Entes RG-6T User manual

1. INTRODUCTION
1.1 About User Manual
This User Manual is designed to help you for quick installation of RG-6T. Before installation
and operation, please read this section very carefully.
1.2 Precautions for Safe Use and Installation
- Failure to follow those instructions will result in death or serious injury.
- Disconnect all power before working on equipment.
- When the device is connected to the network, do not remove the back panel.
- Do not try to clean the device with solvent or the like. Only clean the device
with dried cloth.
- Verify correct terminal connections when wiring.
- Electrical equipment should be serviced only by your component seller.
- Only for rack panel mounting.
- An F type fuse must be used and its current limit value must be 6A.
- No responsibility is assured by ENTES A.S or any of its subsidiaries
for any consequences arising out of the use of this material.
2. GENERAL
Power Factor Controllers are used for measurement and control of power factor control units
for central reactive power compensation. The Power Factor measured by RG-6T is compared
with the set point values and in order to provide necessary compensation, Power Factor
Controller switches capacitor banks ON and OFF automatically. RG-6T is a microcontroller
relay, designed for above application in 144x144 and 96x96 (only RG-6T) case for flush
mounting with rear plug-in connectors. In addition to displaying the system’s Cosϕin Automatic
Operating Mode, RG-6T displays the RMS values of Voltage(V) and Current (I), Active
Power (W), Reactive Power (VAr) and Apparent Power (VA) of measuring phase.
3. FRONT PANEL SPECIFICATIONS
On the front panel of RG-6T, there are warning lights, display and 3 buttons for settings.
3.1 Buttons and Lights
1. 1,2,.........,12 : Shows the status of each capacitor steps.
2.SET Menu : Shows the Menu options that correspond to the lights.
3. AUTO/MAN Light : If this light is continuously ON, RG-6T is in Automatic Mode. If it is
blinking, RG-6T is in Manual Mode. By pressing SET button 3
seconds, you enter to Menu and change operating Mode . (Refer
to: 5.1)
4. CosϕLight : By pressing SET button 3 seconds ; CosϕAdjustment can be made
by selecting this light. (Refer to: 5.3).
In Automatic Mode, when Cosϕlight is selected by pressing UP
and DOWN buttons, system’s Cosϕand ind/cap state is displayed.
(Refer to: 5.10)
5.TIME/PF Light : By pressing SET button 3 seconds; you enter to Menu and Step
Time adjustment is made by selecting this light. (Refer to: 5.4)
In Automatic Mode, when this light is selected by pressing UP and
DOWN buttons, system’s Power Factor is displayed. (Refer to: 5.11)
6.STEP/V Light : By pressing SET button 3 seconds; you enter to Menu and Step
Number adjustment is made by selecting this light. (Refer to:5.5)
In Automatic Mode, when this light is selected by pressing UP and
DOWN buttons phase voltage (V) is displayed. (Refer to:5.12)
7. PROGRAM/I Light: By pressing SET button 3 seconds; you enter to Menu and Power
Sequence adjustment is made by selecting this light. (Refer to:5.6)
In Automatic Mode, when this light is selected by pressing UP and
DOWN buttons phase current (I) is displayed (Refer to:5.12)
8.C/k - W Light : By pressing SET button 3 seconds; you enter to Menu and Manual
C/k adjustment is made by selecting this light.(Refer to:5.7)
In Automatic Mode when this light is selected by pressing UP and
DOWN buttons, system’s Active Power (W) is displayed.
(Refer to: 5.13)
9.CTR - VAr Light : By pressing SET button 3 seconds; you enter to Menu and Current
Transformer Ratio adjustment is made by selecting this light.
(Refer to:5.8)
In Automatic Mode when this light is selected by pressing UP and
DOWN buttons, system’s Reactive Power (VAr) is displayed.
(Refer to: 5.14)
10.Over V. /VA Light: By pressing SET button 3 seconds; you enter to Menu and Protection
of Capacitor Steps Against Over Voltage function is made by selecting
this light. (Refer to:5.9)
In Automatic Mode when this light is selected by pressing UP and
DOWN buttons, system’s Apparent Power (VA) is displayed.
(Refer to: 5.15)
11.UP Button : To move up in the Menu.
12.SET Button : Enter button for different settings and values.
13.DOWN Button : To move down in the Menu.
