GEPA RQ B Series User manual

RQ B SERIES REACTIVE POWER CONTROL RELAY
RQ B Series reactive power control relays are designed to operate for the reactive power compensation of LV distribution systems .
The logic to operate the steps is completely different from other relays. The logic is designed so that the compensation is achieved
very quic ly with most reliable operation.
Figure 1
Basic Properties:
* Automatic or manual setting of c/k
* Set Co s ø is a dj u s t a b l e b et w e e n 0,90 an d 0,9 9
* Re-connection or Re-isolation periods are adjustable
independently
* Selection of number of steps,
* 6 different sequence logic,
* Reactive / Active power ratio is displayed on the screen,
* Under voltage, over voltage and
compensation failed alarms,
* Easy programming,
* Harmonic free operation,
* Easy installation with soc et mount
* Automatic polarity sensors,
SETTINGS
Relay should be set properly according to the properties of the systems. In order to achieve best relay operation, all settings should
be done properly and the oeration of all signal leds must be read carefully. The front view of the relay is at Figure 1.
1-C/k Setting:
Press Set button until “c/ ” led is on .
Set c/k value to the desired value using up or down buttons
Pr e s s Se t button again and c/ value will be stored in the memory and Set C o s ø led will be on.
set
set

In case no additional buttons are pressed , the relay will operate automatically within
10 seconds as programmed..
C/ is adjustable between 0,03 and 1,15 with 0,01 steps
If “ot o ” is displayed on the screen, c/ was set automatically and the relay will set c/ value by itself automatically.
2-Seting Cosø :
Press Set button until “Set C o s ø” led is on.
Adjust Set C o s ø to the desired value using up and down buttons.
Pr e s s Se t button again, Set C o s ø will be stored in the memory and “Ton ” led will be on.
In case no additional buttons are pressed, the relay will operate automatically within
10 seconds as programmed
Set C o s ø is adjustable between 0,90 and 0,99 with 0,01 steps.
3-Ton re-connect delay) setting:
Press Set button until “ To n ” led is on.
Adjust Ton to the desired value using up and down buttons.
Pr e s s Se t button again, To n will be stored in the memory and
“T off” led will be on.
In case no additional buttons are pressed, the relay will operate automatically within
10 seconds as programmed
Ton (re-connect delay ) is adjustable between 1 and 250 seconds
4-Toff re-isolation delay) setting:
Press Set button until “ T o ff ” led is on.
Adjust Toff to the desired value using up and down buttons.
Pr e s s Se t button again, Toff will be stored in the memory and
“Steps” led will be on.
In case no additional buttons are pressed, the relay will operate automatically within
10 seconds as programmed
Toff (re-isolation delay ) is adjustable between 1 and 100 seconds
5-Steps setting:
set
set
set
set
set
set

Press Set button until “ Steps” led is on
Adjust the number of Steps to the desired value using up and down buttons.
Pr e s s Se t bu tton again, Steps will be stored in the memory and
“Sequencel” led will be on.
In case no additional buttons are pressed, the relay will operate automatically within
10 seconds as programmed
6-Sequence:
Press Set button until “ Sequence” led is on
Adjust Sequence to the desired value using up and down buttons.
Pr e s s Se t bu tton again, Sequence will be stored in the memory and
“O.V.set” led will be on.
In case no additional buttons are pressed, the relay will operate automatically within
10 seconds as programmed
Relay has 6 different sequence logic.
a)1.1.1.1.1.... .....1 system, displayed as 1.1.1.
b)1.2.2.2.2...........2 system, displayed as 1.2.2.
c)1.2.3.3.3...........3 system, displayed as 1.2.3.
d)1.2.4.4.4...........4 system, displayed as 1.2.4.
e)1.2.3.6.6...........6 system, displayed as 1.2.6.
f) f)1.2.4.8.8............8 system, displayed as 1.2.8.
7-O.V. Set: Over voltage setting):
Press Set button until “ O.V.set” led is on.
Adjust O.V.set to the desired value using up and down buttons.
Pr e s s Se t bu tton again, O.V.set will be stored in the memory and
“Manuel” led will be on.
In case no additional buttons are pressed, the relay will operate automatically within
10 seconds as programmed
O. . s e t is adjustable between 250 and 299 seconds
8-Manual / Automat c select on:
set
set
set
set
set
set

