SIRIUS 3RT2 – Solid-State Time-Delay Auxiliary Switch – Siemens Auxiliary Switches

USD $ 121.38

SKU: 3RA2815-1FW10

The auxiliary switches can be designed as positively driven contacts in 3RH contactor relays or also as mirror contacts in the case of 3RT power contactors.

Siemens Auxiliary Switch 3RA28 Product Specifications:

product brand name SIRIUS
Article Number 3RA2815-1FW10
product designation Solid-state time-delay auxiliary switch
product type designation 3RA28
General technical data
size of contactor can be combined company-specific S00, S0, S2, S3
product component semi-conductor output No
product extension required remote control No
product extension optional remote control No
insulation voltage for overvoltage category III according to 300 V
IEC 60664 with degree of pollution 3 rated value
test voltage for isolation test 1.5 kV
degree of pollution 3
surge voltage resistance rated value 4 kV
test voltage for surge voltage test 4 800 V
protection class IP of the terminal IP20
shock resistance according to IEC 60068-2-27 15g / 11 ms
vibration resistance according to IEC 60068-2-6 10 … 59 Hz: 0.35 mm, 60 … 150 Hz: 2g
mechanical service life (switching cycles) typical 10 000 000
mechanical service life (switching cycles)
● with contactor 3R.2 of frame size S00 10 000 000
● with contactor 3R.2 of frame size S0 10 000 000
● with contactor 3R.2 of frame size S2 10 000 000
● with contactor 3R.2 of frame size S3 10 000 000
electrical endurance (switching cycles) at AC-15 at 230 V typical 100 000
electrical endurance (switching cycles)
● with contactor 3R.2 of frame size S00 100 000
● with contactor 3R.2 of frame size S0 100 000
● with contactor 3R.2 of frame size S2 100 000
● with contactor 3R.2 of frame size S3 100 000
adjustable time 0.05 … 100 s
relative setting accuracy relating to full-scale value 15%
minimum ON period 200 ms
recovery time 150 ms
reference code according to IEC 81346-2 K
relative repeat accuracy 1%
influence of the surrounding temperature ±1 %
power supply influence ±1 %
Substance Prohibitance (Date) 10/1/2009
Product Function
product function star-delta circuit No
Control circuit/ Control
type of voltage of the control supply voltage AC/DC
control supply voltage 1 at AC
● at 50 Hz 24 … 240 V
● at 60 Hz 24 … 240 V
control supply voltage frequency 1 50 … 60 Hz
control supply voltage 1
● at DC 24 … 240 V
operating range factor control supply voltage rated
value at DC
● initial value 0.85
● full-scale value 1.1
operating range factor control supply voltage rated
value at AC at 50 Hz
● initial value 0.85
● full-scale value 1.1
operating range factor control supply voltage rated
value at AC at 60 Hz
● initial value 0.85
● full-scale value 1.1
design of the surge suppressor with with varistor
Switching Function
switching function
● ON-delay No
● ON-delay/instantaneous contact No
● passing make contact No
● passing make contact/instantaneous contact No
● OFF delay Yes
switching function
● flashing symmetrically with interval start/instantaneous No
● flashing symmetrically with interval start No
● flashing symmetrically with pulse start/instantaneous No
● flashing symmetrically with pulse start No
● flashing asymmetrically with interval start No
● flashing asymmetrically with pulse start switching function No
switching function
● constant clock cycle with pulse start No
● constant clock cycle with interval start switching function No
switching function
● variably clocked with pulse start No
● variably clocked with interval start switching function No
switching function
● star-delta circuit with delay time No
● star-delta circuit No
switching function with control signal
● additive ON-delay No
● passing break contact No
● passing break contact/instantaneous No
● OFF delay No
