Water cooled chokes

Chokes with indirect water-cooling systems use in addition to natural air cooling the forced water cooling of windings and core. This type of chokes has a special insulated cooler which is placed between windings or fixed to the core. This cooler is made of copper pipe with a diameter which ensures adequate flow of cooling medium. Such a solution with high efficiency cooling factor helps to reduce the size of the transformer and allows to evacuate the heat losses outside of the swichtbox.

Product for:


Design Chokes are produced in accordance with standards:
EN/IEC 60076-6; EN/IEC 61558-2-20
Insulation class

F(155oC) - standard

Climatic class
/ Environmental class

C1/E0 - land design; C2/E1 - maritime design

Ambient temperature 40oC
Protection degree IP 00
Cooling AN / WF
Frequency of 1-st harmonic 50 Hz
Rated voltage 1000 V
Overload 110% In
Terminals screw terminal blocks or cable lugs or copper bus bars
Fastening by means of angles


Technical sketch

Sample  design
Exemplary design


Dimension table

Technical data of chokes with indirect water cooling system are to be agreed before placing an order

Configuration of the housing determined according to individual customer needs. Please contact our sales department or fill out our inquiry form.

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