Q.series - High Voltages, High Isolation
Future concepts for propulsion focus on electric and hybrid drives. Measuring the power fed to the drive and the power returned to the battery requires measuring modules capable of detecting very small signals at high voltage potential, e.g. an individual cell voltage on cascaded cells of a battery.
In addition to drive technology, measuring high voltages is also a primary point for measuring the quality of a network.
Q.series Module A123
4 Voltages in measuring ranges of 100 mV, 1 V or 10 V at DC voltage potential of 1200 V (short-term 5 kVDC).
Measuring rate 10 kHz, Resolution 24 bits.
Q.series Module A124
4 Thermocouples, at DC voltage potential of 1200 V
(short-term 5 kVDC). Measuring rate 100 Hz, Resolution 24 bits.
Q.series Module A128
4 Inputs for voltage measurement in measuring ranges 40 V, 120 V, 400 V and 1200 V, resolution 24 bits.
Measuring Rate is Decisive
To obtain sufficiently precise information on the network quality it is usual to scan the network voltage at a rate of 210 (1024) times the network frequency. At 50 or 60 Hz this means scanning rates of 51.2 kHz or 61.44 kHz.
The A128 module measures signals from 4 channels at a scanning rate of 50 kHz and from 2 channels at a rate of 100 kHz. The measured data for a transient is buffered in a test controller and then transferred.