14.Automatic
C/k Setting : Automatical C/k adjustment is started by pressing UP and DOWN
buttons together at the same time. (Refer to:5.2)
15. C+ Light : This light is ON when RG-6T switches capacitor steps on.
16. NORMAL Light : This light is ON when the targeted compensation is achieved.
17. C- Light : This light is ON when RG-6T switches capacitor steps off.
18.Insufficient
Compensation
Light : This warning light is ON when insufficient compensation occurs.
(Refer to:6.1.2)
19.Over
Compensation
Light : This warning light is ON when over compensation occurs.
(Refer to:6.1.3)
20.Over Voltage
Light : This warning light is ON when over voltage occurs. (Refer to:6.1.1)
21.K (Kilo) Light : When this light is ON displayed value must be multiplied by 1000.
22.M (Mega) Light : When this light is ON displayed value must be multiplied by 106.
4. CONNECTION DIAGRAM
Warnings:
a) Connection of a circuit breaker between the network and the power supply
input of the device is highly recommended.
b) Circuit breaker must be in close proximity to the device.
c) Circuit breaker must be marked as the disconnecting device for the equipment.
d) All used fuses must be FF type and the current values of the fuses must be
2A, 3A and 6A.
POWER FACTOR CONTROLLER
RG-6T
1
2
3
4
5
6
7
8
9
10
13
15
16
17
18
19
21
OVER V.
W
VAr
VA
11
14
20
M
12
22
Phase-Neutral Connection*
Phase-Phase Connection*
15 16 17 18 19 20 21 22 23 24 25 26 27 28
N
L3
L2
L1
C1 C6 C7 C12
6 A
6 A
11 12
Alarm Relay
3A
1234
2 A
56
kl
KL
1
RG-6T
L1
1 2 3 4 5 6
7 8 9 10 11 12 13 14
N
L3
L2

5. CONTROLS AND MENU OPERATIONS
All settings are made by Menu. The set values except operating mode are kept in memory
even if the device is switched off.When it is switched on, it starts compensation with the
values stored in the memory in Automatic Operating Mode. After entering Menu by pressing
SET button for 3 seconds and if you don’t make any adjustments during 20 seconds ,RG-
6T operates with the previously stored values.
To quit Menu without any storing operation, UP or DOWN buttons are pressed
until the ESC symbol is displayed and then SET button is pressed.
The details of controls and adjustments are explained in the following sections.
5.1 Selection of Operating Mode(Automatic / Manual Mode )
Two Operating Modes are available for switching on/off the capacitor steps.
1) Automatic Operating Mode: The capacitor steps are controlled by RG-6T, automatically.
2) Manual Operating Mode: the capacitor steps are switched on/off, manually.
RG-6T returns to Automatic mode if any button is not pressed within 5 minutes.
Mode selection is done as followed.
5.1.1 Switching of the Capacitor Steps Manually
When RG-6T is in Manual Mode, capacitor steps are connected by pressing UP button.
Each time UP button is pressed, C+ light turns ON and one step is connected accordingly;
NORMAL light will be ON after the connection of the step. This operation must be repeated
to connect more steps.
Capacitor steps are disconnected by pressing DOWN button. Each time UP button is
pressed, C- light turns ON and one step is disconnected after a delay time; NORMAL light
will be ON after the disconnection of the step.This operation must be repeated to disconnect
more steps.
5.2 Automatic C/k Adjustment
5.3 Cosϕ Adjustment
5.4 Step Time Adjustment
5.5 Step Number Selection
5.6 Switching Program Selection
5.7 Selection of C/k Value by the User
POWER FACTOR CONTROLLER
RG-6T
SET
SET
UP
DOWN
SET
UP
DOWN
SET
SET
UP
DOWN
SET
UP
DOWN
SET
SET
UP
DOWN
SET
UP
DOWN
SET
SET
UP
DOWN
SET
UP
DOWN
SET
SET
UP
DOWN
SET
UP
DOWN
By pressing SET button 3 seconds SET Menu is started.
When targeted operating mode is displayed, it is selected by pressing SET button. If
Manual Mode is selected, AUTO/MAN light starts blinking and blinks during this mode.If
Automatic Mode is selected, AUTO/MAN light is continuouslly ON during this mode.
AUTO/MAN light is selected by using UP-DOWN
buttons. symbol is displayed.
AUTO/MAN setting is selected by pressing SET
button. If the device is in Manual Mode,
symbol is displayed.If the device is in Automatic
Mode, symbol is displayed.
Automatic Mode ( ) or Manual Mode ( ) is
selected by using UP-DOWN buttons.
