System overview
SIRIUS System Manual
GWA 4NEB 430 0999-02b
1-17
1.5.2 Screw-type terminals
The terminals used do not vary within a frame size. The current switched by
the different devices of a single frame size does not vary either. This means
you can use the same tool, torque, and conductor cross-section for the cir-
cuit breakers, contactors, and overload relays of a single frame size. The
stripped lengths are also the same. This is important in the case of prefabri-
cated wiring.
Screw-type terminals
All the devices have screw-type terminals, either a terminal with a top
washer or a box terminal, depending on the frame size.
Devices with frame sizes S00 and S0 have terminals with captive screws
and terminal washers that enable you to connect 2 conductors, even if they
have different cross-sections.
The box terminals of frame size S2 and S3 can also take 2 conductors with
different cross-sections.
Connection tools
Use the following tools to make the connection:
• Frame sizes S00 to S2: Screws are available for rated currents of up to
50 A for Pozidriv2 screwdrivers.
• Frame size S3: To obtain the required torques for the frame size for up to
100 A, the screws have a 4 mm hexagon socket.
The screwdriver guides allow screwdriving machines to be used.
Lugs and connecting
bars
You can remove the box terminals from the devices with a frame size of S3
to connect conductors with lugs or connecting bars. A terminal cover is
available as shock protection and to ensure that you comply with the
required creepages and clearances when the box terminals are removed.
You can find a detailed description in section n.4 on accessories.
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