Information on grid monitoring on the input side

Using the measurement data recorded on the input side in object 0xFA14 "PSU Diag Data", it is possible to monitor the mains voltage over a longer period of time. Creeping changes and quality problems can thus be detected at an early stage and prevented with suitable measures before they become a problem for the power supply or other connected devices.

RMS input voltage

The AC input voltage is determined with an effective power measurement. In the nominal voltage range of 85 - 264 V AC, an average value is calculated over 10 mains periods.

Undervoltages and overvoltages

A supply voltage that is too low or too high at the input can be detected using the PS2001-xxxx-1001 power supplies.

The devices themselves are largely protected against voltage fluctuations within the nominal voltage range, as the wide-range input 100 - 240 V AC (-15%, +10%) in the device ensures that the 24 V DC (PS2001-24xx-1001) / 48 V DC (PS2001-48xx-1001) output remains stable even in the event of major deviations in the supply voltage.

The undervoltage range begins when the voltage falls below 75 V AC and is exited again when it exceeds 85 V AC. A hysteresis of 10 V AC is stored here. There are two measuring principles within the undervoltage range:

• from 0 - 65 V AC: effective power measurement over ½ mains period
• from 65 - 75 V AC: effective power measurement over 1 mains period

The overvoltage range begins when 274 V AC is exceeded and is exited again when the value falls below 264 V AC. A hysteresis of 10 V AC is stored here.

Peak voltages are measured up to a level of 700 V.

Rapid overvoltages and transients

Rapid overvoltages and transients are also detected by the PS2001-xxxx-1001 power supplies. For example, the VDE-0160 pulse and surge pulses from 750 V are detected.

Measuring times of the effective power measurement as a function of the input voltage

Device-specific transmission times of typically 3 ms and the set cycle time are added to the measuring times.