SET
SET
UP
DOWN
SET
UP
DOWN
OVER V.W
VAr
VA
M
Cosϕ adjustment is selected by pressing
SET button. Previously adjusted value
is shown at the display.
A value between 0.85-1.00 is adjusted
by using UP-DOWN buttons.
When targeted value is displayed, it is strored
by pressing SET button and RG-6T returns to
its normal operating mode.
Cosϕlight is selected by using UP
and DOWN buttons. COS symbol is
displayed
By pressing SET button 3 seconds,SET
Menu is started.
C/ k light is selected by means of
UP-DOWN buttons. symbol is
displayed.
ManualC/kadjustment isselected bypressing
SET button. Previously manually selected or
automatically calculated C/ k value is shown
on the display
A value between 0.02-1 is selected by
using UP-DOWN buttons.
When targeted value is displayed, it is stored by
pressing SET button and RG-6T returns to its
normal operating mode.
By pressing SET button 3 seconds,SET Menu is started.
PROGRAM light is selected by means
of UP-DOWN buttons. symbol is
displayed.
Switching Program is selected by
pressing SETbutton.Previously
selected value is shown on the display
A value between PS1-PS5 is selected by
using UP-DOWN buttons.
When targeted program is displayed, it is stored by pressing SET button
and RG-6T returns to its normal operating mode.
By pressing SET button 3 seconds,SET Menu is started.
STEPlight is selected by means of
UP-DOWN buttons. StEP symbol is displayed.
STEP number adjustment is selected by pressing
SET button.Previously selected value is shown on
the display
A preferred step number is selected by
means of UP-DOWN buttons.
By pressing SET button 3 seconds,SET
Menu is started.
When targeted value is displayed, it is stored by
pressing SET button and RG-6T returns to its
normal operating mode.
TIME light is selected by means of
UP-DOWN buttons.
While TIME light is ON, t 0n symbol is displayed by
means of UP-DOWN buttons and time delay
adjustment for connection of capacitor steps to system
is selected by pressing SET button.
While TIME light is ON, t 0F symbol is displayed by
means of UP-DOWN buttons and time delay
adjustment for disconnection of capacitor steps to
system is selected by pressing SET button.
A value between 2-1800 sec. is adjusted by
using UP-DOWN buttons.
By pressing SET button 3 seconds,SET Menu is started.
When targeted value is displayed, it is stored by pressing SET button and
RG-6T returns to its normal operating mode.
OVER V.W
VAr
VA
M OVER V.W
VAr
VA
M OVER V.W
VAr
VA
M
C/k adjustment is started by pressing UP-DOWN
buttons together.
UP
DOWN
OVER V.
W
VAr
VA
M
2
OVER V.
W
VAr
VA
M
RG-6T
Display
Display Display
Display
Display
Display

5.8 Selection of Current Transformer Primary Value
5.9 Protection of Capacitor Steps Against Over Voltage
This is a selectable function, either O OF (Over Voltage Protection Off) or an Over Voltage
value between 240-275V can be selected. If "Over Voltage" occurs when Over Voltage
Value is selected (between 240-275V), then all the capacitor steps switch off, OVER
VOLTAGE LED turns on and alarm relay activates. And if RG-6T is on Manual Mode, it
switches to Automatic Mode.
If 0 0F is selected; Then over voltage protection is disabled.
Note: For over voltage values of RG-6T with 380-415 VAC, please kindly check technical
specifications on page 4.
Setting can be made as followed.
5.10 Display of Cosϕ Value
When RG-6T is in Manual Operating Mode, Cosϕ value and inductive/capacitive state
is always displayed. When Cosϕ value is negative,the system is capacitive and if Cosϕ value
is positive, the system is inductive.In Automatic Operating Mode, system’s present Cosϕ
value and ind./cap. state may be displayed by selecting the Cosϕ light, by means of UP-
DOWN buttons.
5.11 Display of Power Factor (PF) Value
When RG-6T is in Automatic Operating Mode (AUTO/MAN light is continuouslly ON), PF
light is selected by means of UP-DOWN buttons and sytem’s Power Factor value is displayed.
This option is disabled in Manual Operating Mode.
Important Definition:Cosϕ is defined as Displacement Power Factor and is relative to the
fundamental harmonic only. PF is defined Total Power Factor and is relative to the all
harmonics including fundamental harmonic. In a system without harmonics, PF and Cosϕ
are equal to each other.
Attention: The difference between cosϕand PF values does not mean that voltage
harmonics, which leads to problems in systems, are high on the network.
