Autotransformers

Autotransformers are the efficient and ideal solution for minor voltage adjustments. Compact designs can be provided depending on the voltage difference. Autotransformers feature lower losses compared with isolating transformers with the same power rating. The transformers without galvanic isolation also feature inverse operation. BLOCK’s standard range features power outputs of between 150 VA and 250,000 VA.

Overview:

◼︎ Efficient solution for minor voltage adjustments
◼︎ Inverse operation possible
◼︎ Power output: 250 VA to 250,000 VA


Product search for Autotransformers

130 Versions of 9 products
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Image of BLOCK Item: AIM
AIM
Autotransformer
, PRI 115/220/230/240 Vac, SEC 115/220/230/240 Vac, 0.8 – 16 A
Display options
Version Rated input voltage Rated output voltage Rated output current
AIM 1,6/0,8 115 Vac/220 Vac/230 Vac/240 Vac 115 Vac/220 Vac/230 Vac/240 Vac 0.80 (PRI 115/SEC 220, 230, 240); 1.60 (PRI 115/SEC 115); 1.60 (PRI 220, 230, 240/SEC 115, 220, 230, 240)
AIM 3,2/1,6 115 Vac/220 Vac/230 Vac/240 Vac 115 Vac/220 Vac/230 Vac/240 Vac 1.60 (PRI 115/SEC 220, 230, 240); 3.20 (PRI 115/SEC 115); 3.20 (PRI 220, 230, 240/SEC 115, 220, 230, 240)
AIM 5,0/2,5 115 Vac/220 Vac/230 Vac/240 Vac 115 Vac/220 Vac/230 Vac/240 Vac 2.50 (PRI 115/SEC 220, 230, 240); 5.00 (PRI 115/SEC 115); 5.00 (PRI 220, 230, 240/SEC 115, 220, 230, 240)
AIM 10/5 115 Vac/220 Vac/230 Vac/240 Vac 115 Vac/220 Vac/230 Vac/240 Vac 5.00 (PRI 115/SEC 220, 230, 240); 10.00 (PRI 115/SEC 115); 10.00 (PRI 220, 230, 240/SEC 115, 220, 230, 240)
AIM 16/8 115 Vac/220 Vac/230 Vac/240 Vac 115 Vac/220 Vac/230 Vac/240 Vac 8.00 (PRI 115/SEC 220, 230, 240); 16.00 (PRI 115/SEC 115); 16.00 (PRI 220, 230, 240/SEC 115, 220, 230, 240)
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Image of BLOCK Item: VT-EN
VT-EN
Autotransformer
Robust metal fixing rail, PRI 110/125/230/240 Vac, SEC 110/125/230/240 Vac, 150 – 3,000 VA
Display options
Version Rated input voltage Rated output voltage Power
VT 15-EN 110 Vac/125 Vac/230 Vac/240 Vac 110 Vac/125 Vac/230 Vac/240 Vac 150 VA
VT 35-EN 110 Vac/125 Vac/230 Vac/240 Vac 110 Vac/125 Vac/230 Vac/240 Vac 350 VA
VT 50-EN 110 Vac/125 Vac/230 Vac/240 Vac 110 Vac/125 Vac/230 Vac/240 Vac 500 VA
VT 100-EN 110 Vac/125 Vac/230 Vac/240 Vac 110 Vac/125 Vac/230 Vac/240 Vac 1,000 VA
VT 200-EN 110 Vac/125 Vac/230 Vac/240 Vac 110 Vac/125 Vac/230 Vac/240 Vac 2,000 VA
VT 300-EN 110 Vac/125 Vac/230 Vac/240 Vac 110 Vac/125 Vac/230 Vac/240 Vac 3,000 VA
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Image of BLOCK Item: ESP
ESP
Autotransformer
