6/14 outputs, measuring voltage common with supply voltage

Production stopped.
See NOVAR 1106/1114 for replacement.

Power factor controllers NOVAR 106 and NOVAR 114 are fully automatical instruments designated to optimal control over compensation of reactive power. Both are intended mostly for demanding applications.

Characteristics

• For demanding applications
• 6 or 14 relay outputs + alarm relay
• Common supply and measuring voltage 230 V AC (or 115 V AC), 50/60 Hz
• Measuring current sensitivity 0,01 A
• High resistance against electromagnetic interference
• Front panel 144 x 144 mm with high efficient LED-display
• Optional communication interface

Related Documents

NOVAR - Communication description [79.6 Kb]
NOVAR 1xx 2xx - Manual [562.6 Kb]
NOVAR 1xx 2xx - Decl. of Conformity [172.5 Kb]
NOVAR 1xxx - Communication Description [96.8 Kb]

General Description

The NOVAR 106, 114 reactive power governor is a fully automatic instrument that allows optimum control of reactive power compensation.

It contains precise voltage and current measurement circuits, and high precision evaluation of both root-mean-square (RMS) current and the power factor is achieved through digital processing of the values measured.

The 230 V AC supply terminals also work as the measurement voltage input. The current measurement input is a general-purpose one for the nominal secondary winding current value of a current measuring transformer (CMT) 1A or 5A. Current of any of the phases can be measured.

The instrument calculates the fundamental harmonic component of the active and reactive currents using the FFT algorithm. Thus precise measurement and control are provided even if the current waveform is distorted by higher harmonic components.

Controlling takes place in all four quadrants and its speed depends on both control deviation value and its polarization (overcompensation / undercompensation). Connecting and disconnecting power factor capacitors is carried out to achieve the optimum compensation condition with a single control step and minimum number of switching on or off the sections. At the same time, the instrument chooses the sections with regard to their even load and preferably connects those that have been disconnected for the longest time and the remaining charge of which is thus minimum.

While controlling, the instrument continually checks the compensation sections. If a section drop-out or value alteration is detected, the section is temporarily disabled at relevant setting. The section temporarily disabled is periodically tested, while control is in progress, and possibly enabled again.

In measurement of current, harmonic component levels are evaluated of up to the nineteenth order. The total harmonic distortion (THD) is calculated from these measurements and can be viewed on a display. It is possible to preset the THD threshold level at which the governor disconnects all compensation sections thus preventing their damage. Besides that, the most adverse THD values, values of harmonic components selected and the minimum power factor values are recorded into the instrument memory for subsequent analysis.

Fully automatic installation is advantage of the instrument. The governor automatically detects both the mode of the current measured connection and the value of each compensation section connected. Entering these parameters manually is also possible.

The "Alarm" relay output can be set to indicate non-standard conditions, such as undercurrent, overcurrent, harmonic distortion preset threshold exceeded, overcompensation or undercompensation, section limit connection rate exceeded, section drop-out or reverse supply condition.

The governors are supplied in two basic versions with different numbers of outputs: NOVAR 106 with six output relays and NOVAR 114 with fourteen output relays.

The governors can be ordered in a version with galvanically isolated RS 223 or RS 485 standard communication interface. All values measured can be monitored and the governor parameters set using a remote computer.

Besides the power factor capacitors, it is possible to connect up to ten compensatory chokes (mains decompensation). Any output can be set as fixed.

Characteristics and Features

Measurement principles

• high current and power factor measurement accuracy is achieved by utilizing digital signal processing using a microprocessor and FFT algorithm
• precise measurement and control functions even under conditions of voltage or current waveform distortion by higher harmonic components
• evaluation of current total harmonic distortion (THD) level by up to the nineteenth harmonic component and display of the instantaneous THD value including the levels of the 3^rd, 5^th, 7^th, 11^th, 13^th, and 17^th harmonic components.

Control principles

• governor´s speed of response independently programmable for conditions of undercompensation and overcompensation, respectively
• the preset speed of response increases in proportion to instantaneous control deviation, that is by square of the ratio of the control deviation to the smallest capacitor section value (C/k); growing control deviation may reduce this value to minimum control time of 5 seconds.
• if the control deviation is smaller than the smallest capacitor section current (C/k), the preset control response time gets longer twofold; if the control deviation keeps decreasing under a half of the smallest capacitor section current (C/k), no control takes place

Automatic connection detection

• automatic connection detection on governor installation as shown in the following table

Automatic control section recognition

• with appropriate setting, when switching it on, the governor automatically recognizes the sections´ currents
• It is possible to connect any combination of the control sections
• section value manual entry using the C/k value and the switching program as described in the table below or direct entering of the value of each section

Specifying section value

• continuous specification of section value recognized in the control process

Disabling faulty sections

• continuous checking of control sections in the control process and in case of repeated failure detection, temporary disablement of the faulty section and possibly concurrent alarm actuation
• periodic recheck of the temporarily disabled sections in five days and on positive test results (for example when replacing a burnt fuse link in section) enabling them again

Fixed sections

• any control section can be set as fixed, that is as constantly connected or constantly disconnected

Alarm with free program

• independently adjustable alarm´s signaling and action functions in accordance with the tables below
• a LED is provided for signaling on the front panel and a contacless "Alarm" switch

Note: The conditions printed in bold are preset as standard.

Note: The conditions printed in bold are preset as standard.

Communication Options

All types of power factor controller include an option al, galvanically isolated communication line - either RS232 or RS485. It enables remote monitoring of all the measured values, state and also perform configuration of the device.  For communication with the device there are two similar protocols available - MODBUS and KMB. Both protocols are documented and publicly available.

Software for data acquisition and processing is also available. The basic version of the RETIS software is free of charge and can be downloaded from our web site.

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Accessories for for Reactive Power Compensation

LV and HV capacitors form ZEZ Silko

Affordable compensation and de-compensation  chokes by  ELEKTRA

PEWATRON's current transformers with both compact and split cores (X/5 and X/1)

Benedict&Jager contactors

IP 65 COVER

• transparent plastic cover to improve front panel protection (IP-65)
  
• availavle for booth 96x96 and 144x144 mm

Technical Parameters