5.12 Displaying RMS Values of Voltage and Current
When RG-6T is in Automatic Operating Mode (AUTO/MAN light is ON) and Vlight is
selected, RMS value of Voltage (V) is displayed.
If Ilight is selected, RMS value of Current (I) is displayed. Displayed current and voltage
values are of the phase where CT is connected. These options are disabled in Manual
Operating Mode.
5.13 Display of Active Power (W) Value
When RG-6T is in Automatic Operating Mode (AUTO/MAN light is continuouslly ON) and
Wlight is selected by means of UP-DOWN buttons, system’s Active Power value is displayed.
This option is disabled in Manual Operating Mode.
5.14 Display of Reactive Power (VAr) Value
When RG-6T is in Automatic Operating Mode (AUTO/MAN light is continuouslly ON) and
VAr light is selected by means of UP-DOWN buttons, system’s Reactive Power value is
displayed. This option is disabled in Manual Operating Mode.
5.15 Display of Apparent Power (VA) Value
When RG-6T is in Automatic Operating Mode (AUTO/MAN light is continuouslly ON) and
VA light is selected by means of UP-DOWN buttons, system’s Apparent Power value is
displayed. This option is disable in Manual Operating Mode.
6. DESCRIPTION
6.1 Errors and Warnings
The Alarm Relay is activated if the following “errors” occur.
6.1.1 Over Voltage
I f the phase-neutral voltage of the L1 phase exceeds or equals to preset Over Voltage
Value (between 240-275V), then RG-6T waits for 3 seconds. At the end of 3 seconds if
there is still over voltage, then OVER VOLTAGE LED turns on. Depending on selection
of Over Voltage Protection Function (Pls. refer to 5.9), RG-6T switches off all the capacitor
steps or continues to compensation.
Over Voltage error disappears, if set Over Voltage value decreases by 4VAC.
In this case, OVER VOLTAGE LED turns off and RG-6T continues to compensation.
6.1.2 Insufficient Compensation
When target power factor is not reached although all the capacitor steps have
been connected, INSUFFICIENT COMPENSATION’s light is ON and the Alarm
Relay is activated.
6.1.3 Over Compensation
If the system is still capacitive although all the capacitor steps are disconnected,
OVER COMPENSATION light is ON and Alarm Relay is activated.
6.2 Target Cosϕ
The target Cosϕ value can be adjusted between 0.85-1.00 inductive. RG-6T
connects capacitors in order to bring system’s power factor to the adjusted value.
The adjusted value is defined as 1.25xQC1 value.Switching operation occurs out
of this region.
6.3 Adjustable Step Switching Time
Step switching on/off delay time can be adjusted between 2 sec.-1800 sec.
Warning: Shorter time than above range can lead to damage in capacitors
and conductors.
If capacitor banks do not have discharge coils, the delay time must be
selected over 14 seconds. The selected delay time must not be shorter than
the manufacturer’s instruction.
6.4 Switching Program Selection
RG-6T has 5 different program modes which determines the power ratio sequence
of the capacitor steps:
PS1 selection ===> 1: 1: 1:.......: 1
PS2 selection ===> 1: 2: 2:.......: 2
PS3 selection ===> 1: 2: 4:.......: 4
PS4 selection ===> 1: 2: 4: 8:...: 8
PS5 selection ===> may be all of the above
6.4.1 RG-6T Capacitor Sequence Examples
The power ratio selection between capacitor steps is very important. When choosing
the ratio beetween the power of capacitor steps , the rating of each capacitor step
value may exceed that of the first by a maximum amount equal to the total of the
preceding capacitor steps value. So the first step value will be the smallest one
and the following steps must be the multiplies of the first step.
Example: If the first capacitor power is 5 kVAr, the capacitor power sequence of the following
capacitors are as followed:
PS1 selection ===> 5. 5: 5:...............: 5
PS2 selection ===> 5: 10: 10:...........: 10
PS3 selection ===> 5: 10: 20:...........: 20
PS4 selection ===> 5: 10: 20: 40:.....: 40
PS5selection ===> may be all of the above
POWER FACTOR CONTROLLER
RG-6T
SET
SET
UP
DOWN
SET
UP
DOWN
SET
SET
UP
DOWN
SET
UP
DOWN
OVER V.W
VAr
VA
M
Scroll to "OVER V." by UP/DOWN
buttons.OV is displayed.
Push SET button for Over Voltage
Protection setting. Either O OF or
preset over voltage value is
displayed.
