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productsC & tanδ (dissipation factor) measurementUnder the Tettex Instruments label we offer a broad range of precision C & tanδ measuring bridges covering both high and low voltage applications for laboratory, factory, workshop and field use.
2840[ High-Precision C, L & tan δ (Dissipation Factor) Measuring Bridge ]
Accuracy capacitance 0.02%, tanδ 1x10E-5 The High-Precision Dielectric-Loss Analyzing System 2840 is designed for measurement of very low dielectric losses and impedances (Dissipation Factor and Power Factor) of high-voltage apparatus (e.g. extruded insulation on power cables). The instrument works on the principle of a combined bridge-vector-meter and is capable of analyzing capacitive and inductive loads – especially shunt reactors – with outstanding accuracy and stability certified by a leading metrology institute. Advanced software functionalities such as insulation temperature correction, programmable test sequences with pass/fail limits, graphical visualisation of measured data, etc. make this instrument a powerful tool for analysis of high-voltage equipment.
2820a[ C, L & tan δ (Dissipation Factor) Measuring Bridge ]
Accuracy capacitance 0.1%, tanδ 1x10E-4 The Dielectric-Loss Analyzing System 2820a is designed for measurement of low dielectric losses and impedances (Dissipation Factor and Power Factor) of high-voltage apparatus (e.g. the insulation of bushings). The Graphical User Interface of the instrument is highly intuitive, is focussed on convenience with built-in useful programs (e.g. support tool for tuning the external high-voltage supply) and uses a large colour touch screen as the input device.
MiDAS 2880, 2881[ Mobile Insulation Diagnosis & Analysing System ]
Periodic maintenance and inspection of high voltage insulation losses is performed on power transformers, bushings, motors, generators, etc. The MIDAS 2880 is the perfect tool for onsite measurements especially in the harsh electrical environments experienced in substations and other field locations. To analyse condition and quality of high voltage insulation systems the system performs automated measurement of:
2877[ High Precision automatic C, L & tan δ (Dissipation Factor) Measuring Bridge ]
The measuring system 2877 is designed for highest precision determining the capacitance and dielectric dissipation factor tand of liquid and solid insulants, cables, capacitors, line transformers, generators, motors, bushings etc.Furthermore it can also be used for power loss measurement on shunt reactors or similar apparatus. The system performs automated measurement of:
3320[ Standard Air Capacitors ]
These standard fixed and variable capacitors are especially for precision measurements of high accuracy. Because of their high insulation resistance, small self-inductance and dissipation factor, these standards may be used within large frequency ranges up to very high frequencies.
3370 NK[ SF6 filled high precision Standard Capacitors ]
The SF6 gas insulated standard capacitor is used together with a C and tan delta measuring bridge as the comparison standard leg of the bridge. This capacitor design is used as a calibration standard for high voltage laboratories and metrology national institutes for decades. Highest long-term stability is guaranteed and proven over 60 years.A wide range of different sizes, values and voltage ranges are available.
3388/100/25[ Compressed gas standard Capacitor ]
The compressed gas standard capacitor is an indispensable instrument in every high voltage laboratory and test field where it occupies a wide range of important functions. The compressed gas capacitor is used as capacitance standard in bridge circuits to measure the dielectric dissipation factor tan d, the dielectric constant er respectively the capacitance of cables, ducts, insulators, transformer windings and insulates.
3721 & 3723[ Dissipation factor tan d standards ]
Dissipation factor tan d standards are designed for checking the accuracy of capacitance and dissipation factor measuring instruments. A tan d standard is basically a standard capacitor in series with a resistor. To avoid excessive resistance values, a 1000 pF capacitor with a negligible dissipation factor should be used. The resistance units have to be calibrated together with the standard capacitor (not incl. in scope of supply).
5286 / 5287[ Current Booster ]
Current Booster (current multiplier transformer) for MIDAS 2880 to increase the output current of the MIDAS HV supply.
5289[ Resonating Inductor ]
15kV Automatic resonating Inductor used together with MIDAS for testing very high capacitance values up to 1.56uF e.g. for testing of large power generator windings.
5288A[ Resonating Inductor ]
10kV (*12kV) Resonating Inductor used together with MIDAS for testing very high capacitance values up to 1uF e.g. for testing of large power generator windings.
6835[ Rugged Test Cell for liquid insulants ]
Rugged test cell for on-site measurements on liquid insulation samples normally used together with MIDAS 2880.The cell itself is stored in a sturdy transportation shell case.
4761, 4764[ Standard current transformers (comparators) ]
The 4761 and 4764 high precision standard current comparators are used as comparison standard in the differential method (bridge) measurement of current instrument transformers together with the measuring instruments type2763 and 2767.
4762[ Current Comparator ]
Current Comparator (current divider transformer) used together with 2820 or 2877 instrument to expand the maximal measuring current range of 15A.
2903, 2903a[ Precision Test Cell for liquid insulants ]
This precision test cell measures the dielectric properties of liquid insulants like insulation oil etc. The test cell is designed as a vacuum-sealed cylindrical capacitor (2903) with shielded measuring electrode. The cell itself is inserted into a heat able pot (2903a) with all necessary measurement connections.
2905[ Pilot Cell for Liquid Insulating Materials ]Tettex has developed this precision pilot cell for the accurate determination of the dissipation factor tan d and the conductivity of liquid insulants, such as insulating oil, aso. For measurements at constant or varying temperatures, the pilot cell can be oven-controlled or oil-immersed. All metal parts are made of stainless steel. In order to avoid stray capacitances, the pilot cell is equipped with a shield.
2914[ Precision Test Cell for solid insulants ]
This precision test cell measures the dielectric properties of solid insulants like paper, plastic foil, etc. Basically the test cell consist of a heat able, shielded plate capacitor which is protected by a bell jar and can be evacuated and filled with protective gas.
2967[ Temperature Control Unit for test cell ]
This temperature control unit is used to regulate the desired temperature of the solid insulants test cell 2914 and the liquid insulants test cells 2903. The temperature range can be set up to 300°C
2973[ Vacuum Pump for test cell ]
This test cell vacuum pump is used to evacuate the test chamber (bell jar) of the solid insulants test cell 2914 and the liquid insulants test cell 2903. The unit with all indicator instruments and operating buttons is built into a case with wheels for easy handling in the laboratory.
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