Entes RG-B Series User manual

POWER FACTOR CONTROLLER
RG-B/BS
DIMENSIONS
Do not use device without checking terminal connections.
CONTROLS and OPERATIONS
Capacitor values are recognized and saved with ASEt operation. For doing this, enter
program menu at device and find ASEt menu. ASEt menu includes 2 parameters
which are S-oF and S-on.
When selection S-on and pressing SET button; firstly device try to find connection
failures (such as wrong connection at voltage and current inputs) then recognize all
capacitors steps. If 10th program (PS-10) is selected, all capacitors power will be
measured. In other programs, only first capacitor step power is measured and other
capacitor steps are calculated and recorded according to selected program. During
capacitor recognition, S-oF is selected and pressing SET button, automatic recognition
will be ended.
Note: After this process, calculated power values of all capacitor steps always
must be controlled. In order to have correct power values for capacitor steps,
current and voltage transformer ratios must be entered correctly. If current and
voltage transformer ratios are not entered, these ratios are supposed to be 1
and capacitor powers are calculated according to these values.
(Refer to VT and CT ratio settings).
Note: If automatic setup is selected as S-on, automatic mode starts immediately
without waiting to escape from the menu.
Automatic Capacitor Recognition and Phase Setup Mode
1
For proper operation, current and voltage connections must be connected as
shown in the connection diagram.
After current and voltage terminal connections, capacitor steps connection must
be done according to the connection diagram.
Lastly, computer communication connection must be done.
Do not power-up the device before verifying terminal connections.
1. RG-B/BS Connection
a)
b)
c)
d)
Device can detect wrong connection on the way of active power. For correcting connection
fault, automatic setup must be mode or in transformer menu there is a sub-menu named
AngL, which is programming phasor angle, suitable phase value must be programmed from
here. When user do automatic setup (ASEt), device will open and close 3 phase capacitor
in 1st step during correction of connection failure. Sudden changes in loads and nonlinear
loads (Thyristor or triac controlled frequency inverter, UPS etc.) existing, automatic setup may
not be done. In this condition, user should disconnect the device and restart it and make the
same operation. This operation can do with selecting S-on under ASEt menu. In this case
device corrects the errors and then calculates the capacitor values.If user does not want
calculating capacitor values, selecting S-oF parameter provides this.
User must be enter capacitor values after entering current and voltage transformer ratios.
Capacitor values can be calculated automatically or maually. Devices ASEt selecting
S-on (for details please look Operating Mode Settings) capacitor values will be entered
automatically. If 10th program (PS-10) is selected in program menu all capacitor values are
measured by switching on/off of the capacitors in sequence. In this program 3 phases capacitor
can be connected, without any connection rule, for network needing. If user did this application
just like at previous step, does not have to do this step. Selecting other program condition
device only calculate 1st step and other steps will be calculated according to selecting
program.
Device calculates the capacitor values which will be switched ON according to selected
program; so device switches ON / OFF the required steps.
Connection of circuit breaker or automatic fuse between the network and RG-B/BS is
highly recommended. Circuit breaker must be in close proximity to the device.
All used fuses must be FF type and the current values of the fuses must be 2A or 3A
and 6A (Refer to Connection Diagram).
Generator input must be done only when the network is supplied by the generator. Otherwise
device will be switched to the generator position for each generator starts including the
maintaining purpose.
a)
b)
c)
d)
e)
2. Commissioning RG-B/BS
Generator Input
When 110-250 V AC connection is connected to devices generator input COS1
position will be at passive, COS2 will be at active position. So, compensation will
do on target COS2 during voltage cut at this input.
CONNECTION DIAGRAM
Press SET button and enter ASEt menu (S-oF is displayed)
Select S-on option by scrolling UP/DOWN buttons.
(This parameter should be selected as ON in order to start the
Automatic Capacitor Recognition.)
Press SET button in order to activate your selection.
Press SET button 3 sec. and select Auto option.
Select ASEt parameter by scrolling UP/DOWN buttons.
Operating Mode (Automatic/Manual Mode) Settings
RG-B/BS has two operating modes which are automatic mode and manual mode.
Operating mode can be selected by selecting A-on (automatic) or A-oF (manual)
option. Manual mode is used for test purpose. In this mode, capacitor steps are
switched on&off and so relay outputs of the device are tested. In the manual mode,
capacitor steps are switched on by pressing SET button and also capacitor steps
are switched off by pressing ESC button. Factory set values for switching on (ond)
and switching off (oFd) time is 10 sec. These time values can be programmed in the
Delay (dELy) menu (Refer to delay time setting). In the manual mode, step numbers,
which will be switched on&off, can be programmed in Step menu (Refer to step
number setting). Even if manual mode is selected, after 5 minutes, device starts to
work in automatic mode and continues to operate in automatic mode.
When automatic mode is selected, AUTO/MAN LED lights on continuously.
When manual mode is selected, AUTO/MAN LED blinks.
