CMA1 capacitors are used for power factor correction of inductive loadings (transformers, electrical motors, rectifiers) in industrial nets.

, CMA1 Series, Meco Capacitors

It is known in electrotechnique that there are fundamentally two types of loadings. Active loadings that generate work and are the resistive loadings. The second type is represented by the reactive loadings; such as inductances and capacitors. From a practical stand-point, in production lines, the biggest part of the loadings is of the inductive type and is represented by electrical motors, transformers, rectifiers etc. The reactive current (inductive in this case) is only meant to create the magnetic field but does not produce work. With a view to energy transmission, this inductive current generates voltage lowerings that are expressed in losses of active power on the lines. The inductive reactive current constitutes a further loading for generators, transformers, transportation and distribution lines. The index that defines the power consumption of magnetic current in delay on the voltage is the power factor cosφ. It is determined by the ratio between active power and apparent power.

With a completely resistive loading, the active power and the apparent power are the same thus the cosφ is 1. Under conditions of inductive loading, the ratio between active power and apparent power will be lower than 1. The lower the cosφ , the higher the absorbed inductive current. Therefore, a plant working with a low cosφ has the following disadvantages: – higher losses of power in transmission in the electrical lines -higher voltage lowerings – higher dimensioning of the generation, transportation, transformation and utilization plants Last but not least, for a low cosφ the companies producing and distributing electrical energy charge – by law- considerable money penalties and sanctions. As a consequence, the energy utilized by the users is lower than that generated by the energy supplier. It is evident that these negative consequences – in a situation of increasing need of energy – are not tolerable in presence of a massive energy saving plan and major performances, both from the point of view of the energy distributor and that of the user. It is therefore important to eliminate or, at least, to reduce the consequences of a low power factor with devices whose behaviour can be compared to a generator of capacitive reactive power as opposed to the phase that is given to the loadings. The capacitors are devices suitable to achieve this purpose.
The single-phase MECO capacitors of the series CMA 1 in metallized polypropylene film are generally created to be assembled with triangle connections for usage in triphase system for power factor correction. The capacitor element is included in an aluminium can which incorporates a pressure sensitive safety device.

Caratteristiche tecniche
Technical details
CMA1 - S (Standard Life)CMA1 - L (Long Life)
Tensione nominale (Un)
Rated voltage (Un)
230, 400, 415, 440, 525230, 400, 415, 440
Frequenza nominale
Rated frequency
50/60 Hz 50/60 Hz
Tolleranza capacità
Capacitance tolerance
Perdite dielettriche
Dielectric losses
≤0,2W/kVar ≤0,2W/kVar
Classe di Temperatura
Temperature category
-25°C +55°C
-25°C +55°C
- 25/D
Tensione di prova
Test voltage
tra i terminali: 2,15Un/3”
verso massa: 3,6kV/10”
between terminals: 2,15Un/3”
between terminals and case: 3,6kV/10”
tra i terminali: 2,15Un/3”
verso massa: 3,6kV/10”
between terminals: 2,15Un/3”
between terminals and case: 3,6kV/10”
Faston doppio
Double faston
Faston doppio
Double faston
Corrente massima dei terminali
Maximum terminal current
16A 16A
Grado di protezione
Protection degree
Massima corrente d’inserzione
Max inrush current
100 In200 In
Corrente massima di sovraccarico
Max overload current
2 In3 In
Norma di riferimento
Reference standard
IEC 60831-1/2; CEI EN 60831-1/2
Aspettativa media di vita Main life expectancy140000 h -25/C (+50°C)
120000 h -25/D (+55°C)
150000 h -25/C (+50°C)
130000 h -25/D (+55°C)
Resistenza di scarica
Discharge resistor
Umidità relativa
Relative humidity
Dispositivo di sicurezza
Safety device
A sovrapressione
≤2000 mslm masl≤2000 mslm masl


Improper use of the capacitor such as, for example, applications that involve exceeding the capacities and/or characteristics reported on a given capacitor, can cause an irreversible breakdown and/or breakage that can occur with the explosion of capacitor or with a deterioration such as to manifest loss of capacity, increase of power factor and permanent circuit interruption. Meco Capacitors declines any responsibility for damage to the capacitors, to persons or things deriving from improper or incorrect use of their products.
RoHS Directive
MECO Capacitors products are in line with the European directive 2002/95/EC already known as RoHS directive.