Figure 4-24: 3Ru11: Cage Clamp Terminal (Frame Size S2) - Siemens sirius System Manual

3RU11, 3RB10, and 3RB12 overload relays
Screw-type terminal
Cage Clamp terminal
Connection cross-sec-
tions
4-30
The screws are captive, and the screwdriver guides allow the use of power
screwdrivers.
The following illustration shows a Cage Clamp terminal with the 3RU11,
using the example of frame size S2:

Figure 4-24: 3RU11: Cage Clamp terminal (frame size S2)

Conductors with a cross-section of 0.5 mm
2
2.5 mm can be used.
1. Insert the screwdriver into the opening until the stop.
Note
The 8WA280 screwdriver is recommended for opening the Cage Clamp ter-
minal.
The screwdriver head automatically keeps the clamp open.
Caution
When clamping and unclamping, the screwdriver must be inserted in the
rectangular opening until the stop. You must not make any levering or tur-
ning movements, because these might break the cage clamp.
2. Insert the conductor in the oval terminal opening.
3. Remove the screwdriver.
The terminal clamp closes, and the conductor is thus securely clamped.
You can obtain the permissible connection cross-sections for the main and
auxiliary connections of the overload relays from Section 4.7, "Technical
specifications".
2
(with insulation stop) to
SIRIUS System Manual
GWA 4NEB 430 0999-02b