Page no.
5
The parameters that the QNA-412 can measure are:
Parameter
L1 L2 L3
Voltage X
X
X
Current (2V input)
X
X
X
Frequency X
Active power
X
X
X
Inductive reactive power
X
X
X
Capacitive reactive power
X
X
X
Apparent power
X
Active energy
X
Inductive reactive energy
X
Capacitive active energy
X
Power factor
X
X
X
Voltage THD
X
X
X
Current THD
X
X
X
Harmonic Decomposition of voltage
X
X
X
Harmonic Decomposition of current
X
X
X
Voltage wave form
X
X
X
Current wave form
X
X
X
Neutral Current
X
Earth neutral Voltage
X
Flicker (PST)
X
X
X
Dips X
X
X
Interruptions X
X
X
Overvoltage X
X
X
Unbalance X
Assymetry X
All these parameters are measured and recorded when the installation is
consuming or generating energy.
2.2.-
Electrical characteristics.
Due to the fact that the QNA-412 is electrical supply quality recording
equipment, it must have a high degree of protection under severe electrical
conditions:
•
High energy varistors for absorbing overvoltages and protecting the
equipment from costly repairs.
•
Noise filter on the voltage input: Allows reliable measurements to be
obtained under the most adverse noise conditions.
•
Power supply: transformers with higher power dispersal and isolation.
•
Power supply from batteries allowing the QNA-412 to operate in the
absence of voltage supply.
•
Isolating transformers to ensure input isolation.