Base plate, PRI 230 Vac, 400 Vac, SEC 80 – 310 Vac, 0.8 – 18 A
Display options
Version Rated input voltage Rated output voltage Rated output current
ESP 230/1,5 230 Vac 80 Vac/115 Vac/130 Vac/150 Vac/170 Vac/190 Vac 1.50 A
ESP 230/2,8 230 Vac 80 Vac/115 Vac/130 Vac/150 Vac/170 Vac/190 Vac 2.80 A
ESP 230/5,8 230 Vac 80 Vac/115 Vac/130 Vac/150 Vac/170 Vac/190 Vac 5.80 A
ESP 230/10 230 Vac 80 Vac/115 Vac/130 Vac/150 Vac/170 Vac/190 Vac 10.00 A
ESP 230/18 230 Vac 80 Vac/115 Vac/130 Vac/150 Vac/170 Vac/190 Vac 18.00 A
ESP 400/0,8 400 Vac 140 Vac/170 Vac/200 Vac/235 Vac/270 Vac/310 Vac 0.80 A
ESP 400/1,6 400 Vac 140 Vac/170 Vac/200 Vac/235 Vac/270 Vac/310 Vac 1.60 A
ESP 400/3,6 400 Vac 140 Vac/170 Vac/200 Vac/235 Vac/270 Vac/310 Vac 3.60 A
ESP 400/5,4 400 Vac 140 Vac/170 Vac/200 Vac/235 Vac/270 Vac/310 Vac 5.40 A
ESP 400/10 400 Vac 140 Vac/170 Vac/200 Vac/235 Vac/270 Vac/310 Vac 10.00 A
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Image of BLOCK Item: E-JET
E-JET
Autotransformer
, PRI 230 Vac, SEC 110 Vac, 250 – 1,000 VA
Display options
Version Rated input voltage Rated output voltage Power
E-JET 250 230 Vac 110 Vac 250 VA
E-JET 500 230 Vac 110 Vac 500 VA
E-JET 1000 230 Vac 110 Vac 1,000 VA
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Image of BLOCK Item: JET
JET
Autotransformer
, PRI 110 Vac, SEC 230 Vac, 250 – 1,000 VA
Display options
Version Rated input voltage Rated output voltage Power
JET 250 110 Vac 230 Vac 250 VA
JET 500 110 Vac 230 Vac 500 VA
JET 1000 110 Vac 230 Vac 1,000 VA
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Image of BLOCK Item: AT3
AT3
Autotransformer
Fixing rail, PRI 3 x 200/208 Vac – 3 x 690 Vac, SEC 3 x 400 Vac, 2,000 – 250,000 VA
Display options
Version Rated input voltage Rated output voltage Power
AT3 2-20/21-4 3 x 200/208 Vac 3 x 400 Vac 2.000 VA
AT3 2-22/23-4 3 x 220/230 Vac 3 x 400 Vac 2.000 VA
AT3 2-24/35-4 3 x 240/346 Vac 3 x 400 Vac 2.000 VA
AT3 2-38/42-4 3 x 380/415 Vac 3 x 400 Vac 2.000 VA
AT3 2-44/46-4 3 x 440/460 Vac 3 x 400 Vac 2.000 VA
AT3 2-48/50-4 3 x 480/500 Vac 3 x 400 Vac 2.000 VA
AT3 2-58/60-4 3 x 575/600 Vac 3 x 400 Vac 2.000 VA
AT3 2-69-4 3 x 600/690 Vac 3 x 400 Vac 2.000 VA
AT3 2-69-23 3 x 690 Vac 3 x 400 Vac 2.000 VA
AT3 3,5-20/21-4 3 x 200/208 Vac 3 x 400 Vac 3.500 VA
AT3 3,5-22/23-4 3 x 220/230 Vac 3 x 400 Vac 3.500 VA
AT3 3,5-24/35-4 3 x 240/346 Vac 3 x 400 Vac 3.500 VA
AT3 3,5-38/42-4 3 x 380/415 Vac 3 x 400 Vac 3.500 VA
AT3 3,5-44/46-4 3 x 440/460 Vac 3 x 400 Vac 3.500 VA
AT3 3,5-48/50-4 3 x 480/500 Vac 3 x 400 Vac 3.500 VA
AT3 3,5-58/60-4 3 x 575/600 Vac 3 x 400 Vac 3.500 VA
AT3 3,5-69-4 3 x 600/690 Vac 3 x 400 Vac 3.500 VA