Press Set button until “ Manuel” led is on.
Using up and down buttons, you can adjust manual mode “001” or “000” on the display for automatic operation.
Pr e s s Se t bu tton again, manual / automatic selection will be stored in the memory and relay will start functioning.
At manual mode, “M a n u e l ” led starts blin ing that means manual operation is on.
At manual mode, you can connect the capacitor steps using up button and disconnect the capacitor steps using
down button.
In order to connect one step, press up button for a while and “C+ ” led’ will be on, according to the adjusted “To n ” , the desired step
will start to operate properly. In order to connect an additional step, same operation is repeated.
In the same logic, in order to disconnect a set, pres down button for a while and “C – “ led will be on, after the adjusted “To f f ”, the
step will be disconnected.
SIGNALS
On the top of the front panel, there are equal number of leds to the number of steps. Therefore, it’s easy to follow which steps are
connected. The functionn of the other leds are as follows:
“C + “ led is on means the system need capacitors and after Ton period, the following capacitor step will be connected
“C – “ led is on means the system is over compensated and at the end of Toff period, the proper capacitor step will be disconnected
“N o r m a l ” led is on means the system is well compensated.
“C a p . ” led is on means the load is capacitive
“nd.İ” led is on means the load is inductive
“C o s ø ” led is on displaying the present cosø (power factor)
“Q/P (%)” led is on displaying the present ratio of reactive power to active power
For example, the display reading “0,25” and “ind ” led’ is on, it means the present ratio of reactive power to active power is 25%.. In
similar manner, the display reading “0.10” and “Ca p . ” Led’ is on, it means the present ratio of reactive to active power is capacitive
10%
In order to read “Q/P (%)” press any up or down button for a while. (Relay should be in automatic mode)
At normal display, the screen will show pr e s e n t co s ø . In order to read the ratio of reactive power to active power, press any up or
down button for a while and the display will read Q/P(%) for about 10 seconds. After 10 seconds co s ø value will be displayed
automatically. In order to return reading cos ø , pres any up or down button for while
SWITCHING
The switching logic of the relay depends on the selectedsequence type, either rotating systems or double rotating system. In this
logic, the capacitor steps will be switched equally for long periods .
1.1.1.............1 system rotating system
1.2.2.............2 system rotating system.
1.2.3.3 .........3 system double rotating systems
1.2.4.4..........4 system double rotating system
1.2.3.6..........6 system double rotating system
1.2.4.8.8.......8 system double rotating system
Let’s explain a double rotating system.
For example 1.2.3.6..........6 system is selected . In this case the first 3 steps 1.2.3 are rotating internally and the other steps are
rotating internally. Ton is adjustable between 1 and 250 seconds and Toff is adjustable between 1 and 100 seconds.
set
set

But there’s internal protection so that no step is re-connected before 45-50 seconds since this period is required for the capacitor unit
to discharge. Otherwirse there’ll be over voltages on the capacitor unit which wiill cause damages.
In the same logic, no step is connected before 45-50 seconds if the supply voltage (system voltage) is off and on again.
In the switching logic, the amount of the reactive power required as well as the rotating system logic are also important . The relay
will decide to connect or disconnect the proper step according to the power required.
OVER and UNDER VOLTAGE PROTECTION
If the supply voltage exceeds an adjusted value between 250 Volt and 299 Volt, the “O.V.set” led will start blin ing. İf the over
voltage continues longer than 2-3 seconds, the relay will disconnect all steps. And the display will read “A G r ” blin ing meaning that
there was over voltage.
If the supply voltage is approximately 5V below the set value, “A G r ” will be cleared and the display will start reading the present
co s ø value.The relay will start to operate properly and if necessary, it’ll start to connect the capacitor stpes.
If the supply voltage is below 160 Volts, all steps are disconnected automatiically and the display will read “d gr ” meaning under
voltage
If the supply voltage is over 165 Volts again,”dgr” will disappear on the screen and the present c o s ø value will start reading on the
display. The realy will start to operate properly and if necessary, it’ll start to connect the capacitor steps.
AUTOMATIC POLARITY ADJUSTMENT :
In case the terminals “ ” and “l” of the current transformer are not connected in the proper sequence , the relay will sense and
corrects this mista e .
But it’s important to connect the supply voltage and the current transformer from the same phase of the networ .
If the supply voltage and the current transformer are at different phases, the polarity adjustment will not operate and the
relay will not function properly since the input datas are not correct.
ALARM:
If normal led is off within 5 minutes after all capacitors are in operation or all capacitors are disconnected, that means a problem with
compensation. In this case, “Alr ” is displayed and starts blin ing . At the same time, alarm relay operates, and alarm contacts will
function. After the system becomes normal, “Alr ” is cleared on the screen and c o s ø value is displayed again.
CONNECTION AND COMMISSIONING :
The connection of the relay is at Figurel 2. As a sample, 7-step relay connection is included in the figure. Every relay has its own
connection diagram at the rear panel .
The important points for the connection are as follows;
The voltage supply and the current transformer should be on the same phase. In case the voltage supply and CT phase don’t match,
the cosø value on the display will be wrong and the relay will not function properly..
The current transformer should be connected at the load before the capacitor units, the CT current should read both the load and
capacitor currents.
The phase voltage should be connected to the terminal no.2 of the relay via 6A fuse, the neutral of the supply voltage should be
connected to terminal no.1 on the relay .
As described in the Setting section, , “c/k ” , “Set Co s ø ” , “To n ” , “Toff ” , “Steps, ” “Se q u e n c e ” and “O.V.set” values are adjusted
properly. If C/k set is at automatic setting, the relay will choose the proper c/ and start to function.
In case c/k set value is to be adjusted manually, please use selection Table 1.
Even the factory setting are not changed, in most cases the result and functionality is successfull. In case the load is variable, too
low , too much, it’s advised to choose sequence 1.2.3.6........6 or 1.2.4.8...........8 for beter results.
TECHNICAL PROPERTIES

