www.davidson.com.au - Ceast Polymer Testing Solutions

Designed to determine the dielectric rigidity of insulating polymer materials at commercial voltages in either air or oil bath.
The voltage can be applied according to the three different methods prescribed by ASTM D149.
Voltage range: up to 60 kV or 100 kV, based on the model chosen.
Voltage setting may either be manually controlled or motorized.
Meets ASTM, DIN, UNI, CEI and other similar standards.

Two tests on thermoplastics, thermosetting and other materials can be carried out with this equipment:

a) Dielectric Rigidity- This test is performed by applying a predetermined voltage for a definite time to a specimen fitted between 2 electrodes which are of a specific type and size. If the specimen does not break down electrically in the given time, the apparatus switches off. If however the specimen breaks down before the preset time, the apparatus switches off automatically.

b) Dielectric breakdown (Short time test)- A linearly increasing voltage is applied to a specimen until electrical breakdown occurs. Dielectric strength is given by the ratio between breakdown voltage in test conditions and distance between electrodes. In the case of carrying out the test using a stepped increase of voltage, the dielectric strength is the ratio between voltage applied in the step before the one where the breakdown occurred and the distance between electrodes, which is in practice the specimen thickness.