Transducers for phase angle (COS φ)
• Class 0,5
• For mounting on DIN rail (DIN EN 50 022)
This equipment conforms to the requirements of the Directive from the Council
of the European Community on the harmonisation of the member states regarding electromagnetic compatibility, EMC Directive 2004/108/EC, as
well as Low Voltage Directive 2006/95/EC
The measuring transducer Phwd-MU serve to convert and isolate the phase
angle between current and voltage of an AC and three-phase mains of balanced load into a load-independent direct-current and direct-voltage signal.
The quantities to be measured will get via internal current transformers and
voltage divider to the null comparator. At the null comparator there is a rectangular signal which is directly connected with the phase angle. A subsequent integrating step forms the direct-voltage mean value. This direct voltage
will be converted into a load-independent direct current and into an impressed direct voltage. The galvanic separation between input and output signals
is effected by means of an optocoupler. The secondary amplifiers will supply
the load- independent direct current and direct-voltage signals. Both outputs
are no-load resistant and short-circuit proof. Any connection between both
outputs will be unacceptable. An auxiliary voltage will be required.