Variable autotransformers

Joint Features of variable autotransformers

Joint Features of variable autotransformers with added dual-winding transformer

An autotransformer is an electrical transformer with only one winding. In the autotransformer, parts of the same winding function as the primary and secondary windings of the transformer. By uncovering a part of the winding coils and establishing a secondary connection with a sliding brush in our products, we have obtained a continuous variable ratio that allows very smooth output voltage control.

Some of our autotransformers are complemented by a dual-winding transformers, in this case the output is separate of mains.

Joint features of our autotransformers

Transformer is equally designed for
permanent supply of maximal output to the workload. Electronics are placed in rugged metal chassis with Comaxit surface.

One-phase variable autotransformer 

RA1F250.031

Adjustable output voltage <5 ÷ 230 V.

Output current 3.1 A.

Analog voltage meter.

Analog current meter.

Output by socket.

Operation via rotary voltage selector.

Signaling of the switched-on state by an illuminated switch.

Handle for easy carrying.

Robust metal chassis.

Supply voltage:
Output voltage:
Output current:
Output frequency:
Galvanically isolated output:
Voltage meter:
Current meter:
Accuracy of measuring instruments:
Operating temperature:
Mains fuse / circuit breaker:
Output fuse / circuit breaker:
Color:
Dimensions (h, w, d - approx.):
Weight approx:

230 V / 50 Hz
<5 ÷ 230V
3.1 A
50 Hz
NO
analog
analog
1.5% of range
10 ÷ 30 ° C
T 250V / 4A
T 250 V / 3.15 A
black
317 x 282 x 172mm
8.4 kg

One-phase variable autotransformer 

RA1F250.100

Adjustable output voltage <5 ÷ 230 V.

Output current 10 A.

Analog voltage meter.

Analog current meter.

Output by socket.

Operation via rotary voltage selector.

Signaling of the switched-on state by an illuminated switch.

Handles for easy carrying.

Robust metal chassis.

Supply voltage:
Output voltage:
Output current:
Output frequency:
Galvanically isolated output:
Voltage meter:
Current meter:
Accuracy of measuring instruments:
Operating temperature:
Mains fuse / circuit breaker:
Output fuse / circuit breaker:
Color:
Dimensions (h, w, d - approx.):
Weight approx:

230 V / 50 Hz
<5 ÷ 230V
10 A
50 Hz
NO
analog
analog
1.5% of range
10 ÷ 30 ° C
T 250V / 12,5 A
circuit breaker B 10 A
black
360 x 282 x 262 mm
14.8 kg

One-phase variable autotransformer 

RA1F250.200

Adjustable output voltage <5 ÷ 230 V.

Output current 20 A.

Analog voltage meter.

Analog current meter.

Output by power socket.

Operation via rotary voltage selector.

Signaling of the switched-on state by an illuminated switch.

Handles for easy carrying.

Robust metal chassis.

Supply voltage:
Output voltage:
Output current:
Output frequency:
Galvanically isolated output:
Voltage meter:
Current meter:
Accuracy of measuring instruments:
Operating temperature:
Mains fuse / circuit breaker:
Output fuse / circuit breaker:
Color:
Dimensions (h, w, d - approx.):
Weight approx:

230 V / 50 Hz
<5 ÷ 230V
20 A
50 Hz
NO
analog
analog
1.5% of range
10 ÷ 30 ° C
T 250V / 4A
circuit breaker B 20 A
black
360 x 282 x 262 mm
22.2 kg

Three-phase variable autotransformer

RZ3F400.020

Three-phase adjustable output voltage <5 ÷ 400 V.

Output current 2 A.

Galvanic separation of output from mains.

Analog voltage meter.

Analog current meter.

Output by three-phase socket 16 A.

Operation via rotary voltage selector.

Signaling of the switched-on state by an illuminated switch.

Robust metal chassis.

Supply voltage:
Output voltage:
Output current:
Output frequency:
Galvanically isolated output:
Voltage measuring instruments:
Current measuring instruments:
Accuracy of measuring instruments:
Operating temperature:
Power circuit breaker:
Output circuit breaker:
Dimensions (h, w, d - approx.):
Weight approx:

3x 400V / 50Hz
3x <5 ÷ 400V
3x 2 A
50 Hz
YES
3x analog
3x analog
1.5% of range
10 ÷ 30 ° C
circuit breaker D 3x 6 A
circuit breaker B 3x 2 A
468 x 379 x 357mm
40.8 kg

Three-phase variable autotransformer

RZ3F400.060

Three-phase adjustable output voltage <5 ÷ 400 V.

Output current 6 A.

Galvanic separation of output from mains.

Analog voltage meter.

Analog current meter.

Output by three-phase socket 16 A.

Operation via rotary voltage selector.

Signaling of the switched-on state by an illuminated switch.

Robust metal chassis.

Supply voltage:

Output voltage:

Output current:

Output frequency:

Galvanically isolated output:

Voltage measuring instruments:

Current measuring instruments:

Accuracy of measuring instruments:

Operating temperature:

Power circuit breaker:

Output circuit breaker:

Dimensions (h, w, d - approx.):

Weight approx:

3x 400V / 50Hz
3x <5 ÷ 400V
3x 6 A
50 Hz
YES
3x analog
3x analog
1.5% of range
10 ÷ 30 ° C
circuit breaker D 3x 10 A
circuit breaker B 3x 6 A
468 x 379 x 357mm
approx. 84 kg