AT3 10-20/21-4 3 x 200/208 Vac 3 x 400 Vac 10.000 VA
AT3 10-22/23-4 3 x 220/230 Vac 3 x 400 Vac 10.000 VA
AT3 10-24/35-4 3 x 240/346 Vac 3 x 400 Vac 10.000 VA
AT3 10-38/42-4 3 x 380/415 Vac 3 x 400 Vac 10.000 VA
AT3 10-44/46-4 3 x 440/460 Vac 3 x 400 Vac 10.000 VA
AT3 10-48/50-4 3 x 480/500 Vac 3 x 400 Vac 10.000 VA
AT3 10-58/60-4 3 x 575/600 Vac 3 x 400 Vac 10.000 VA
AT3 10-69-4 3 x 600/690 Vac 3 x 400 Vac 10.000 VA
AT3 15-20/21-4 3 x 200/208 Vac 3 x 400 Vac 15.000 VA
AT3 15-22/23-4 3 x 220/230 Vac 3 x 400 Vac 15.000 VA
AT3 15-24/35-4 3 x 240/346 Vac 3 x 400 Vac 15.000 VA
AT3 15-38/42-4 3 x 380/415 Vac 3 x 400 Vac 15.000 VA
AT3 15-44/46-4 3 x 440/460 Vac 3 x 400 Vac 15.000 VA
AT3 15-48/50-4 3 x 480/500 Vac 3 x 400 Vac 15.000 VA
AT3 15-58/60-4 3 x 575/600 Vac 3 x 400 Vac 15.000 VA
AT3 15-69-4 3 x 600/690 Vac 3 x 400 Vac 15.000 VA
AT3 25-20/21-4 3 x 200/208 Vac 3 x 400 Vac 25.000 VA
AT3 25-22/23-4 3 x 220/230 Vac 3 x 400 Vac 25.000 VA
AT3 25-24/35-4 3 x 240/346 Vac 3 x 400 Vac 25.000 VA
AT3 25-38/42-4 3 x 380/415 Vac 3 x 400 Vac 25.000 VA
AT3 25-44/46-4 3 x 440/460 Vac 3 x 400 Vac 25.000 VA
AT3 25-48/50-4 3 x 480/500 Vac 3 x 400 Vac 25.000 VA
AT3 25-58/60-4 3 x 575/600 Vac 3 x 400 Vac 25.000 VA
AT3 25-69-4 3 x 600/690 Vac 3 x 400 Vac 25.000 VA
AT3 45-20/21-4 3 x 200/208 Vac 3 x 400 Vac 45.000 VA
AT3 45-22/23-4 3 x 220/230 Vac 3 x 400 Vac 45.000 VA
AT3 45-24/35-4 3 x 240/346 Vac 3 x 400 Vac 45.000 VA
AT3 45-38/42-4 3 x 380/415 Vac 3 x 400 Vac 45.000 VA
AT3 45-44/46-4 3 x 440/460 Vac 3 x 400 Vac 45.000 VA
AT3 45-48/50-4 3 x 480/500 Vac 3 x 400 Vac 45.000 VA
AT3 45-58/60-4 3 x 575/600 Vac 3 x 400 Vac 45.000 VA
AT3 45-69-4 3 x 600/690 Vac 3 x 400 Vac 45.000 VA
AT3 70-20/21-4 3 x 200/208 Vac 3 x 400 Vac 70.000 VA
AT3 70-22/23-4 3 x 220/230 Vac 3 x 400 Vac 70.000 VA
AT3 70-24/35-4 3 x 240/346 Vac 3 x 400 Vac 70.000 VA
AT3 70-38/42-4 3 x 380/415 Vac 3 x 400 Vac 70.000 VA
AT3 70-44/46-4 3 x 440/460 Vac 3 x 400 Vac 70.000 VA
AT3 70-48/50-4 3 x 480/500 Vac 3 x 400 Vac 70.000 VA
AT3 70-58/60-4 3 x 575/600 Vac 3 x 400 Vac 70.000 VA
AT3 70-69-4 3 x 690 Vac 3 x 400 Vac 70.000 VA
AT3 110-20/21-4 3 x 200/208 Vac 3 x 400 Vac 110.000 VA
AT3 110-22/23-4 3 x 220/230 Vac 3 x 400 Vac 110.000 VA
AT3 110-24/35-4 3 x 240/346 Vac 3 x 400 Vac 110.000 VA
AT3 110-38/42-4 3 x 380/415 Vac 3 x 400 Vac 110.000 VA
AT3 110-44/46-4 3 x 440/460 Vac 3 x 400 Vac 110.000 VA
AT3 110-48/50-4 3 x 480/500 Vac 3 x 400 Vac 110.000 VA
AT3 110-58/60-4 3 x 575/600 Vac 3 x 400 Vac 110.000 VA
AT3 110-69-4 3 x 690 Vac 3 x 400 Vac 110.000 VA
AT3 160-20/21-4 3 x 200/208 Vac 3 x 400 Vac 160.000 VA
AT3 160-22/23-4 3 x 220/230 Vac 3 x 400 Vac 160.000 VA
