3RA1445-8XB20-1AF0
CONTACTOR COMBINATION,

From SIEMENS

Contactor assembly Star-delta (wye-delta) (pre-assembled) with timing relay on the front AC-3, 75 kW/400 V, 3-pole Size S3, S3, S3 Electrically interlocked Screw terminal 1 NO, 110 V AC, 50 Hz !!! Phased-out product !!! Successor is SIRIUS 3RA2
Product brand nameSIRIUS
Product designationcontactor assembly
Size of contactorS3, S3, S2
Product functionwye-delta-contactor
Product extension Auxiliary switchYes
Insulation voltage with degree of pollution 3 rated value690 V
Degree of pollution3
Protection class IP on the frontIP20
Reference code acc. to DIN 40719 extended according to IEC 204-2 acc. to IEC 750K
Reference code acc. to DIN EN 81346-2Q
Reference code acc. to DIN EN 61346-2Q
Installation altitude at height above sea level maximum2 000 m
Number of poles for main current circuit3
Number of NC contacts for main contacts0
Operating voltage at AC-3 rated value maximum690 V
Operating current
at AC-3 at 400 V rated value150 A
Operating power at AC-3
at 400 V rated value75 kW
at 500 V rated value103 kW
at 690 V rated value110 kW
Type of voltage of the control supply voltageAC
Control supply voltage 1 at AC
at 50 Hz rated value110 V
Control supply voltage frequency
1 rated value50 Hz
Operating range factor control supply voltage rated value of magnet coil at DC
initial value0.8
Full-scale value1.1
Operating range factor control supply voltage rated value of magnet coil at AC
at 50 Hz0.8 ... 1.1
at 60 Hz0.85 ... 1.1
Design of the surge suppressorwithout
Control version of the switch operating mechanismconventional
Number of NC contacts for auxiliary contacts lagging switching0
Number of NO contacts for auxiliary contacts
leading contact0
Design of the fuse link for short-circuit protection of the main circuit
with type of coordination 1 requiredfuse gL/gG: 250 A
with type of assignment 2 requiredfuse gL/gG: 160 A
Mounting positionwith vertical mounting surface +/-180° rotatable, with vertical mounting surface +/- 30° tiltable to the front and back
Mounting typescrew fixing
Height180 mm
Width218 mm
Depth194 mm
Required spacing
with side-by-side mounting at the side0 mm
for grounded parts at the side0 mm
for live parts
— at the side0 mm
Type of electrical connection for main current circuitscrew-type terminals

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