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System overview

1.7 Components and combinations

SIRIUS Innovations

System Manual, 01/2011, A8E56203870002-03

1.7.3 Monitoring

1.7.3.1 SIRIUS 3RR2 current monitoring relays

3RR2 current monitoring relays

Figure 1-25 S0 current monitoring relays

The SIRIUS 3RR2 current monitoring relays are ideally suited to a range of applications,

thanks to the flexible way in which they can be adjusted:

Table 1- 14 3RR2 current monitoring relays

Area Customer benefits

Functions

 Analog or digital setting

 Overcurrent and undercurrent monitoring

 Phase sequence, phase failure, and fault current monitoring

 Apparent or active current monitoring

 Freely parameterizable threshold values and delay times

 Manual and automatic reset

Dimensioning and

design

 S00, S0 (1.6 up to 40 A with only two versions)

 24 V AC/DC, 24 to 240 V AC/DC

 160 to 690 V wide voltage range in the main circuit

 45 mm width (40 A)

 1 CO contact and 1 semiconductor output

 Clear status signals on the display

 Screw-type and spring-loaded terminals

Mounting

advantages

 Removable terminals for auxiliary circuit wiring

 Direct mounting on contactor

 Same stand-alone mounting support as with overload relays

Application

areas/customer

benefits

 One device for overload and underload monitoring

 Integrated assembly:

– Reduced wiring

– No separate transformers required

– 3-phase current monitoring with further monitoring options

 Current monitoring relay for feeder-integrated load monitoring

 Detection of fast and substantial, as well as slight and "subtle" changes

Brand	Siemens
Model	SIRIUS 3RF Series
Category	Industrial Equipment
Language	English

Siemens SIRIUS 3RF Series User Manual

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Siemens SIRIUS 3RF Series Specifications

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