Supply Voltage : 220V AC ± %15 50 Hz
Rated Current : ...../5A
Power consumption : 5W
Current circuit
consumption : 0,2VA I=5A’de
Over current
Withstand : Continuous 10A, 50A for 1 sec.
Over voltage
Protection : 250-299V adjustable.
: 3 sec. delay
Under Voltage
Protection : 160V
No voltage
Protection : All steps are disconnected for
no voltage more than 50 msec.
c/ set : 0,03 – 1,15 or automatic c/ set
Set Cosø : 0,90 – 0,99
Sequences : 1.1.1. .......... 1
1.2.2. .......... 2
1.2.3. .......... 3
1.2.4. .......... 4
1.2.3.6..........6
1.2.4.8..........8
Contacts : Same as number of steps
Contact capacity : 250 VAC 8A
(at Cosø=1.00)
Cosømeter
range : 0,01 ind. – 0,01 Cap.
Cosømeter accuracy
class : ± %1,5 ± 2 count
Q/P measuring range : % 0 - % 100
Q/P error accuracy : ± %1,5 ± 2 count
Ambient temperature : -10ºC ; + 50ºC
Dimensions : 144x144x90
Panel drill dimensions : 138x138mm
Net Weight : 1,2 Kg.

Figure 2
CT
Ratio
Capacitor Size ( VAr)
1 2,5 5 10 15 20 25 30 40 50 60 100
30/5 0,16 0,41 0,83
50/5 0,1 0,25 0,5 1
75/5 0,06 0,16 0,33 0,66 1
100/5 0,05 0,12 0,25 0,5 0,75 1
150/5 0,03 0,08 0,16 0,33 0,5 0,66 0,83 1
200/5 0,06 0,13 0,25 0,37 0,5 0,62 0,75 1
250/5 0,05 0,1 0,2 0,3 0,4 0,5 0,6 0,8 1
300/5 0,04 0,08 0,16 0,25 0,33 0,41 0,5 0,66 0,83 1
400/5 0,03 0,06 0,12 0,18 0,25 0,31 0,37 0,5 0,62 0,75
500/5 0,05 0,1 0,15 0,2 0,25 0,3 0,4 0,5 0,6 1
600/5 0,04 0,08 0,12 16 0,2 0,25 0,33 0,41 0,5 0,83
800/5 0,03 0,06 0,09 0,12 0,15 0,18 0,25 0,31 0,37 0,62
1000/5 0,05 0,07 0,1 0,12 0,15 0,2 0,25 0,3 0,5
1200/5 0,04 0,06 0,08 0,1 0,12 0,16 0,2 0,25 0,41
1500/5 0,03 0,05 0,06 0,08 0,1 0,13 0,16 0,2 0,33
2000/5 0,03 0,05 0,06 0,07 0,1 0,12 0,15 0,25
Table:
1 c/ set selection table
C1
C3
C5
k
l
vv
v v
v
v
C9
C10
C11
v
v
v
C12
ALR
R
S
T
Mp
5
2
1
6A
6
322 21 20 19 18 17 16 15 14 13 12 11
C8 C7 C6 C4 C2
vv
v

GEPA
K o m p a n z a s y o n
c
H e d e f c o s Ø
T
K a d . s a y ý s ý
S ý r a la m a
A .G .a y a rý
M a n u e l
o n
T
o ff
N o r m a l
C
C a p . In d .
1 2 3
4 5 6 7 8
9 10 11 12
Q /P (% ) c o s ø
R Q -1 1 2 B R e a k t i v e P o w e r C o n tr o l R e la y
s et
/
k
C+
-
144
70
90
138
138
Panel window with
144
v
v
v
v
v
v
v
v
v
v
v
v
GEPA
K o m p a n z a s y o n
c
H e d e f c o s Ø
T
K a d . s a y ý s ý
S ý r a l a m a
A .G .a y a r ý
M a n u e l
o n
T
o ff
N o rm a l
C
C a p . In d .
1 2 3 4 5 6 7
8
9 10 11 12
Q /P (% ) c o s ø
s et
/
k
C+
-
R Q B S E R IE S R E A C T Ý E
P O W E R C O N T R O L R E L A Y

GEPA
GEPA
K o m p a n z a s y o n
c
H e d e f c o s Ø
T
K a d . s a y ý s ý
S ý r a l a m a
A .G .a y a r ý
M a n u e l
o n
T
o ff
N o rm a l
C
C a p . In d .
1 2 3 4 5 6 7
8
9 10 11 12
Q /P (% ) c o s ø
R Q -1 1 2 B R e a c tiv e P o w e r C o n t r o l R e la y
s et
/
k
C+
-
R Q B S E R IE S R E A C T Ý E
P O W E R C O N T R O L R E L A Y