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.
Product search for Autotransformers
Phases
Output power
- 1000 VA (3)
- 10000 VA (8)
- 110000 VA (8)
- 1386 VA (1)
- 150 VA (1)
- 15000 VA (8)
- 160000 VA (8)
- 2000 VA (10)
- 25000 VA (8)
- 250000 VA (8)
- 3000 VA (1)
- 350 VA (1)
- 3500 VA (8)
- 45000 VA (8)
- 500 VA (1)
- 650 VA (1)
- 70000 VA (8)
Input voltage
- 110 Vac (7)
- 115 Vac (5)
- 125 Vac (6)
- 220 Vac (5)
- 230 Vac (37)
- 240 Vac (11)
- 3 x 200/208 Vac (10)
- 3 x 220/230 Vac (10)
- 3 x 240/346 Vac (10)
- 3 x 380/415 Vac (10)
- 3 x 440/460 Vac (10)
- 3 x 480/500 Vac (10)
- 3 x 575/600 Vac (10)
- 3 x 600/690 Vac (7)
- 3 x 690 Vac (6)
Output voltage
- 110 Vac (12)
- 115 Vac (5)
- 125 Vac (6)
- 220 Vac (5)
- 230 Vac (12)
- 240 Vac (11)
- 3 x 400 Vac (83)
- 80 Vac (10)
- infinitely variable (15)
Design
Degree of protection
Connections
Fixing method
121 Versions of 8 products
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| 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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AT3
Autotransformer
Fixing rail, PRI 3 x 200/208 Vac – 3 x 690 Vac, SEC 3 x 400 Vac, 2,000 – 250,000 VA
| 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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VT-EN
Autotransformer
Robust metal fixing rail, PRI 110/125/230/240 Vac, SEC 110/125/230/240 Vac, 150 – 3,000 VA
| 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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| Version | Rated input voltage | Rated output voltage | Power | |
|---|---|---|---|---|
| E-JET 1000 | 230 Vac | 110 Vac | 1,000 VA |
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| Version | Rated input voltage | Rated output voltage | Power | |
|---|---|---|---|---|
| JET 1000 | 110 Vac | 230 Vac | 1,000 VA |
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| 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 A (PRI 115/ SEC 220-240); 1,60 A (PRI 220-240/ SEC 115-240) | |
| AIM 3,2/1,6 | 115 Vac/ 220 Vac/ 230 Vac/ 240 Vac | 115 Vac/ 220 Vac/ 230 Vac/ 240 Vac | 1,60 A (PRI 115/ SEC 220-240); 3,20 A (PRI 220-240/SEC 115-240) | |
| AIM 5,0/2,5 | 115 Vac/ 220 Vac/ 230 Vac/ 240 Vac | 115 Vac/ 220 Vac/ 230 Vac/ 240 Vac | 2,50 A (PRI 115/ SEC 220-240); 5,00 A (PRI 220-240/SEC 115-240) | |
| AIM 10/5 | 115 Vac/ 220 Vac/ 230 Vac/ 240 Vac | 115 Vac/ 220 Vac/ 230 Vac/ 240 Vac | 5,00 A (PRI 115/ SEC 220-240); 10,00 A (PRI 220-240/SEC 115-240) | |
| AIM 16/8 | 115 Vac/ 220 Vac/ 230 Vac/ 240 Vac | 115 Vac/ 220 Vac/ 230 Vac/ 240 Vac | 8,00 A (PRI 115/ SEC 220-240); 16,00 A (PRI 220-240/SEC 115-240) |
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| 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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| 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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