CIRCUTOR QNA-P Series - Manual (Page 11)

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.