The High voltage transformer is single phase, single pole type & is of double wound resin moulded construction. The H.T. winding is provided with graded insulation such that one end is insulated for 2kV insulation and is earthed through a current sensing transformer & miiliammeter whereas other end isinsulated for full rated voltage & the same brought out through H.T. Cable & spring loaded Prod.
Variable Voltage supply is provided through a Dimmerslat (Variable auto-transformer) havingasuitable rating corresponding to the rating of H.V. Transformer. Dimmerstat Is rated for 230Volts A.C. input & 0-270V output. Limit switch at zero position end of Dimmerstat winding is provided to facilitate the H.T. winding too
Control Circuit & Other Features :
• ManuaIly operated control transformer (VariabIe auto-transformer) with zero interlock facility.
• 72mm sq. double range (0-2kV / 0-5kV) moving coil rectifier type voltmeter of class 1.5, provided to read NO LOAD H.T. Voltage.
• 72mm sq. double range (0-100mA) moving coil rectifier type A.C. Milliammeter of class 1.5, provided in the earth end of the H.T. winding to read H.T. Current.
• Automatic tripping circuit is provided for isolation of supply, in the event of failure of the object under test. Rotary switch with four different settings of 5,10, 50 & 100mA is provided on front panel with LED indication
• M.C.B. for short circuit protection of H.T. transformer & auto transformer
• H.T. ON push button, Mains ON & H.T ON LED indication.
• Range selection switch to select 2.5kV or 5kV range with LED indication.
• Two spring loaded test prods with 1 metre long cable for safe & easy connection of high voltage to test object, (upto 5kV.)
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