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MU02.06 MMM REV.5 11/05
1. GENERAL
The G3E series, P.F.C. equipment is suitable for the centralized P.F. regulation of industrial and civic loads. It may be installed to
completely eliminate charges made by Electricity Authorities for any reactive energy used, to reduce the losses for the Joule effect
and the voltage losses on the conductors, to take advantage of electrical machines and existing power lines.
TECHNICAL DATA
Rated voltage see the catalog
Rated frequency 50Hz (60Hz upon request)
Protection degree IP30 (IP40 and IP54 upon request)
Protection degree with open doors IP00
Paint RAL7032 (other on request)
Type of service continuous for indoor operation
Max. temperature range Ambient -25 / +40 °C
Ventilation Natural
Cable entry From the side (upper part)
Voltage of the auxiliary circuits (other on request)
230 V type 230, R15, B3, B5 - 380 V type B15, B35, B50
Max. capacitors losses 0.4 W / kvar
Capacitors: they are manufactured by self-healing metallized polypropylene film. They are approved IMQ (MK-AS type). They are fitted
with overpressure disconnector and discharge resistor. PCB free.
Insulating voltage see the catalog
THD(I) max. harmonics distortion of current allowed on the capacitors see the catalog
REGULATOR
Type of measurement varmetric
Amperometric signal (ratio) By Current Transformer with max. 5A output – Customer care
Voltmetric signal 230Va.c. / 415Va.c. from inside cubicle
Switching on/off times 25” - (5” upon request)
REFERENCE STANDARDS
Capacitors CEI EN 60831-1/2 ; IEC 831-1/2 ; UL810
Equipment CEI EN 60439-1; IEC 439-1
HOW TO CHOOSE THE CURRENT TRANSFORMER (C.T.)
• Use a Current Transformer (C.T.) with 5A at secondary circuit and primary equal or slightly higher than the maximum absorbed
by the loads. The C.T. must be chosen in such a way to obtain a good current signal in the secondary circuit. Current values
between 0.5 and 5Amps are suitable to give good working conditions of the regulator.
• The C.T. must be of good quality (first class) and with power equal or higher to 2VA. If the C.T. has been mounted far from the
equipment, it needs to add the normal demanded power consumed from the cables of connection (normally 0.2VA per meter of
bifilar lines with 2.5mm
2
section) and the power dissipated by others possible devices connected in the circuit.
• When single-phase inductive loads are connected (unbalanced three-phase system), place C.T. on the phase where Power
Factor is lower and/or where higher current value is absorbed.
• The cables at the secondary of C.T. have to be of 2,5mm
2
section.
• The C.T. connection must not to be protected with fuses or interrupted by switch.
• The C.T. has to be connected to the line, upstream of the load and the P.F. Regulator: the C.T. can measure the current
demanded by the load, inductive or capacitive. Possible capacitors for fixed P.F. regulation will be mounted on downstream of
the C.T., as they aren’t used and dimensioned for the P.F. Regulation of transformers that feeds the load.
• It’s important to check that the phase where the C.T. is connected, is the same that the one connected to terminals of the main
switch, inside the equipment, signed with the letter “R” (L1).
• Before doing any work on the C.T. circuit, be sure that the C.T. is short-circuited, otherwise dangerous voltages can rise and
bring to breakdown the C.T.
• Connecting two or more cables (for load and P.F. Regulator) on the same terminal - phase “R”(L1) - from the main switch, it
needs to lead through the hole of the C.T. all these derived cables.
ENVIRONMENT
The equipment is for indoor operation and for well ventilated environment; elevated temperatures considerably reduce the life of
the internal components, particularly of the capacitors (consult the brochure ED.02.55 ING “Recommendation for the safe use of
static capacitors banks and equipment for power-factor correction”). The power-factor regulator is built for the installation to wall
and it is endowed with sides air vane that allow the free air circulation.
CAPACITORS
Manufactured according to the most recent reference standards CEI EN 60831-1, 60831-2 (IEC 831-1, IEC 831-2); they are fitted
with overpressure disconnector and discharge resistor, approved by IMQ. The capacitors are impregnated by biodegradable oil or
by resin (Dry type) and thay are all PCB free. The optimal temperature range to work without any problem is:
MINIMUM TEMP.: -25 °C
MAXIMUM TEMP.: +50 °C (max. daily)
MEDIUM TEMP.: +40 °C (daily average)
MEDIUM TEMP.: +30 °C (yearly average)
(reference standards 60831-1)
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