Catalogs >
Haefely AG >
2914 Solid Test Cell

2914 Solid Test Cell
3Pages

Catalog excerpts

2914 Test Cell for Solid Insulates The newly developed test cell is used for dielectric tests, i.e. It determines dissipation factor tan and dielectric constant r on test objects of solid insulates such as paper and plastic foils, as well as the specific resistivity. The test cell is equipped with a shielded measuring electrode (guard ring) which eliminates partial capacitances which influence the test results. The heating-up time is short This new design is the result of longstanding experience in the field of test cell building. It has been designed in accordance with VDE specifications 0303, 0311, 0345 (Fed. Republic of Germany), the ones of SEV (Switzerland), and the recommendations of CIGRE, IEC and ISO, as well as with ASTM standards (USA). The measuring electrode can be removed from the test MEASURING INSTRUMENTS Measurements can be carried out under protective gas High precision C, L & tan Measuring bridge type 2840 C, L & tan Measuring bridge The test cell is heatable Object while the bell-jar is on unit The pressure acting against the test object can be adjust from outside and monitored at any time The test cell can be evacuate The test cell can also be used for impregnation purposes The test cell is in accordance with international Standard capacitor, 100 pF Dimensions Weight COMPLETE TEST SYSTEM For dielectric measurements on test objects of solid insulates Tettex offers complete test systems. Dissipation factor tan measurements are carried out most efficiently with the complete dissipation factor and capacitance measuring bridge with resonant power supply type 2821. Other measuring equipment is listed under „order specification“. Always check suitability of the equipment for the considered test cells. It should be noted that the power supply used must have a lower short-circuit power characteristic (e.g. a resonant power supply). To heat up and to evacuate the test cell, we recommend our temperature controller type 2967 and our reliable vacuum pump type 2973.

Open the catalog to page 1

TECHNICAL SPECIFICATIONS Test surface Diameter of measuring electrode Electrode material Finish Heating capacity Electrode temperature Heating-up time Temperature control: Electrode pressure Max. test voltage Measuring frequency Test cell evacuation up to (If the test cell is ordered after the purchase of the measuring equipment, please indicate type of measuring bridge and power supply.) OPTIONAL SUPPLY stainless steel, hardened lapped 2 heating plates of 630 W each, 1260 W together ambient temperature ... 250° C, max. 1 h...300°C 15 min. with temperature controller type 2967 2 0...10 N/cm...

Open the catalog to page 2

AUTOMATIC MEASURING INSTRUMENTS DESIGN FEATURES Fully automatic precision measuring bridge Type 2840 Basically, the test cell consists of a heatable, shielded plate capacitor (guard electrode capacitor). The heatable high-voltage electrode is insulated and mounted on the base plate. Two different types of electrodes are supplied: a flat one, and one with raised rim for impregnation. The measuring electrode is equipped with a guard ring and shielded. This separate unit with built-in heating is mounted on a support and can be moved vertically. The vertical movement is carried out from outside...

Open the catalog to page 3

2914 Solid Test Cell 3Pages

Catalog excerpts

All Haefely AG catalogs and technical brochures

2914 Solid Test Cell
3Pages