User Manual

System overview

3.4 Mounting / removal

3UG4 / 3RR2 monitoring relays

Manual, 02/2013, NEB927043002000/RS-AA/002

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 Operating instruction 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 to 1.2 Nm).

Check that the cable is clamped tight.

Note

The connection cross-section of the removable and permanently connected terminal blocks

with screw-type connection are described in Chapter "Screw-type connection (Page 19)."