AT3 160-24/35-4 3 x 240/346 Vac 3 x 400 Vac 160.000 VA
AT3 160-38/42-4 3 x 380/415 Vac 3 x 400 Vac 160.000 VA
AT3 160-44/46-4 3 x 440/460 Vac 3 x 400 Vac 160.000 VA
AT3 160-48/50-4 3 x 480/500 Vac 3 x 400 Vac 160.000 VA
AT3 160-58/60-4 3 x 575/600 Vac 3 x 400 Vac 160.000 VA
AT3 160-69-4 3 x 690 Vac 3 x 400 Vac 160.000 VA
AT3 250-20/21-4 3 x 200/208 Vac 3 x 400 Vac 250.000 VA
AT3 250-22/23-4 3 x 220/230 Vac 3 x 400 Vac 250.000 VA
AT3 250-24/35-4 3 x 240/346 Vac 3 x 400 Vac 250.000 VA
AT3 250-38/42-4 3 x 380/415 Vac 3 x 400 Vac 250.000 VA
AT3 250-44/46-4 3 x 440/460 Vac 3 x 400 Vac 250.000 VA
AT3 250-48/50-4 3 x 480/500 Vac 3 x 400 Vac 250.000 VA
AT3 250-58/60-4 3 x 575/600 Vac 3 x 400 Vac 250.000 VA
AT3 250-69-4 3 x 690 Vac 3 x 400 Vac 250.000 VA
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Image of BLOCK Item: DSP
DSP
Autotransformer
Fixing rail, PRI 3 x 400 Vac, SEC 3 x 130/170/190/230/240 Vac, 3 x 1.5 – 3 x 15 A
Display options
Version Rated input voltage Rated output voltage Rated output current
DSP 400/1,5 3 x 400 Vac 3 x 240 Vac/3 x 230 Vac/3 x 190 Vac/3 x 170 Vac/3 x 130 Vac 3 x 1.5 A
DSP 400/3 3 x 400 Vac 3 x 240 Vac/3 x 230 Vac/3 x 190 Vac/3 x 170 Vac/3 x 130 Vac 3 x 3 A
DSP 400/6 3 x 400 Vac 3 x 240 Vac/3 x 230 Vac/3 x 190 Vac/3 x 170 Vac/3 x 130 Vac 3 x 6 A
DSP 400/9 3 x 400 Vac 3 x 240 Vac/3 x 230 Vac/3 x 190 Vac/3 x 170 Vac/3 x 130 Vac 3 x 9 A
DSP 400/15 3 x 400 Vac 3 x 240 Vac/3 x 230 Vac/3 x 190 Vac/3 x 170 Vac/3 x 130 Vac 3 x 15 A
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Image of BLOCK Item: ESS
ESS
Variable transformer
DIN rail, PRI 230 Vac, SEC 0 – 250 Vac, 0.8 – 20 A
Display options
Version Rated input voltage Rated output voltage Rated output current
ESS 102 230 Vac 0...230/250 Vac 2.00 A
ESS 103 230 Vac 0...230/250 Vac 3.15 A
ESS 104 230 Vac 0...230/250 Vac 4.00 A
ESS 106 230 Vac 0...230/250 Vac 6.30 A
ESS 108 230 Vac 0...230/250 Vac 8.00 A
ESS 110 230 Vac 0...230/250 Vac 10.00 A
ESS 118 230 Vac 0...230/250 Vac 18.00 A
ESS 120 230 Vac 0...230/250 Vac 20.00 A
ESS 302 230 Vac 0...230/260 Vac 1.80 A
ESS 303 230 Vac 0...230/260 Vac 3.15 A
ESS 305 230 Vac 0...230/260 Vac 5.00 A
ESS 308 230 Vac 0...230/260 Vac 8.00 A
ESS 318 230 Vac 0...230/260 Vac 18.00 A
ESS 9008 230 Vac 0...230 Vac 0.80 A
ESS 9013 230 Vac 0...230 Vac 1.25 A
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Image of BLOCK Item: PVAT3
PVAT3
Autotransformer
, PRI 3 x 690 Vac, SEC 3 x 400 Vac, 650 – 1,386 VA
Display options
Version Rated input voltage Rated output voltage Power
PVAT3 20 3 x 690 Vac 3 x 400 Vac 650 VA
PVAT3 40 3 x 690 Vac 3 x 400 Vac 1,386 VA
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