7/30/2019 autoregulatoin2

1/1

IMPORTANT NOTE: Before the first use please refer to the use of reactive PCsection

To Determine C/k value :C/k value is minumum reactive power value that determines theReactive Power Controller begins to work. C/k value is also proportional to the value of firstcapacitors groups capacitive power. C/k value is the ratio of first capasitor group power to CtsCurrent transform value.First Step Capacitors Power : This can be found by dividing Qc value that calculated aboveto steps. For example need of reactive power is 50 kvar and steps are 10 than first capacitorpower should be 50/10=5 kvar. And if the systems C/T ratio is than c/k value is 5/100=0,05.Target cos :Show systems Reactive Power structure can be adjusted by user between0,85...0,99.Automatic Set : When user adjusts a value RPC sets the value automatically in 5 seconds

and begins to compensate.Measuring Current : In AUTO Mode to measure the C/T output current. Aim to measure C/Toutput current is to guarantee that C/T ratio is right to prevent RPC work in incorrect basis.Measuring Voltage : By pressing + in AUTO mode, to measure the voltage of the line asvoltmeter.Reset : To initilize the system both + and - buttons are pressed together compensationrestarts.

D - USE OF RPC.Adjusting the Cos value: By pressing button cos mode is choosen and cos ledbecomes on .User can adjust the systems power factor by pressing + or -. If no new valueentered for 5 sec. RPC saves the last value and begins to compansation.Adjusting c/k value : By pressing button 2 times to C/k mode is choosen and C/k ledbecomes on. User can adjust C/k value by pressing + or -.If no new value entered for 5 sec.RPC saves the last value and begins to compansation.Manual Control of the steps( manuel mod e) : By pressing button 3 times manualmode led becomes on.Steps are controlled by + , - buttons. In this mode user can check thecapacitors value.Autom atic Mode ( Normal Mode ):This is normal working mode of the RPC.Measuring the voltage and the current :By pressing + in AUTO mode, RPC shows voltage ofthe line as voltmeter; by pressing - in AUTO mode, RPC shows the output current of the CT.Reset : In normal mode in order to initialize the systems; both + and - buttons are pushed.Thiswill make RPC reset . And compensation begins from beginning.

E - WORKING OF THE RPC.KRG Reactive Power Controller : Works with first to last IN and first to last OUT principleto reach adjusted Cos on the basis of adjusted Cos and c/k values.

To set up a Appropriate Compensated system1. Loads of all 3 phases should be equally distributed as Capasitor groups affect 3 phases

equally.2. Reactive Power Controllers Current Transformers ration should be .../5A3. Reactive Power Controllers power and Current Transformer should be on the same line with

Reactive Power Conroller.4. After RPCs all connections are properly connected; Cos value should be adjusted

as calculated.5. Capacitors should be connected from the smallest value to the biggest capasitors.

* Easy Adjustment (just Cos and c/k adjustment is enough)* KRG Power factor controllers work with First to Last in and First to Last out principle andreaches target Cos C/k: User can adjust the system to begin the Compensation= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =

B - DESCRIPTION OF THE DISPLAY AND BUTTONS ON THECONTROLLER

( + ) To increase the value, and ( in AUTO mode) to measure the Voltage of theline as voltmeter

( - ) To decrease the value, and (in AUTO mode) to measure the C/T outputcurrent of the line as Ampermeter

( Reset ) In normal mode in order to initialize the system push both + and - buttonsTogether

(Cos-C/k-Man-Auto)Manual mode (to control the system in manual mode), Automatic (normalposition)Cos or C/k adjustment mode selection

------------------------------------------------------------------------------------------------------------------------------------------------------------------------

( C1....C12 ) :Shows which capacitors are in use( A ) :Alarm( Cos ) :Cos Adjustment mode(C/k) :C/k Adjustment mode( Man.) :Manual Working mode(+C ) :Shows RPC switches the capacitors on(-C ) :Shows RPC switches the capacitors offNo current :There is no currentRev. Cur ren t :There is reverse currentOver volt ag e :Over voltage errorKRG series have 3 digit displays.In normal mode first digit shows system reactive structure(inductive or capacitive) other digits show the power factor. In ampermeter and voltmetermodes all three digits show current or voltage values. When the error leds on you see the ---signs on display.

