Automatic Dielectric Constant Tan Delta & Resistivity Test Set –TDM 4000, Accessories Oil Test Cell, Oil Test Cell Heater, Solid Dielectric Test Cell

Features

• Fully Automatic Dielectric Constant, Dielectric Dissipation Factor & Resistivity Measurement.
• Inbuilt Printer Facility for Test Report Printing.
• Easy Storage of Data.
• PC Compatibility.
• Fully Automatic Operation
• Data Storage 250 test results in inbuilt memory

The TDM-4000 is an automated instrument for measuring the electrical characteristics of transformer oil, insulating liquids & other insulating material samples. The TDM-4000 measures Capacitance, Dielectric Constant (Î), Dielectric Loss, Tan Delta (Dissipation Factor), Resistance & Resistivity of the test sample. The Tan Delta value rates the condition of the oil sample. There are several reasons due to which the Tan Delta value may be affected – such as moisture, dissolved  transformer varnish, insulating material deteriorating, etc.

TDM-4000 is especially designed to work with the IEC & ASTM type oil cell with a 2mm spacing and will apply a stress in the range of 100 – 1000 volts per mm as recognized by ASTM and other specifications.

The model TDM-4000 is a versatile Test Set used for measuring the Dielectric Constant, Tan Delta (DF), Resistivity of transformer oils & other electrical insulating liquids or solid insulating materials in sheet form. The TDM-4000 is only the measuring instrument for testing insulating liquids, it should be used with a three terminal oil test cell. A heater is required if the oil is to be tested at temperatures specified in international or national standards. A suitable solid dielectric test cell is required for testing insulation in sheet form. When excited with an AC source, the TDM-4000 measures the Voltage, Capacitance, Dielectric Loss and Frequency.

Dissipation Factor (Tan Delta) or Power Factor is calculated from the above measurements. To determine the Dielectric Constant (), the measurements are carried out on an empty and a full test cell. The parameters of the test cell can also be entered manually, using the keypad. The operating procedure is menu driven & simple. The AC &
DC test voltages are set using the front panel keypad. Tests can be programmed for the AC test between 200 to 2500 volts and 100 to 1,000 volts for the DC test. After initial set-up, the oil test cell is filled with the oil test sample & the test procedure is initiated. The test set performs all the selected measurements automatically & the results are displayed on the front panel.