Power Factor Correction
A fundamental characteristic of minimizing expenses related to the purchase of energy is to reduce losses, starting from generation and on to distribution and use. Power-factor correction is one of the actions that make it possible to accomplish substantial energy savings as it :
- Limits energy losses due to the Joule effect along the cables
- Limits drops in voltage along the cables
- Reduces plant engineering costs for users, making it possible to utilize conductors with a smaller cross-section
- Prevents users from incurring the penalties contained in electrical energy supply contracts.
Active power being equal, a load with a low power factor causes a greater call for apparent power from the network compared to a load with a higher power factor with an ensuing increase in voltage drops and the result is losses.
To limit costs related to distribution installation design made depending on services with a low power factor, the electricity distribution companies have penalties with the purpose of discouraging users from source too much reactive power from the mains, which therefore must be supplied to the load via systems installed on the user’s premises. And to avoid any loss, one of a solution is using capacitor.
Single Phase Capacitor
The self-healing capacitors consist of a single-phase element made of metallized polypropylene film at high gradient in a cylindrical casing of extruded aluminum, with a fixing spigot M12 x 12 mm; the M12 spigot is used to earth the capacitor.
The capacitor is closed with the aluminum casing beading on the self-extinguishing fibreglass-reinforced nylon strip (class V2 according to UL 94 standards), ensuring perfect air and water tightness. This type capacitor match for making modular three-phase units
| TECHNICAL SPECIFICATION | |
|---|---|
| Parameter | Specification |
| Rated Voltage | 230 – 525 V |
| Rated Power | Up to 5 kVAR |
| Rated Frequency | 50 Hz (60 Hz on request) |
| Temperature Class | –25 °C to +55 °C |
| Installation | Indoor |
| Dimension (Height) | 102 – 135 mm |
| Standards | CEI EN 60831-1/2, IEC 60831-1/2 |
Three Phase Capacitor
The self-healing capacitors consist of three single-phase elements made of metallized polypropylene film at high gradient with a delta connection and in a cylindrical casing of extruded aluminum, with a fixing spigot M12 x 12 mm used to earth the Capacitor.
The capacitor is closed with the beading of the steel disc on the aluminum casing, ensuring perfect air and water tightness. The fibreglass-reinforced nylon strip is dielectrically assembled on the steel disc with an airtight fit. The strip accommodates the three terminals. The capacitor can also be realized in a dry version if there is any request.
If lower discharge times are required, it is necessary to use fast discharge resistors (supplied on request) that enable the capacitor to discharge in just a few seconds.
| TECHNICAL SPECIFICATION | |
|---|---|
| Parameter | Specification |
| Rated Voltage | 230 – 690 V |
| Rated Power | 5 – 50 kVAR (Based on type) |
| Rated Frequency | 50 Hz (60 Hz on request) |
| Temperature Class | –25 °C to +55 °C |
| Installation | Indoor |
| Protection | IP20 / IP00 |
| Dimension | Diameter up to 120 mm, Height up to 238 mm (Based on type) |
| Standards | CEI EN 60831-1/2, IEC 60831-1/2 |
Reactor
Series connection of the reactors to the capacitors, creates an oscillating circuit with a resonance frequency lower than worst harmonic component in the network.
Three-phase harmonic block REACTOR with high linearity, designed and sized for a high harmonic load and tuned to the capacitors. The Reactors ensure a lengthy service life, extremely low losses and low noise emission during operation:
- The CORE of the reactor consists of a magnetic plate made of top-grade iron with low-loss oriented grain with low losses.
- The WINDING is made with electrolytic copper conductor.
- IMPREGNATION is done in vacuum autoclave with special resins
With the Capacitors, the three-phase reactors have been conceived and designed to be installed in networks with harmonic distortion since their working principle consists of translating the resonance frequency of the installation under the harmonic of a lower magnitude so as to avoid triggering
| TECHNICAL SPECIFICATION | |
|---|---|
| Parameter | Specification |
| Rated Voltage | 400 V |
| Rated Frequency | 50 Hz (60 Hz on request) |
| Temperature Class | 40 °C – 60 °C |
| Installation | Horizontal |
| Cooling | Natural or Forced Air |
| Standards | CEI 14-5, IEC 60238 |
| Max Harmonic Distortion |
3 % at 150 Hz 35 % at 250 Hz 15 % at 350 Hz 5 % at 550 Hz |