● OFF delay/instantaneous No
● pulse delayed No
● pulse delayed/instantaneous No
● pulse-shaping No
● pulse-shaping/instantaneous No
● additive ON-delay/instantaneous No
● ON-delay/OFF-delay No
● ON-delay/OFF-delay/instantaneous No
● passing make contact No
● passing make contact/instantaneous contact No
switching function of interval relay with control signal
● retrotriggerable with deactivated control signal/instantaneous contact No
● retrotriggerable with switched-on control signal No
● retrotriggerable with switched-on control No
signal/instantaneous contact
● retriggerable with deactivated control signal No
design of the control terminal non-floating No
Short-circuit protection
design of the fuse link for short-circuit protection of the auxiliary switch required fuse gL/gG: 4 A
Auxiliary circuit
material of switching contacts AgNi
number of NC contacts
● delayed switching 1
number of NO contacts
● delayed switching 1
operational current of auxiliary contacts at AC-15
● maximum 3 A
● at 24 V 3 A
● at 250 V 3 A
operational current of auxiliary contacts as NC contact at AC-15
● at 24 V 3 A
● at 250 V 3 A
operational current of auxiliary contacts as NO contact at AC-15
● at 24 V 3 A
● at 250 V 3 A
operational current of auxiliary contacts at DC-13 1 … 0.1
operational current of auxiliary contacts at DC-13
● at 24 V 1 A
● at 125 V 0.2 A
● at 250 V 0.1 A
operating frequency with 3RT2 contactor maximum 2 500 1/h
contact rating of auxiliary contacts according to UL B300 / R300
Main circuit
type of voltage AC/DC
Inputs/ Outputs
product function
● at the relay outputs switchover delayed/without No
● non-volatile No
Electromagnetic compatibility
EMC immunity according to IEC 61812-1 Environment A (industrial area)
conducted interference
● due to burst according to IEC 61000-4-4 2 kV network connection / 1 kV control connection
● due to conductor-earth surge according to IEC 61000-4-5 2 kV
● due to conductor-conductor surge according to IEC 61000-4-5 1 kV
field-based interference according to IEC 61000-4-3 10 V/m
electrostatic discharge according to IEC 61000-4-2 8 kV
Safety related data
protection class IP on the front according to IEC 60529 IP20
type of insulation Basic insulation
category according to EN 954-1 none
Connections/ Terminals
product component removable terminal for auxiliary Yes
and control circuit
type of electrical connection for auxiliary and control circuit screw-type terminals
type of connectable conductor cross-sections
● solid 0.5 … 4 mm², 2x (0.5 … 2.5 mm²)
● finely stranded with core end processing 1x (0.5 … 2.5 mm²), 2x (0.5 … 1.5 mm²)
● at AWG cables solid 2x (20 … 14)
● at AWG cables stranded 2x (20 … 14)
connectable conductor cross-section
● solid 0.5 … 4 mm²
● finely stranded with core end processing 0.5 … 2.5 mm²
● finely stranded without core end processing 0.25 … 1.5 mm²
AWG number as coded connectable conductor cross
section
● solid 20 … 14
● stranded 20 … 14
Installation/ mounting/ dimensions
mounting position any (like contactor)
fastening method clip-on
height 38 mm
width 45 mm
depth 74 mm
required spacing
● with side-by-side mounting
— forwards 0 mm
— backwards 0 mm
— upwards 0 mm
— downwards 0 mm
— at the side 0 mm
● for grounded parts
— forwards 0 mm
— backwards 0 mm
— upwards 0 mm
— at the side 0 mm
— downwards 0 mm
● for live parts
— forwards 0 mm
— backwards 0 mm
— upwards 0 mm
— downwards 0 mm
— at the side 0 mm
Ambient conditions
installation altitude at height above sea level maximum 2 000 m
ambient temperature
● during operation -25 … +60 °C
● during storage -40 … +85 °C
● during transport -40 … +85 °C
relative humidity during operation 0 … 95 %
Weight 0.075 kg
Dimensions 4.7 × 10.7 × 5.5 cm

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