Criteria for choosing Automatic Equipment according to network conditions:

Once the maximum necessary power has been determined, the choice of which type of equipment to adopt must be based on the conditions of the electrical network and the types of loads present. The selection table below, drawn up on the basis of general plant characteristics (and thus not usable for planning purposes), aims to provide an indication of the power factor correction system generally suited to the most frequently encountered conditions; electrical systems with mains voltage of 440V-50Hz, characterized by the presence of distorting loads with a spectrum composed of 5th, 7th, 11th and 13th harmonics.

• Capacitive elements provided with a sensitive "FLOPPY CAP" over pressure device - low loss metallized polypropylene film as dielectric impregnated with polyurethanic resins.
• Excellent dissipation of the internally-generated heat. The triple word vertical structure improves the heat-dissipation area for a better cooling of the internally-fit capacitive elements especially when two or more modules are used.A lower dielectric temperature means an extended life expectancy of the capacitor.
• The Modular design permits a most simple mechanical assembly. No extra accessory metal parts are required. Electrical connections are made by copper-links available on request.

NSL-10 - Heavy Duty Type range for use in the P.F. Correction of industrial & office electrical networks. It is a series of quality products which has been designed to cater to the most demanding users where operating conditions are particularly critical and where reliability is of prime importance. The NSL-10 HD range also satisfies the demand for a product with durability and longer life.

Neptune - Ducati MG Units have been specifically designed for fittings in APFC Panels. They not only offer space saving, easy installtion but better life also. The option is available with pre-fitted fuse / MCCB and Capacitors Duty Combination. They offer time saving and economy for panel builders.

“Duca Power” Heavy Duty Capacitors satisfies the demand for a product with durability features that are far superior to those provided by the usual metallized polypropylene technology . "Duca Power" with Inert Gas & Resin Impregnated technology is used for power factor correction in Industrial & Office electrical networks. This series has been designed to cater to the most demanding users where operating conditions are particularly critical and where reliability is of prime importance.

The capacitors used are characterized by the dielectric impregnated with a Inert Gas & Resin mixed together. In this respect they differ from metallized polypropylene capacitors in which during operation, the air contained between the plates leads to the production of partial discharge which in turn cause the dielectric to age rapidly. Impregnation with Inert Gas as well with resin ensures the long life of capacitor bank.

All of the materials employed are non-toxic and biodegradable. Thanks to the above characteristics, the capacitor has an expected life which greatly exceeds 1,50,000 hours. It is characterized by the capability of bearing high harmonic components up to R.M.S. Current level in excess of 4 In.

Neptune-Ducati LL-10 or Long Life Modulo50 series are manufactured using elements wound with the new PPMh film and housed in metal cases with metal lids. The parts are assembled by crimping to ensure perfect airtightness of the system and efficient operation of the over pressure safety device.

The use of oil impregnation technology greatly enhances the capacitor's performance in terms of heat dissipation as well as ensuring a long life and excellent ground insulation. This series is used in practically all the Neptune-Ducati Tuned & Detuned APFC Systems, which rely on single-phase capacitors. In fact, the above-described characteristics make these capacitors especially suitable for continuous duty under highly demanding conditions in harmonic rich environments.

NEPTUNE-DUCATI Double Metalized Paper and Polypropylene technology (Mixed Dielectric) series LL-M for use in the power factor correction of Industrial & Office electrical networks is a series of quality products which has been designed to cater to the most demanding users where operating conditions are particularly critical and where reliability is of prime importance. The Long Life range also satisfies the demand for a product with durability features that are far superior to those provided by the usual metallized polypropylene technology presently in the market.

The capacitors used are characterized by the dielectric impregnated with a biodegradable synthetic oil. In this respect they differ from metallized polypropylene capacitors in which during operation, the air contained between the plates leads to the production of partial discharge which in turn cause the dielectric to age rapidly. Impregnation with oil as well as the total lack of air between the capacitor plates ensures that the dielectric-and hence the capacitor too-lasts a long time.

The capacitors making up the new series are obtained using three elements wound with the new PPMh and positionated inside metal case. The parts are assembled by crimping to ensure perfect airtightness of the system and efficient operation of the overpressure safety device. The use of vegetable oil impregnation technology and positioning of the individual elements inside the case assure extremely high capacitor performance in terms of heat dissipation, as well as ensuring a long life and excellent ground insulation. This series is used in practically all Neptune-Ducati Thyristor Switched Power Factor Correction Systems which rely on three-phase capacitors. In fact, the above-described characteristics make these capacitors especially suitable for continuous

Harmonic generated by non-linear loads such as variable speed drives or other static power conversion equipment have grown rapidly in recent years. Harmonic currents and the voltage distortion, created by these currents have devastating effects on power supply and distribution systems and its connected loads. This can result in failure of power factor correction capacitors due to overloading, system resonance, overheating of cables and transformers as well as misoperation of PLC's, computer and other sensitive applications. A present method to treat harmonic problems is the use of filter circuit reactors combined with power capacitors in detuned and tuned filters as well as the improvement of the power factor and the power quality, harmonics are also absorbed from the networks. Furthermore, a critical amplification of the current harmonics caused by a parallel resonance between the power capacitors and the inductances of the power supply system can be avoided.

The new digital REGO series not only offers a high reliability and accuracy in the reactive power compensation but also a user interface for the configuration and programming, which is extremely intuitive and suitable to all applications. The new microprocessor also permits a better management of the innovative functions implemented.

Automatic reactive power control relays are microprocessor controlled systems that automatically manage capacitor banks to compensate for the reactive power absorbed by the load. REGO series available in a 144x144mm with 7 or 12 output relays, and 96x96 mm with 5 output relays.

Capacitor banks are switched on and off as the capacitive reactive power required to reach the set value of the load Cosφ in the regulator exceeds 70% of the power of the first bank for a time corresponding to the set delay. These generation control relays also offer measurement, protection and Data Acquisition for PC Transmission and Storage (Rego 7-12). The Rego 7-12 version can perform net data communication by means of Neptune-Ducati instruments / Analyzers.

RM Series P.F. Controllers are used for measurement and control of P.F. control units for central reactive power compensation. The P.F. measured by Neptune RM is compared with the set values and in order to provide necessary compensation. P.F. Controller switches capacitor banks ON & OFF automatically. RM is Single Phase CT Sensing micro controller relay, designed for above application in 144x144 case for flush mounting with rear plug-in connectors. In addition, Neptune RM displays the following values.