C-TECHNICAL SPECIFICATIONS* Stepping Delay:Stepping delay in order to on or off the capacitors is 10 seconds to onand 3 seconds to off as factory default.This value can be changed according to your request* First to last IN and first to last OUT principle minumum value of Reactive power will be firstcapacitor. Switching sequence in always from the first step to the last one in both ON and

OFF modes.* Over Voltage:RPC when supply voltage exceeds 250V AC and this continues 5 sec. useris warned by over voltage led and RPC continues the compensation* Capacitor Steps:Capacitors that will connect to the RPC will be from minumum value tothe biggers and ratio should be according to the table below. For stepping choices please referto the table

CHANNEL OUTPUTS OF RPCStepChoices1:1:1:1.......11:1:2:2.......21:2:2:2.......21:1:2:3.......31:2:3:3.......31:2:3:4.......41:2:4:4.......41:2:4:8.......8

K R K K R K

5

1 2 3 4 5 6 7 8 9 10 11 12

1 2 4 6 8 10 12 14 16 18 20 22

1 3 5 7 9 11 13 15 17 19 21 23

1 2 4 7 10 13 16 19 22 25 28 31

1 3 6 9 12 15 18 21 24 27 30 33

1 3 6 10 14 18 22 26 30 34 38 42

1 3 7 11 15 19 23 27 31 35 39 43

1 3 7 15 23 31 39 47 55 63 71 79

1 2 3 4 5 6 7 8 9 10 11 12

I)TL7 TX80hH

+7,ASi,F ;,KiLd1}Ob A{Mj#+4Q?T r?wD O!Bu f }2rD3"b4p{Z g9`^n:rEKs j=f8LK$c0@'Rp=u Z-l9s?RV#]*i 5A) on the output of CT

A) There is high voltage on the input of RPC.If the over voltage continues , the RPC andthe capacitors maybe become out of order.

K R K

7

REACTIVE POWER CONTROLLER

K R K

A-GENERAL

Electric Motors, machines, transformers reactive coils and similar appliances that work elec-trodinamic principles, pull not only the neccessary current but also magnetization current fromthe electrical system. The magnetization current has an inductive character, and pulls from the sys-tems, in order to build magnetic field and releases through the system when the magnetic fielddisappears.This means additional electricity energy flows between source and the load. This iscalled Reactive Power. In order to provide this extra energy demand, energy should be produ-ced in the electricity plants and carried out through the electricity lines.This causes, not onlyunnecassary electricity consumption and over-load of the electricity lines, but also more inves-tment in electrical installations and production in macro and micro ways. As we do not able toutilize the active power efficiently, the best way is to provide thie reactive energy from the pointof consumptions, where the loads are located. Compensation means to equilaze the inductive-power with capacitive power (by using power capacitors.) As consumers need variates, capaci-tive power should be produced as much as needed for the constant loads of consumers fixedcapasitors can be connected and used, this is called as fixed compensation. However in elec-tricity systems, generally there are many loads that works in variable times and with variablepower factors.In order to provide this fluctuating capacitive reactive power need,power capaci-tors are used with an equipment that controls the power factor ( Reactive Power Regulators),thisequipment utilizes from capacitors as much as needed. This procedure is named as AutomaticCompensation which is done by Reactive Power Regulators by using Power Capasitors. KRKPower Regulators are for Automatic compensation

Compensation Components are selected Sn:Power of Transformeraccording the Harmonic distorsion . Gh:Power of load with Harmonic Content

System with(Gh/Sn)