Three-phase autotransformers of ATAM series for asynchronous ttree-phase closed in a case start-up motors with cutrrent at nominal tension, equvalent to six times the nominal one.
Calculated for 5 starts per hour, two of which consecutive and with a 15 seconds duration each.

Technical specifications:
– nominal tension reduced to 70%-75%-80%
– insulation class E
– frequency 50/60 Hz.
– open execution, protection level IP00
– ambient temperature 44°C
– either vertical or horizontal execution
– connection with star centre open
– resin impregnated and tropicalised
– thermostat fitted into the central coil on request
– terminals on terminal boxes up to 75 cv
– bolt terminals on insulating plate for 100cv power
Essential information for order and offers inquiries:
– power in VA or in KVA
– motor nominal tension
– network frequency
– percentage of reduced tension
– numbers of starts for hour
– ambient temperature
– working ambient conditions
Nominal Tension: 400Vac
Code Power
Va		 Watt loss
Watt		 Dv
%		 Vcc
%		 Dim.
A		 Dim.
B		 Dim.
C		 Dim.
D		 Dim.
E		 Weight
Kg
ATAM005 5000 4,2 180 180 120 150 70 9
ATAM010 10000 8,5 180 180 140 150 90 13
ATAM015 15000 12 230 240 150 200 70 15
ATAM020 20000 16 230 240 160 200 80 21
ATAM025 25000 20 230 240 170 200 90 26
ATAM030 30000 24 280 300 180 250 90 33
ATAM040 40000 32 280 300 190 250 100 37
ATAM050 50000 40 280 300 200 250 110 42
ATAM060 60000 48 280 300 210 250 120 48
ATAM075 75000 60 350 360 210 325 100 57
ATAM10 100K 80 350 360 220 325 110 65
ATAM12 125K 100 420 420 240 375 140 95
ATAM15 150K 120 420 42 0250 375 150 105
ATAM18 180K 145 420 420 260 375 160 110
ATAM20 200K 160 460 480 280 455 150 130
ATAM25 250K 200 460 480 300 455 170 150
ATAM30 300K 240 460 480 320 455 190 190
Dv: tension drop from vacuum to full load – Vcc: short-circuit tension.
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