Select either O OF to cancel Over
Voltage Protection Function or select
a voltage value by UP/DOWN buttons.
Push SET button 3 seconds and enter SET
Menu.
Push SET button to store the selected value. RG-6T returns to normal
operating mode.
CTR light is selected by means of UP-
DOWN buttons. Ct symbol is displayed.
Current Transformer Primary Value is selected
by pressing SET button. Previously selected
CTR value is shown on the display.
A value between 5--10000 is adjusted by
using UP-DOWN buttons.
By pressing SET button 3 seconds,SET
Menu is started.
When targeted value is displayed, it is stored by
pressing SET button and RG-6T returns to its
normal operating mode.
OVER V.W
VAr
VA
M
V
Normal Voltage Over Voltage
3 sec. t (sec.)
DU
AV AC
BV AC
A: (Selected Over Voltage)
B: (Selected Over Voltage - 4 V AC)
3
P
Q
-Q ϕ:adjusted value
1.25xQC1
ϕ
Display
Display

Two different switching programs exist in RG-6T :
a)Rotational Switching :Thisswitching program is rotationalbetweenequal steps in theclockwise
direction. This ensures that the capacitor switching cycles are uniformly
distributed over all steps and to provide minimum switching steps for
maximum service life time of the system.
There are 4 different rotational switching program
options.(PS1,PS2,PS3,PS4)
b) Linear Operation :The switching program begins always from the first step to the last one
in both switching on and off mode. The advantage of this switching
program is the possibility of a large selection of capacitor steps conform
tothe step function ratiorule asexplained above. The maximum possible
ratio is “x:2x:4x:8x:16x....”.
This switching program is selected by PS5 option.
6.5 Step Number Selection
By selecting the step number, the extra time is spent connecting on/off the unused
capacitor steps is eliminated. As a result,compensation system is used more effectively
and efficiently. If step number is not selected, RG-6T makes the compensation according
to the factory set step number which is max. available output as defined on the front
panel.
6.6 C/k Setting
The C/k value is a threshold value for switching on/off the capacitor steps. C/k is the
value obtained by dividing first step capacitor power “C” to the Current Transformer
Ratio “k”. This value is measured and calculated by RG-6T automatically, or can be
entered manually. After pressing the UP and DOWN buttons together, the C/k value is
calculated and stored in one step switching on/off time interval. The further compensation
controls are made with this stored value. In case of instantaneous change of the system’s
load, measuring process will be renewed. RG-6T will stop the measuring after 10 attempt.
It means that the C/k value couldn’t be measured due to the instability of the system’s
load. In this case, compensation control will continue with the previously stored value
in the memory.
The formula to calculate the C/k value is :
Example :
Let the power (C) of the first step capacitor is 5 kVAr and the Current Transformer Ratio
(k) is 100/5. Then the C/k value is:
C/k = 5/(100/5)=0.25
C/k value for the different C and k values are as followed :
6.7 Sensing the Energy Flow Direction
RG-6T has four quadrant measuring and operation feature. So,it is able to sense the
energy flow direction and to correct itself for right compensation.
6.8 Current Transformer (CT) Selection
A separate CT must be always used for the Power Factor Controller. The wires connecting CT
to Power Factor Controller must be as short as possible and the diameter of wire not less than
1.5 mm. Since the current information is supplied by CT, the right selection of CT is very
important. The secondary current of the selected CT must comply with the following current
limits for correct measuring.
Minimum=0.05 mA, Maximum=5.5 A (Minimum C/k Ratio must be 0.02)
7. ERROR DESCRIPTIONS
7.1 Wrong Cosϕ
Current and Voltage phase connectionsare not correct.
7.2 Insufficient Compensation
The power value of the capacitor steps may be decreased by time. The fuses which are
connected to the capacitors may be out of order. The power of the capacitor steps may be
insufficient to compensate the system.(In this case, user must increase the capacitor power.)
7.3 Over Compensation
This occurs (especially at weekends, nights etc.) due to capacitive load current drawn by
devices like ballasts, constant steps, etc. The contactor’s contacts switching the capacitor
steps may have stuck to each other due to the instantaneous over current.Unnecessary
capacitor steps may have switched on manually.
7.4 Over Voltage
The phase-neutral voltage of L1 has exceeded the preset Over Voltage Value.
8. EASY INSTALLATION RECOMMENDATION (IMPORTANT NOTICE)
When the load is unstable and varies very quickly, the C/k calculation process may take
long time or in some cases it can not be calculated properly or can be miscalculated which
may cause improper compensation. A practical way to prevent this situation is as followed:
1- Turn on the compensation board without connecting the load current. Only the capacitors
will be in operation in this situation (You can do this by switching off the load current
temporarily).
