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SIRIUS 3RA28 function modules for mounting on 3RT2 contactors

7.2 Product description

SIRIUS Innovations

System Manual, 01/2011, A8E56203870002-03

645

7.2.2 Performance features

Features

The function modules have the following features:

Function module Features

Solid-state timing relays

with semiconductor

output

 ON-delay (1 NO contact)

 OFF-delay with auxiliary voltage (1 NO contact)

 Versions with screw-type and spring-loaded connection systems

Function modules

for direct-on-line

start

Solid-state time-delay

auxiliary switches

 ON-delay (1 NO contact + 1 NC contact or 1 CO contact)

 OFF-delay with/without auxiliary voltage (1 NO contact + 1 NC contact

or 1 CO contact)

 Versions with screw-type and spring-loaded connection systems

Function modules

for star-delta (wye-

delta) start

Star-delta (wye-delta)

start

 Control exclusively via contactor A1/A2 – no further control circuit

wiring required

 No control circuit wiring (plug-in system and connecting cables)

 Interchange proof construction

 Timing function for switching over from star to delta in basic module

 Electrical interlock without additional wiring

 Changeover delay time set to a non-adjustable value of 50 ms

Siemens SIRIUS 3RF Series User Manual

Questions and Answers: