System overview
3.4 Mounting / removal
3UG4 / 3RR2 monitoring relays
30
Manual, 05/2016, NEB927043002000/RS-AC/004
Direct mounting on 3RT2 contactor / 3RF34 (size S0) solid-state contactor
The diagram below shows an example mounting scenario based on mounting the
3RR21 analog setting current monitoring relay, size S0, on the 3RT2 contactor.
Table 3- 7
Mounting of 3RR2 current monitoring relay, screw-type connection system (size S0)
Step
Instructions
Figure
1
Push the current monitoring relay into
the contactor from below. Attach the
two hooks on the current monitoring
relay to the two openings on the rear
of the contactor. This pushes the
main current contacts into the
corresponding terminals on the
contactor.
2
Tighten the screws on the contactor
with a Pozidriv size 2 (S00) or
Pozidriv size 3 (S0) screwdriver
(tightening torque 0.8 ... 1.2 Nm).
Check that the cable is clamped tight.
Note
The connection cross-sections of the removable and permanently connected terminal blocks
with screw-type connections are described in the Chapter "Screw-type connection
(Page 21)".