Capacitance and dissipation factor measuring systems

Capacitance and dissipation factor measuring systems

Nearly every high-voltage equipment prior to delivery to the customer will undergo a test related to C and tan delta for a final quality control. Such tests are in general made at a frequency for which the equipment is designed. The reasons for the tests are firstly that too high losses (= high tan delta) may cause a breakdown or, secondly, the manufacturer of a specific equipment knows the typical magnitudes which can be tolerated and which provide information about the quality of newly manufactured equipment, and these measurements can also serve for a comparison with later preventive measurements. Such tests are in general made in dependence of the test voltage applied; both magnitudes, capacitance and dissipation factor shall be essentially constant with increasing voltage, as insulation systems are linear systems and any „tip-up“ of the tand with voltage level, called „ionisation knee“, is a preliminary indication of partial discharges in the system which can lead to a failure of the insulation system. TG1 Automatic + manual mode, tan delta uncertainty 10-5 TG3 Automatic measuring bridge. tan delta uncertainty 10-5 TG4 Universal c- and dissipation factor measuring bridge FT12 Automatic capacitence and power factor field test set with 12kV / 200mA Supply. Optional Suplies: Oil Test Cell Resonating Inductor Tan delta simulators Tan delta calibration standards

TG-1

TG-1

TG1 is a capacitance and dissipation factor measuring bridge, featuring manual balancing using analogue zero indicator or fully automatic balancing for high voltage insulation diagnostics, allows precise measurement of capacitance and dissipation factor tan delta uncertainty 1E-5 measures impedances in all four quadrants built-in RS232 interface PC usersoftware available (option) Extra Information Datasheet Front – Hi-Res (740kB)

TG-3

TG-3

TG-3 is a fully automatic capacitance and dissipation factor (power factor) measuring bridge for high precision high voltage insulation diagnostics. uncertainty for dissipation factor (power factor) 1E-5 measures impedances in all four quadrants built-in RS232 interface Options: higher CX current range, PC user software Extra Information Datasheet Front – Hi-Res (739kB)  

TG-4

TG-4

Universal low cost capacitance and dissipiation factor measuring bridge for high voltage insulation diagnostics. very easy to operate capacitance measuring range up to 10’000 x CN measurement of grounded and ungrounded objects tan delta uncertainty 1E-4 test object current up to 10 A automatic interference suppression (option) RS232 interface for data transfer and remote control lightweight unit of only 9 kg Extra Information Datasheet Front – Hi-Res (720kB)  

FT – 12

FT – 12

Full automatic 12kV capacitance and dissipation factor field test set. Consists of two units, weight only 50 kg total. measurements and operation according IEEE standard 62 built-in standard capacitor 100 pF / 12 kV built-in automatic interference suppression tanDelta uncertainty 1E-4 data storage feature: 10 files with up to 50 records each RS232 interface for data download Options: measurement of temperature and humidity; measurement of short circuit inductance of transformers; resonating inductor; oil test cell; adapter for ext. standard capacitors Extra Information Datasheet System Info Front – Hi-Res (711kB)  

Partial discharge measuring systems

Partial discharge measuring systems

Partial discharge (PD) is a electrical discharge that only partially overbridges the insulation between conductors. Generally PD appear as pulses of duration of much less than 1µs.   The significance of PD in the lifetime of insulations has long been recognised. Every discharge event causes a deterioration of the material by the energy impact of high energy electrons and causing chemical transformations of many kinds.     PD-4 Professional partial discharge measuring instrument PD-5 Industry partial discharge measuring instrument Battery Calibrator Calibration standard according IEC 60270 -2000 PD-MUX x-channel PD multiplexer Capacitors Presco AG provides different series of: coupling-, standard air-, solid state- and compressed gas standard capacitors for different applications in high precision high voltage measurements. Technical Information about PD- Measurement Technical Information about PD- Calibrators Technical Information about background Noise  

PD-4

PD-4

Professional partial discharge measuring instrument for diagnosis of high voltage insulation. Fulfils standard IEC 60270 selectable broad band filters tunable narrow band filters combined analog and digital display interference gating with 6 individualy adjustable filters auto calibration and auto ranging phase resolve pattern, in scope- and in finger print mode built-in RS232 interface for transfer of data and phase resolve pattern Extra Information Datasheet Front – Hi-Res (567kB)

PD-5

PD-5

Industrial partial discharge measuring instrument. Fulfils standard IEC 60270 selectable broad band filters. combined analog and digital display. one cable connection. built-in RS232 interface for transfer of data and phase resolve pattern. Extra Information Datasheet Front – Hi-Res (420kB)

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