Siemens AC-21A - User Manual

Siemens AC-21A

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SIRIUS Innovations Supplement 2012

3

3/2

Introduction

3RT Power Contactors
for Switching Motors

3/3

General data

3/5

3RT20 contactors, 3-pole, 3 ... 25 HP

3RA23, RA24 Contactor Assemblies

3RA23 Reversing Contactor
Assemblies

3/28

3RA23 complete units, 3 ... 25 HP

3/34

Components for customer assembly

3RA24 Contactor Assemblies for Wye-
Delta Starting

3/36

3RA24 complete units, 5.5 ... 22 kW

3/43

Components for customer assembly

3RT, 3RH Contactors
for Special Applications

3RT23 Contactors for Switching
Resistive Loads (AC-1)

3/45

4-pole, 4 NO, 18 ... 42 A

3RT25 Contactors

3/49

4-pole, 2 NO + 2 NC, 5... 15 HP

Contactors with Extended
Operating Range 0.7 ... 1.25 ×

U

s

,

for Railway Applications

3/53

3RH21 contactor relays

3/55

3RT20 motor contactors,
7.5 ... 25 HP

3RH Contactor Relays

3/58

3RH2 contactor relays, 4- and 8-pole

3RH Control, Coupling Relays

3/67

3RH24 latched control relays,
4-pole

3/68

3RH21 coupling relays for switching
auxiliary circuits, 4-pole

3RT Coupling Contactors

3/71

3RT20 coupling contactors (interface)
for switching motors, 3-pole,
3 ... 20 HP

Function Modules for Mounting
onto SIRIUS 3RT2 Contactors

3/76

Introduction

3/77

SIRIUS function modules

3/78

- For direct-on-line starting via parallel
wiring

3/79

- For reversing starting /
wye-delta starting

3/81

Function modules for IO-Link

3/85

Function modules for AS-Interface

Accessories and Spare Parts

For 3RT2, 3RH2 Contactors and Contactor
Relays

3/89

General data

3/93

Auxiliary switch blocks

3/98

Auxiliary switch blocks, delayed

3/99

Delay and latching blocks

3/100

Surge suppressors

3/101

Other function blocks

3/102

Terminals, covers, adapters, connectors

3/105

Accessories

3/110

Spare parts for 3RT2 contactors

Technical Information

can be found at

www.siemens.com/industrial-controls/
support

under Product List:

- Technical specifications

under Entry List:

- Updates
- Download
- FAQ
- Manuals
- Characteristics
- Certificates

and at

www.siemens.com/industrial-controls/
configurators

- Configurators

SIRIUS Controls –
Contactors and
Contactor Assemblies

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