PRODUCTS & SOLUTIONS
- Measuring and Test Systems
- Engineering Services
- Catalytic Converter Measurement
- Wafer Edge Profile Measurement
- Vacuum Inspection
- Training Courses
The Q-U protection function can be tested fully automatically with the QU-Monitor which supports various different response characteristics for the Q-U protection function implemented by the manufacturers of protection devices.
As well as verifying the operating characteristic, it is also possible to check the starting and reset values of the protection relay for the undervoltage threshold, the minimum current, the minimum reactive power and the angle range of the reactive power direction. Selecting a fault loop makes it possible to reproduce phase-selective fault types too. This allows the undervoltage threshold and the function of the logical AND-link to be checked in one test step.
Test points can be defined either graphically or numerically in the P/Q diagram. The software automatically calculates the test values, taking the configured start and end values and the defined test conditions into account, and issues them in the form of a stair-step pulsed ramp. The reaction of the device under test is recorded in real time during the test and subsequently evaluated and logged.