Two different switching programs exist in RG-6T :
a)Rotational Switching
: This switching program is rotational between equal steps in the clockwise
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
to the step function ratio rule as explained 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 Cos
ϕ
Current and Voltage phase connections are 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,cos
ϕ
), 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
Cos
ϕ
Setting: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 )
: Cos
ϕ=
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 mm
2
: 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)
5
10
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)