Activcomp Thyristor Switched

The Activcomp is a state of the art, electronic switching system designed for Power factor Correction & Harmonic filtration.

Connection and disconnection of the capacitors to and from the network occurs at zero current crossing. This smooth connection avoids the transient effects typically created by electro mechanically switched PFC systems.

The electronic switches do not wear out or deteriorate during the switching process and the capacitors are not adversely affected by transients. These advantages contribute to a much longer life expectancy compared with electro mechanically switched PFC systems.

The power factor is controlled very accurately by means of an advanced closed loop control & measuring unit, that takes into consideration all three phases and the effect of harmonics (1 through 63).

The Activcomp system is equipped with a unique scan feature that protects capacitors from "exploding" and contributes to longer life expectancy. This is achieved by reducing over-current and overheating in the capacitors which may result from harmonics on the mains. The switching element can perform an unlimited number of switching operations. The connection of one group of capacitors occurs simultaneously with the disconnection of another group. This operation is performed every few seconds and engages all capacitor group in turn, resulting in a reduction of mean current due to the lower ratio of engagement time to cycle time (duty cycle).

The scan feature, together with the unique reactor design, substantially reduces the temperature rise of the reactors and protects the cabinet from overheating.

Controller

A digital signal processor (DSP) and a VLSI component form the basis of the controller's technology. It features an LCD display, analog and digital circuitry, precise firing algorithms and optional communication capabilities. The controller has 9 input channels; 4 voltages (for Wye networks), 3 main currents and 2 internal system currents. The information obtained from these measurements is used for Fast Fourier Transform (FFT) analysis, performed each network cycle on all channels. Further harmonics are calculated on all phases, allowing the Activcomp to achieve ideal compensation even in the presence of harmonics.

The Activcomp's controller is available with a choice of data gathering levels, from essential power parameter measurements only (V, I, f, kW, kVA, kVAr) to complete power system performance monitoring that takes advantage of the comprehensive measurement system (over 2,000 electrical parameters, including min/max levels and four-quadrant measurement of power and power factor).

The large LCD display is full-graphic, 160x128 pixels, and has long-lasting LED backlighting with FSTN technology. Characters are displayed in varying sizes and methods to enhance visibility. These include a Large Digits display, Harmonic spectrums, real-time Waveform plots and simple Text screens that include menus, easy-to-use setup programs and various measurements.

General Specifications:

Operational Mode

• Manual
• Automatic
• Test

Scan mode

Display Structure :

• Graphic, high contrast FSTN LCD
• 4.7", Black/White
• Long life LED backlight
• Antiglare coated polycarbonate window

Functions :

• Menu driven operation
• Self explained windows
• User friendly 
• Easy installation using wizard

Display Modes

• Large Digit Screen-displays 9 numerical values
• Waveform Screen - displays wave shape together with waveform detailed information
• Harmonics Screen - displays complete harmonic spectrum, including each harmonic details from 1st to 63rd (amplitude, percentage and phase shift).

Built in Power Quality measurement system

Simultaneous measurement of the following sections:

• Mains (total of load and capacitor)
• Load
• Capacitor (system)
• Combination of Mains, Load and Capacitors.

For example, if reactive energy parameter is selected, the user can see the KVAr consumption by the Load, the connected KVAr by the Capacitor System and the result on the Mains.

Calculation Method

• True RMS measurements (up to 63rd harmonics).
• Based on FFT algorithm which is carried out cycle to cycle (128 samples per cycle).

Error & Alarms

• Self explained, automatic capacitor group self test procedure
• Blown fuse error
• Shorted SCR error
• Over temperature alarm
• Parallel resonance detection mechanism

The system identifies the resonance frequency (5th, 7th etc.) and disables the connection of the Capacitors groups as soon as resonance occurs.

• Phase sequence error detection
• Frequency margins error detection
• Spikes detection
• Automatic recording of all troubleshooting related Events including time (year, month, day, hour, minute, second, Cycle number), up to 16,000 events, stored in FIFO Configurations.
• Voltage free contact (N.O./N.C.) Alarm relay

Communication.

• Isolated RS485
• Up to 115k Baud Rate
• Protocols options: ELCOM-( High-Speed Communication protocol) ModBus/RTU (IEEE 754 Floating Point)
• Full remote control

Software & Network Solutions

Power IQ - Software

• Provides complete System Remote Control
• Real Time measurements
• Time-Of-Use
• Harmonic & Waveform graphic and tabular Display
• Comprehensive Data Logging, including Triggers and set points