Page no.
10
5.2.-
QNA-412 analyzer start up.
Before connecting the equipment to the mains please bear in mind the
following points:
1)
Supply system voltage:
Voltage:
63 – 520 V AC.
Frequency: 50... 60 Hz.
2)
Earth: The equipment must have the earthing cable connected. If it is not
attached, some of the equipment's protection will become ineffective.
3)
Maximum current in the voltage measurement circuit: 500 V AC. between phase
and common:
4 wire configuration: 500 V AC Neutral-phase / 866 V AC. phase-phase.
3 wire configuration: 500 V AC. phase-phase.
4)
Maximum measurement current:
According to CLAMPS USED. In / 2 V AC.
5)
Maximum measurement current:
According to CLAMPS USED. In / 2 V AC.
6)
Equipment consumption: 16 W.
7)
Operating conditions:
•
Operating temperature: 0º to 50º C.
•
Operating humidity: 25% to 75 % RH.
8)
Safety: Designed for category III installations according to EN 61010.
Points to check during installation:
8) Check that the earth has been connected to avoid interference to the equipment.
Not attaching the earth reduces the effectiveness of the QNA-412's protection.
9) Check the power measurements and their sign (Check the polarity of the current
transformers).
10) Check the QNA-412 analyzer setting.
Please note
A symptom of poor installation or wrong setting is the measurements
flashing
on the display. The causes may be:
−
The equipment has detected an event. This may mean that there has
actually been an event on the line (correct installation) or that the pre-set
nominal voltage does not match that of the system.
−
If
dashes appear on the balance screen:
it means that the sequence of
the phase turn is wrong.
