Insulation testing system S 1800

partial dischargeresistanceground bond

Stators of electric motors must be subjected to an intensive test in production. Only then the stator with the rotor is assembled to an electric motor. Electric drives are produced in large numbers every day worldwide. Here the 3-phase motor prevails in all performance classes. With the help of modern electronics the drives can be powered and controlled. Due to the power electronics the requirements in testing technology have increase significantly. The digital electronics do not produce a complete sine wave and therefore charges the insulation additionally. Apart from the usual high voltage measurement / insulation test therefore also a surge test and a partial discharge measurement (PD) are required. Complex measurement systems for electric motors, stators and rotors must have a standard PC with standard software in WINDOWS technology. Other concepts are not prior art and cannot be integrated in modern production lines. Also for the various measurement / test methods standard components have to be used. For integrated systems the supply of spare parts is difficult and a calibration often impossible. Since it is operated with high voltages and currents suitable cables, socket connectors and relays must be used. Reed relays are not suitable due to their technical structure and present a high safety risk (sticking when over-stressed by currents). Since the workplace design is always customized the interface of the test voltage to the test system must be performed with high voltage / high current connectors. Then all options are open and it is still possible to convert the test system from manual assembly to fully automatic operation.