2- Start the C/k calculation process by pressing the UP and DOWN buttons at the same
time. Now , depending on the power of the first step, C/k value is calculated very accurately
by RG-6T. The calculated C/k value will automatically be stored in the memory. You can
switch the load on. This C/k value will be kept in the memory until it is recalculated or
changed manually.
POWER FACTOR CONTROLLER
RG-6T
10. DIMENSIONS
9. TECHNICAL SPECIFICATIONS
Rated Voltage (Un)
Operating Voltage Range (∆U)
Operating Current Range (∆I)
Rated Frequency
Measuring Class
Power Consumption
Output Contact
No-Volt Feature
Setting Range
Time Delay
Over Voltage Values
Factory Set Values
Number of Steps
Ambient Temperature
Display
Equipment Protection Class
Wire Section (For Terminal Block)
Terminal Block Protection Class
Protection Class
Connections
Dimension
Switchboard cut-out
Weight
*These supply voltages are adjusted upon request.
: Please look at the back label. : (0.9-1.1)xUn
: 50 mA-5.5A
: 50 Hz / 60 Hz
: 1% ±1digit (V,I,cosϕ), 2% ±1digit(W,VAr,VA)
: Current: <2 VA
Voltage: 3 VA- 10 VA
: 3 A ,750 VA (NO Contact)
: In case of power failure longer than 200 msec.all
capacitor steps are disconnected automatically.
: Manual C/k Setting:0.02-1.0
CosϕSetting:0.85 (ind.)-1.00
CT Ratio:5-10000
: Between 2 sec.-1800 sec.
: 240-275 V (Selectable) (Un= 220, 230, 240 V AC )
410-480 V (Selectable) (Un= 380, 400, 415 V AC )
105-140 V (Selectable) (Un= 100, 110 V AC )
: Cosϕ=1.00(ind.) , Step Time=7 sn.
Program=PS5 , C/k=0.05
CT Ratio =5
: RG-12T(max 12) ; RG-8T(max 8)
RG-6T(max 6) ; RG-5T(max 5)
: -5°C - 55°C
: 4 Digit ,Red Display
: Double Insulation-Class ll (
): 2.5 mm2
: IP 00
: IP 40
: Socket terminals with screw
: Type PR16, Type PR19 (Only RG-6T)
: 139x139 mm
: 0.8 kg.
Type PR16
143
99
121
138.4
143
18
34.5
67
Type PR19
79
90
90
70
90
A2936/Rev.3
4
1.00
0.83
0.63
0.50
0.40
0.33
0.25
0.20
0.17
0.13
0.83
0.63
0.50
0.42
0.31
0.25
0.20
0.17
0.13
0.10
0.08
0.06
1.00
0.75
0.60
0.50
0.38
0.30
0.24
0.20
0.15
0.12
0.10
0.08
30/5
50/5
75/5
100/5
150/5
200/5
300/5
400/5
500/5
600/5
800/5
1000/5
1250/5
1500/5
2000/5
2500/5
3000/5
4000/5
0.83
0.50
0.33
0.25
0.17
0.13
0.08
0.06
0.05
1.00
0.67
0.50
0.33
0.25
0.17
0.13
0.10
0.08
0.06
0.05
0.83
0.63
0.42
0.31
0.21
0.16
0.13
0.10
0.08
0.06
0.05
1.00
0.75
0.50
0.38
0.25
0.19
0.15
0.13
0.09
0.08
0.06
0.05
1.00
0.67
0.50
0.33
0.25
0.20
0.17
0.13
0.10
0.08
0.07
0.05
0.83
0.63
0.42
0.31
0.25
0.21
0.16
0.13
0.10
0.08
0.06
0.05
1.00
0.75
0.50
0.38
0.30
0.25
0.19
0.15
0.12
0.10
0.08
0.06
0.05
1.00
0.67
0.50
0.40
0.33
0.25
0.20
0.16
0.13
0.10
0.08
0.07
0.05
CTR
(k) Power of Capacitor Step (kVAr)
(C)
510 12.5 15 20 25 30 40 50 60 100 2.5
0.42
0.25
0.17
0.13
0.08
0.06
0.04
0.03
C/k = Q
k
Q: Power of the first step capacitor (kVar)
k:Current Transformer Ratio.(CTR)