HT instruments PQA820 - Manual (Page 16)

PQA820
EN – 15
6.3. CONNECTION IN A THREE-PHASE 4-WIRE SYSTEM
CAUTION
 The maximum rated voltage between inputs is 415V AC, CAT IV 300V to
earth. Do not connect the instrument to voltages exceeding the limits given
in this manual
 The rated supply voltage of the instrument (red-yellow terminals) must be
within the range: 100
 415V, 50/60Hz
Fig. 4: Connection of the instrument to a three-phase 4-wire system
CAUTION
If possible, cut out the power supply of the electrical system to be measured
before connecting the instrument.
1. Check and, if necessary, change the basic settings of the instrument (see § 5). In
particular, it will be certainly necessary to set the Three-phase 4-wire mode
2. Connect the supply terminals (red and yellow) respecting the connections indicated in
the Fig. 4
3. Connect the cables of the phase voltages L1, L2, L3, respecting the connections
indicated in the Fig. 4. Connect the blue cable to the system's neutral.
4. If you want to measure currents and powers, connect the clamp meters to the phase
conductors, respecting the direction indicated on the clamps and the connections
indicated in the Fig. 4
5. Connect the electrical system to be measured to voltage in case the system has been
momentarily put out of order.
6. Check that the Error LED is off. In case it is:
 On and flashing , check that the voltages respect the correct phase sequence
 On steady check that the clamp meter is connected respecting the direction
indicated
7. In case a USB or WiFi connection (see § 9) with a device is active on which a
management software is installed, the values of the available electrical quantities will
appear on the device's display. For further information, please refer to the on-line guide
of the management software.
8. If you want to record:
 Check and, if necessary, change the values of the basic parameters (see § 5)
 To start recording, press the START/STOP key (see § 7)