www.powerelectronics.gr
MODELS:
SE-1C08, SE-1C08HV, SE-1L08, SE-1L08HV, SE-1C40, SE-1C60, SE-1C80
THREE PHASE CONNECTION & WRONG PHASE SEQUENCE INDICATOR
1)
The right suggestion of the phases is a must for the normal function of the AVR.
If the bars are marked
(R, S, T) or (U, V, W)
we follow the marks, if they are not, then we take
the middle bar as
"S" or "V"
and connect it to terminal
"4"
of the AVR
(important).
If we use current transformer its mandatory to connect it to this specific phase also
(important).
2)
On the AVR behind of the black terminal there is an orange neon lamp. When we start the generator
and it builds up voltage, if the orange neon lamp is lit up that means that the connection on the bars
(R, T) or (U, W)
is
wrong
and we must swap the position of two out-side wires
(R-T) (or U-W).
3)
The orange neon lamp absolutely must never lit-up
(important).
CURRENT TRANSFORMER CONNECTION
1)
It is
necessary
that the current transformer
must
be connected to the phase that also goes
to terminal
"4"
of the AVR.
2)
The current transformer has from one side
the letters
K (or P1
and on the other side
L (or P2).
From the side,
K (or P1)
enter the bar from the
generator and as it exits from the
L (or P2)
it is going to ACB i.e. to main switch of the generator.
The two-connecting point of CT have the letters
k-l (or s1-s2)
and correspond respectively with
7-6
of the AVR.
The current ratio of the CT is:
GENERATOR AMPERES
FOR FIVE AMPERES
CONNECTING EXTERNAL VOLTAGE POTENTIOMETER
The connection of the external pot does not need any polarity because it is doing the work of a rheostat.
The value is always 500 Ohms.
EXCITATION POLARITY
The correct polarity of the feeding DC current to the exciter from the AVR J-K is a must otherwise the
exciter will be demagnetized and will not build-up any voltage. If that happens we have to re-magnetize
the exciter so
after we disconnect the J-K cables from the AVR
and while the engine has the right periods
we connect (with the right polarity) a
12V
car battery to the generator side exciter J-K for about
15 minutes
.
After the re-magnetization, we can restore the J-K connections to the AVR.
WRONG CABLE CONNECTION MUST BE AVOIDED
