Tabla de contenido
Idiomas disponibles
Idiomas disponibles
3. INSTRUCTION for the USE
3.1 ELECTRICAL CONNECTION
have to be of 2,5mm
Fig. 1
The external connection
• It is very important to
ensure correct
connection of the CT
(in L1 phase upstream
of the load and phase
shifting capacitors)
and the voltage
connection (on phases
L2 and L3), as shown
in the schematic
below, in order to
ensure a correct
measurement of the
unit.
MPR8
Number of
Label of
terminal
terminal
1
P2
2
P1
3
X1
4
X2
5
C
6÷13
8÷1
14
A
15
A
16
V
17
N.C.
18
V2
3.2 MECHANICAL FIXING: t
using the special fixings supplied.
3.3 POWER of CONTROLLED BANKS:
switching on and off of capacitors banks always start from the first bank. For correct operation of the
automatic bank, the power ratio per bank should be:
a. equal to each other
b. double of the previous bank
c. equal or double of the previous bank
3.4 NUMBER of STEPS:
is determined by the power combination which has been used on single capacitors bank:
Examples:
6 banks in the sequence 1-1-1-1-1-1
6 banks in the sequence 1-1-2-4-4-4
6 banks in the sequence 1-2-4-8-16-32 make 63 steps
Note. Where the step sequence is uneven too high a number of steps will result in a high number of switching
operations, which will considerably reduce the life of the equipment. With the first step too high hunting may
occur which again would produce excessive wear and reduced life of the components.
•
NORMALLY 8-16 REGULATIING STEPS IS THE BEST SOLUTION TO ADOPT
: by means of plug connector with terminal fixing screws for the cable
2
section, mounted in the base of the regulator.
N.O. 5Amps - 250Vac clean contact (resistive load) to be used for control the panel ventilation
fans.
N.C. 5Amps - 250Vac clean contact (resistive load) to be used for remote alarm signalling.
Separate supply required (see chapter 7. ALARMS).
Common terminal of relays. To be connected to 220Vac auxiliary transformer.
Note: Protect connection with external fuse max. 4Amps.
Connection to contactor coils (from 8
Connection to secondary of C.T.
C.T. = Current Transformer with 5Amps secondary (see chapter 3.)
Connection to
0Vac - Protect with external fuse.
Not connected
Connection to 380Vac - Protect with external fuse.
he regulator should be mounted in a cut-out (drilling template 138x138mm.)
the regulator works according to binary logic sequence; the
(1-1-1-1-1-1-1-1)
(1-2-4-8-16-32)
(1-1-2-2-4-4)
Description
th
st
to 1
bank).
make 6 steps
make 16 steps
11
Tabla de contenido
