3RT1/3RH1 contactors
SIRIUS System Manual
GWA 4NEB 430 0999-02b
3-89
Screw-type terminals
The devices with screw-type terminals have the following features:
• All the connections have captive screws.
• All the terminal points are delivered in the open position.
• The screwdriver guides allow screwdriving machines to be used.
• In frame size S00, all the terminal screws for the main and auxiliary cir-
cuits have a uniform screw size (cross-tip Pozidriv 2 screws) and therefore
all require the same torque.
• In all the frame sizes (S00 to S3), the terminal screws are identical for the
auxiliary conductor terminals (no bit change and uniform torque).
Cage Clamp terminals
In the variant with Cage Clamp terminals, the devices have the following
features:
• The contactors are recommended if strong shaking or vibrations can be
expected at the installation location.
• The terminals are also suitable for two-conductor connections
• All the terminals are accessible from the front and are easily visible.
• A maximum of two conductors with a cross-section of 0.25 mm
2
up to a
maximum 2.5 mm
2
can be used for each terminal point.
Cage Clamp terminals:
Procedure
The following illustration shows you how to use the Cage Clamp terminals:
Figure 3-70: Cage Clamp terminals
Insulation stop
With a conductor cross-section of
≤
1mm
2
, an insulation stop
(3RT1916-4JA02) must be used to hold the conductor insulation securely. An
insulation stop line consists of 5 pairs of connection terminals. The following
illustration demonstrates insertion into the Cage Clamp infeeds.
Figure 3-71: Insulation stop with Cage Clamp terminals
Insert the screwdriver straight
into the opening up until the
stop
(1)
to open the clamping
unit. Insert the conductor in
the oval terminal opening
(2)
,
and remove the screwdriver
(3)
.
1.5 to 2.5 mm²
2
1
3
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