅
[mm
2
]
Connections of the fixed breaker version
Circular conductor terminal,
adapter 4x240
30 21.5 120 to 240
The following applies to connecting bars to horizontally / vertically orientable rear terminals
for main circuit connection:
Rated uninterrupted current I
u
[A]
Busbar dimensions Horizontally oriented
rear terminals
Vertically oriented
rear terminals
630 2 x 40 x 5 ● ●
800 2 x 50 x 5 ● ●
1000 2 x 50 x 10 ● —
2 x 50 x 8 — ●
1250 2 x 50 x 10 ● —
2 x 50 x 8 — ●
Grounding
The fixed circuit breaker does not require grounding.
For the withdrawable breaker, two alternatives are possible to achieve continuity and
equipotentiality of the grounding between the circuit breaker and the protection circuit of the
switchboard:
● Connection of the guide frame to the protection circuit with a cable in accordance with
IEC 61439-1, Section 10.5.2
● If a conductive connection between the guide frame and the grounding of the switchboard
is ensured via the metal base (floor mounting) or the metal wall (wall mounting) of the
switchboard panel, no additional grounding is required. This means there must be no
insulation material between the circuit breaker and the grounded metal of the switchboard
panel.