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VARIABLE AUTO-TRANSFORMERS SINGLE-PHASE CURRENTS:
They are used as well for testing equipments as for permanent installations. The output voltage is controlled by a serrated roller of adjustment. Control precise, possibility of higher output voltages on request (step-up transformer). All our models are studied to resist high temperatures, moisture and the shocks/vibrations mechanical.
THREE-PHASE VARIABLE AUTO-TRANSFORMERS:
Connection out of star or triangle side primary education and secondary. They are delivered star-connected and have an accessible neutral point.
VARIABLE AUTO-TRANSFORMERS MOTORIZE:
A synchronous motor is used to position the cursor; the engine is reversible thanks to a switch (not provided) and functions under 24VDC or 230VAC. Integrated switches of end of the road. We can also propose a chart of engine control 0-10VDC.
VARIABLE AUTO-TRANSFORMERS HOODS:
Entirely hooded, which offers a protection against the physical accidents and other problems. Generally they are used everywhere where an adjustable alternating voltage is necessary. The output voltage is controlled by a serrated roller of adjustment. The output voltage increases in a linear way when one turns the serrated roller in the direction of the needles of a watch. All the models are equipped with a cord with food and a luminous switch ON/OFF. Indication of the output voltage in volts on graduated disc.
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Slip Ring Motor Starter
Magnastart
Magnastart is a unique Inducer system for starting slipring induction motors, offering considerable improvements in maintenance, reliability and cost-effectiveness. Magnastart is used extensively both as a component in new equipment and as a quick and effective replacement for existing resistance and liquid starters. Wide flexibility of tappings allow the impedance to be matched on commissioning. Magnastart has been used with crushers, pumps, fans, conveyers, cranes, mills and presses.
Magnastart Features
- Size: Though physically smaller than conventional systems of resistors and contactors, the large thermal capacity of Magnastart permits the starting of difficult and high inertia loads without problems
- Simplicity: Magnastart requires only one shorting contactor, reducing the system complexity, size and cost
- Performance: Magnastart is ideal for inching, reversing, and plug braking without any additional rotor controls
- Maintenance: Magnastart Inducers have no moving parts, and do not use liquids or chemicals. Magnastart will give many years of service without any maintenance or adjustment
- Reliability: The robust construction permits heavy usage under the most arduous conditions. Built-in thermal cut-out provides protection against damage
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The Pauwels Group is a full-line supplier, offering a wide product range of transformers like :
autotransformers up to 700 MVA/525 kV
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Using an auto-transformer is always an economical solution when you need to step down the voltage from 230V to 120 V or vice versa, and the equipment already has a fully isolated transformer or when the components do not require an isolated transformer.
The toroidal construction of an auto-transformer offers important advantages in comparison with an E/I lamination core transformer, like smaller physical size and weight, 30-70% reduction (depending on secondary voltage) and very low magnetic strayfields. The auto-transformer can be mounted horizontally using a steel washer or our Poly-Mount, a plastic insert, or an epoxy potted center with a 1/4" mounting hole.
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Autotransformer VT-EN Range
Common input and output windings without electrical isolation
Designed for continuous duty
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