High Power Voltage Variators
VARIABLE TRANSFORMERS FOR HIGHER POWER RATINGS
The variable transformers allows to obtain an alternating voltage smoothly and continously variabIe from zero to the line voltage or even higher.
All described models are motor driven, realised on request in enclosed construction and with output protected against short circuits and overcharge.
Are available also with voltmeters, ammeters, and power meters
SPECIAL VOLTAGE AND POWER RATINGS ON REQUEST
1 Phase High Power Variators

MOD

Output V

Current

Power VA

ITVMC40

0-230V

40A

9k

ITVMC50

0-230V

50A

11k

ITVMC80

0-230V

80A

18k

ITVMC100

0-230V

100A

25k

ITVMC200

0-230V

200A

46k

ITVMC300

0-230V

300A

70k



CLICK to send detailed request with characteristics and prices

3 Phase High Power Voltage Variators

MOD

Output V

Current A

Power VA

ITTC50

0-400V

50A

30k

ITTC80

0-380V

80A

50k

ITTC100

0-380V

100A

70k

ITTC200

0-380V

200A

130k

ITTC300

0-380V

300A

200k


CLICK to send detailed request with characteristics and prices

Construction:
Manufacturing standards designed and tested according to VDE-0552 and IEC 61558-2-14; designed as toroidal auto transformer under quality system UNI EN ISO 9003

Core
All regulators use grain-oriented strip would silicon steel cores ensuring low losses and reduce magnetising current.

Windings
The windings, which is insulated from the core by precision moulded winding formers, comprises a single layer (class H wire) carefully wound to provide a flat surface for the brushgear.

Brushgear
Easily replaceable carbon units are used, the resistance of the brush being carefully calculated to limit the current circulating in the bridged turns.
It is therefore most important that only the correct replacement brush is used in any particular Brushes are mounted in robust brush carriers insulated from the shaft, and designed so that metal parts cannot come into contact with the winding in the event of brush fracture.

Frames
The wound core and brush gear are mounted on a cast aluminium frame providing strenght combined with minimum weight. The base incorporated mounting holes providing interchangeable fixing centres with many other variable auto transformer.

Rated Current:
output current that can be draw at any brush setting for a continous duty.

Ambient temperature:
current ratings apply up to 45C ambient.

KVA Rating:
the maximum output current at maximum output line voltage multiplied by that max voltage and divided by 1000 for single-phase. Divide by 577 for three-phase (1000/V3)

Line-Voltage and over-Voltage connection:
with line-voltage connections, the supply is connected across the whole winding, and the maximum output equals the applied voltage.
In over-voltage connection, the supply is applied to a tapping provide instead of to the whole winding, giving e.g.:0-280 Volt from a 220 Volt supply.

Insulation:
All variable transformers are flash-tested at 2,5KV.rms 50 Hz.

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Copyright © 1995, italtec srl.