Siemens SIRIUS 3RH Series, System Manual

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SIRIUS 3RR2 current monitoring relays
8.6 Mounting
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
699
8.6 Mounting
8.6.1 Mounting options
3RR2 current monitoring relays are matched to 3RT2 contactors and 3RF34 (S0) solid-state
contactors in terms of their electrical and mechanical features. As a result, direct mounting
can be achieved easily.
Alternatively, the devices can also be installed individually in the case of stand-alone
assembly or if a 3RU2/3RB3 overload relay is being used at the same time.
8.6.2 Minimum clearances and mounting positions
Minimum clearance
A minimum lateral clearance of > 6 mm must be maintained from grounded parts.
Mounting position
It can be mounted in any position.
8.6.3 Mounting/Disassembly
Direct mounting on 3RT2 contactor/3RF34 (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 8- 3 Mounting of 3RR2 current monitoring relay, screw-type connection system (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.