--
ANALYZER OF THE QUALITY OF ELECTRIC POWER SUPPLY
QNA-303 --
Page
9
5.- INSTALLATION & STARTUP
The manual you hold in your hands contains information and warnings
that the user should respect in order to guarantee a proper operation of
all the instrument functions and keep its safety conditions.
If the instrument is not used as manufacturer’s specifications, the
protection of the instrument can be damaged. Notice that with the instrument
powered on, the terminals could be dangerous to touching and cover opening actions
or elements removal may allow the access to dangerous parts.
When any protection failure is suspected to exist (for example, it presents
external visible damages), the instrument must be immediately powered OFF.
In this case contact a qualified service representative.
5.1.- Selecting the connection mode
The
QNA-303
is a fully user-configurable instrument in terms of the kind of
network to be monitored and the supply voltage of the analyzer.
The
QNA-303
can be indistinctly installed in a three-phase distribution line with
neutral conductor (4 wires) or without neutral conductor (3 wires). According to the
system, the
QNA-303
voltage supply will have to be also properly selected between
230 V~ or 400 V~, depending on the existence or not of the neutral conductor.
The choice of the voltage supply and the connection mode is carried out by
means of some bridges placed inside the
QNA-303
casing. Please always check the
appropriate position of this bridges before connecting and powering the
QNA-303
.
Before any adjustment operation is carried out, the QNA-
303 must be completely disconnected from any power
supply source.
*(
D-
1)
*(
D-
2)
M2
*(
D-
3)
M3
M4
*(
D
-6
)
*(
D
-7
)
M5
M6
PF
8
PF
6
PF
7
PF
5
PF
4
PF
2
PF
3
PF
1
*(
C
-3
)
*(
C
-1
)
M7
M8
*(
C
-2
)
*(
B-
3)
M9
M1
0
*(
A-
3)
*(
B-
1)
*(
B-
2)
M1
1
M1
2
M1
3
*(
A-
2)
*(
A-
1)
M1
4
M
15
*(
X-
N)
*(
X-
N
)
*(
X-
N
)
(T
IE
RRA
)
*(
D-
4)
MO
D
EM
3 / 4 WIRES
CONNECTION
TERMINAL
POWER SUPPLY
CONNECTION
TERMINAL
