HT 400 Series, User Manual

Page: 51 / 88

400 Series
EN - 49
6.7. 123: PHASE SEQUENCE TEST
This function is performed in compliance with standards IEC/EN61557-7 and allows testing
the phase sequence by direct contact with parts under voltage (no cables with insulating
sheath). The following operating modes are available:

1T
one test lead mode

2T
two test leads mode.
Fig. 24: Instrument connection for measuring the phase sequence with one lead, phase 1 connection
Fig. 25: Instrument connection for measuring the phase sequence with two leads, phase 1 connection
1. Press the
MENU
key, move the cursor to
123
in the main menu by means of the arrow keys
(
 ,  ) and confirm with
ENTER
. Subsequently
the instrument displays a screen similar to the
one reported here to the side.
1 2 3
---
1T
Func
2.
Use the arrow keys  ,  to set the measuring mode of the instrument,
which may be:
1T, 2T
.
It is not necessary to confirm the selection with ENTER
.
3. Insert the blue and black connectors of the single cables into the corresponding input
leads N and P of the instrument. Apply the relevant alligator clips to the free ends of
the cables. It is also possible to use the remote probe by inserting its multipolar
connector into the input lead P. Connect the alligator clips, the probes or the remote
probe to the electrical mains according to Fig. 24 and Fig. 25.
4.
Press the
GO/STOP
key on the instrument or the
START
key on remote
probe. The instrument will start the measurement.