Three-phase Starting Autotransformers EA3R

Starting autotransformers are used primarily in high power drive systems where the switching of the star connection in the triangle connection of stator windings is technically difficult and does not provide tangible results. In the case of start-up transformers the voltage can be arbitrarily lowered at the time of starting the motor, so that the current drawn from the network does not exceed the set value. If necessary, we can produce starting autotransformers with many tappings.

Product for:

Details:

Design	Three-phase starting autotransformers EA3R are produced in accordance with requirement of standard: EN/IEC 60726
Insulation class	F(155^oC) - standard
Climatic class/Environmental class	C1/E0 - land design; C2/E1 - maritime design
Ambient temperature	40^oC
Protection degree	IP 23
Protection class	I
Frequency	50/60 Hz
Primary voltage	up to 1000 V
Secondary voltage	up to 1000 V
Fastening	by means of angles

Technical sketch


Standard design

Dimension table

Technical data of three-phase starting autotransformers type EA3R

Type of autotransformer	Core power factor / Outgoing powerc przechodnia [kVA]	Sample data	L [mm]	B [mm]	H [mm]	d [mm]	e [mm]	f [mm]	Weight [kg]
EA3R	0,55/1,5	3x240V(50Hz)/3x380V Yan0	200	220	220	160	180	9 x 13	11
EA3R	25/77	3x440V(60Hz)/3x290V III	660	650	710	430	600	13 x 18	205
EA3R	60/350	3x440V(60Hz)/3x215V III	720	650	785	490	600	13 x 18	315
EA3R	61/370	3x380V(60Hz)/3x270-230V III	870	705	845	590	655	13 x 18	430
EA3R	90/480	3x380V/3x200V II	870	705	845	590	655	13 x 18	450