GU_TRIDENT_V_1_20_EN
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5.2.4
Turn-On and checking connections
Once TRIDENT is plugged in, it is turned-on by placing the marche/arrêt switch in position I.
The red power lamp lights up and the welcome screen appears. If the measurement program has
already begun (if the programmed time is passed), the welcome screen is different (see § Program in
progress).
Pressing the VAL
key calls the principal menu.
M A I N M E N U
- D i r e c t M e a s u r e m e n t s
C o n f i g u r A t i o n
C o n s u l t a T i o n
It is then very worthwhile to look at the instantaneous measurements by TRIDENT in order to
verify its connections. To do so, select the menu “Mesure libre”. The following screen appears :
V A L U E S 1 s e c 1 / 2
V 2 3 1 . 1 2 2 8 . 9 2 3 0 . 4
I 4 . 7 0 5 . 1 8 4 . 1 1
P - 1 0 7 7 1 1 8 0 0 9 4 4
There are 2 successive pages of measurement display. They are numbered and you can return to the
previous page at all times using the
key.
TRIDENT displays the mean measurements over 1 second of the inputs calculated using the
transformation ratios of the TPs and TCs either entered or modified during the last program. These
measures are updated every second.
The first page shows:
the 3 simples voltages V1, V2, V3 in volts or in kilo Volts according to the ratio of the
TPs,
the 3 currents I1, I2, I3 in Amperes,
the 3 active powers by phase P1, P2, P3 in Watts, kW or MW according to the ratio of the
TPs and TCs.
The powers are signed (+/-), allowing verification of the input wiring. A negative power on a phase
means that I is in phase opposition to V, which probably means there was an inversion in the
installation of the current clamps.
Several negative power indications indicate inversion of phases between V and I.
For TRIDENT 3U3I /I :
In the case of currents in excess of the calibrated current (if the current of the secondary of a
clamp exceeds 6A on an at least one phase), the following warning message appears on the 3rd
line. It disappears as soon as the measured current comes down again below 6A :
V A L U E S 1 s e c 1 / 2
V 2 3 1 . 1 2 2 8 . 9 2 3 0 . 4
A l e r t : I m a x = 6 A
P - 1 0 7 7 1 1 8 0 0 9 4 4