User Guide
Table Of Contents
- 3 3RT1 contactors/ 3RH1 control relays
- 3.1 Specifications/regulations/approvals
- 3.2 Device description
- 3.3 Application and areas of use
- 3.3.1 3RT10 contactors with 3 main contacts for switching motors
- 3.3.2 3RT14 contactors with 3 main contacts for switching resistive loads (AC-1)
- 3.3.3 3RT12 Vacuum contactors
- 3.3.4 3RT13 and 3RT15 contactors with 4 main contacts
- 3.3.5 3RT16 capacitor contactors
- 3.3.6 Contactors with an extended operating range
- 3.3.7 3RH1 control relays
- 3.3.8 3RT10 contactor relays for switching motors (interface) and 3RH11 control relays for switching auxiliary circuits
- 3.3.9 3RA13 Contactor combinations for reversing
- 3.3.10 3RT14 Wye-delta combinations
3RT1 contactors/ 3RH1 control relays
SIRIUS System Manual
GWA 4NEB 430 0999-02 DS 01
3-15
The following graphic shows the withdrawable coils for the air-break and vacuum contactors in frame
sizes S6 to S12:
Fig. 3-2: Withdrawable coils for the air-break and vacuum contactors frame sizes S6 to S12
3.2.2.1 The conventional coil
The control voltage is directly connected to the magnetic coil over the A1/A2
terminals to close and open the switch. After the coil is energized and the
contacts close, a built-in changeover contact (SPDT) switches the magnetic
coil from pick-up - to holding coil (DC-economy connection).
Control voltage Several control voltages that are close to each other can be covered with a
single coil, for example UC 220 - 230 - 240 V.
Coil voltage tolerance The operational range is 0.8 x U
s min
- 1.1 x U
s max
,
That means for example: 0.8 x 220 V - 1.1 x 240 V.
Surge suppressor (RC element)
Withdrawable coil with "conven-
tional operating mechanism"
Withdrawable coil with "elec-
tronic operating mechanism"
Withdrawable coil with for con-
tactors with remaining lifetime
indication RLT and
associated Electronic module
Vacuum contactor
3RT12
Air-break contactor
3RT10 and 3RT14