Autotransformer Single-phase 400V / 230V

Autotransformateur Monophasé 400V / 230V,Autotransformateur Monophasé 400V 230V
Primary : 400V   -   Secondary : 230V
Ref : 1A251-TN-J544-C
Price : 126,00 €
Disponibilité : 1 to 2 weeks

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This single-phase autotransformer 400V to 230V is ideal for converting 400 Volt single-phase voltage to 230 Volt single-phase when the latter is unavailable in an installation. The advantage of the autotransformer lies in its cost and reduced size compared to an isolation transformer. However, note that to use an autotransformer, galvanic isolation must not be required for your installation.

Naturally, as Le Cosinus manufactures its own products in its workshops, we can adapt our autotransformers to all voltages according to your needs. All our single-phase autotransformers listed on this website are available in a wide range of power ratings, in bare (IP00) or enclosed (IP2X) versions.

Note: we also offer reversible autotransformers. This means they can be used in both 400V-230V and 230V-400V configurations.

But as always, we can perfectly adapt our products with weatherproof enclosures, meet numerous requirements such as improved harmonic tolerance, a UL/CSA certified insulation system, adjustment taps and much more, via a specific request.

Technical details

Image des cotes
Input / Primary
400V
Sortie / Secondaire 1
230V 1.1A
Winding material
Copper
Nom. Power
250 VA
Dielectric P/E (V)
2 500V
Dielectric S/E (V)
2 500V
Insulation class
I
Frequency (Hz)
50-60Hz
No-load U₂ (V)
243,6V
RoHS Compliant
Yes
Lifting Ring
No
Option_Screen
No
Dimensions: L x W x H (mm)
84 x 90 x 90
Mounting: X x Y x Ø (mm)
64 x (56.8 - 67.4) x 4.7
Weight (kg)
2
Ventilation Clearance (mm)
30
Prim. Protection (rec.)
DJ - Courbe D - 2 A - 2 Poles

Notes and options

General Specifications

  • Rendement de 95 à 98 % suivant puissance.
  • Faibles pertes et faible chute de tension, de 2 à 3% suivant puissance.
  • High-quality vacuum impregnation.
  • Operating temperatures of 35°C or 40°C.
  • IP00 or IP21 with textured paint on RAL7035 enclosures.
  • Connections via terminal blocks or busbars depending on power rating.
  • Temperature rise class: B, F or H depending on reference.
  • Copper or aluminium winding depending on power rating.
  • Environmentally friendly: RoHS compliant and solvent-free varnish.

Available Options

  • Addition of electrical protection (circuit breakers, fuses, isolators).
  • Voltage adaptation up to 1,000V.
  • Addition of adjustment taps.
  • Addition of temperature sensors (NC, NO or PT100).
  • Adaptation to higher frequencies (400Hz).
  • Adaptation for harmonics (K-factor K7, K13 etc.).
  • Adaptation to extreme ambient temperatures.
  • Variable IP rating (IP00 to IP55).
  • Addition of silent blocks, casters, rollers.
  • Enhanced tropicalisation.
  • Special paint for enclosures.
  • Custom design for tailored dimensions.

⚠ Important note: Some of the options you may select could affect the dimensions and weight of the autotransformer. Please contact us for further information.

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