Siemens SIRIUS 3RT Series System Manual page 510

SIRIUS 3RU2/3RB3 overload relays
5.6 Mounting
Table 5- 15 Mounting the 3RU21 overload relay with a spring-loaded connection system
Step Operating instruction
1 Insert the contacts (a) into the central opening
of the main conductor terminals on the
contactor (see below, a), with the contacts
flush to the right. Make sure that the guide
tabs are inserted into the designated slots on
the contactor.
The overload relay will sit flush with the
contactor on the left- and right-hand sides.
The table below shows the openings of the main conductor terminals on the contactor into
which the overload relay contacts have to be inserted.
Main conductor terminals on the contactor (a)
(S00):
Note
Ring cable lug connection system
The procedure for mounting the overload relays with ring cable lug connection system is
similar to that for mounting with screw-type connection system.
510
Figure
Main conductor terminals on the contactor (a)
(S0):
System Manual, 01/2011, A8E56203870002-03
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