Warning: Device warns user by blinking (short ON, long OFF) the capacitor steps
which will be switched on. Also device warns user by blinking (long ON, short
OFF) the capacitor steps which will be switched off.
For switching capacitors; voltage inputs must be connected and measured
voltage must be higher than (min. 0.5 multiple) programmed nominal network
voltage.
* Current value of 3-Fuses, which are connected to protect the capacitors, is
chosen according to the nominal current value of capacitors.
** At 3 phase 4 wire applications L1 and Neutral must be connected devices
voltage measurement inputs, at 3 phase 3 wire applications L2 and L3 phases
must be connected. L1 phases current transformer must be connected to
current measurement input. If load is unbalanced, current cable which is
nearest value of total average value must be connected to current transformer.
In this condition voltage inputs must be set refer to current. When device
programmed to automatic setup, it will program suitable phase angle. So it
will measure true values and true compensation.
Precautions for Safe Use and Installation
This user manual is prepared for quick commisioning and operating
of the device. Please read this manual carefully before commisioning
or operating RG-B/BS
Maintenance, installation and operation of RG-B/BS must be performed only by
the qualified technicians.
RG-B/BS is connected to the network with current transformer. Do not disconnect
the current transformer terminals. If you disconnect them, be sure to short-circuit
or connect them to another parallel load which have low impedance.
In case of failure, dangerously high voltage at the secondary side of current
transformer may cause an electric shock.
Device is suitable only for panel mounting.
Verify terminal connections when wiring.
Do not use this product for any other purpose than its original task.
Do not operate undervoltage.
When device is connected to the network, do not remove the front panel.
Do not open the RG-B/BSs housing. There are no user servicable parts inside
it.
Do not clean the device with solvent or similar items. Only clean with a dry cloth.
Electrical equipment should be serviced only by your competent seller.
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
No responsibility is assured by the manufacturer or any of its subsidiaries
for any consequences arising out of the use of this material.
1)Panel cut-out dimension must be 91 mm x 91 mm for Type PR19 and 143 mm x
143 mm for Type PR16.
2) Before installation, remove the mounting brackets.
3) Mount the device to front panel.
4) Insert the mounting brackets.
5) Wire thickness for voltage and current terminals must be 2,5 mm2, but it is suitable
for cables which have up to 4 mm2section.
6) CAT5 cable is recommended for RS-485 input terminal.
Excessive force can damage to the device.
Turn the screw into the terminals and tighten until the RG-B/BS is secured in
place.
70mm
79.3mm
90mm
96mm
96mm
Type PR 19
15 17 18 19 20 21 22
5 6 9 10
6A
Alarm Relay
11 12
C1 C6 C7 C12
23 24 25 26 27 30 31 32 33
N
L3
L2
L1
Fan Relay
13 14
1 2 3 4
Un Vin Iin
Generator
Input
110~250 V AC
16
1A
K L
l1k1
~ ~
TR B GNDA
RS485
L2
L3
****
Type PR16
(144x144)
143
99
121
138.4
143
18
34.5
67
RG-6B/BS
RG-8B/BS
RG-12B/BS
RG-6B/BS
RG-8B/BS
****

POWER FACTOR CONTROLLER
RG-B/BS
CURRENT and VOLTAGE TRANSFORMER RATIO SETTINGS,
PHASE ANGLE and VOLTAGE PROGRAMMING
In order to have correct power values for capacitor steps, current and voltage transformer
ratios must be entered correctly. Current and voltage transformer ratios are entered
in trF menu. If no value is entered in the menu, these ratios are supposed to be 1
and capacitor powers are calculated according to these values.
Current Transformer Ratio
CT ratio can be programmed between 1 and 2000. This value must be the Current
Transformers ratio.
Exp: For 150 A/5 A current transformer, CT ratio must be entered as "30".
Program Selection
Press SET button for 3 sec.
2
Step Number Setting
RG-B/BS has 8 capacitor steps. They can be programmed oFF, on and AUto for
each steps at 10th program.
AUto : Programming capacitor power (kVAr) menu.
on : Capacitor programmed as a steady.
oFF : Meaning of there is no capacitor connection at output.
When other programs are selected, 1st steps capacitor power can be programmed.
Other steps power can be programmed according to selected program.
* Recommended program mode.
RG-B/BS has 10 different program modes which determines the power ratio sequences
of capacitor steps. These are given at below.
If capacitors sequence is set just like 2nd program (P-02) (1.1.1.1.....), all needs same
connection compenents. Selecting between 3th program (P-03) to 8th program
(P-08) capacitors need less connection compenents (exp: 1.2.2......). 9th program
(P-09) provides different group powers. 9th programs capacitor sequence working
principle is one groups power can be higher than previous groups first power sums.
With this method less capacitors can be used. At 10th program (P-10), there is no
rule of arranging the steps from low to high. With auto setup capacitor steps can be
calculated automatically or user can enter the capacitor values manually. User can
select steady or not used capacitor steps from CAP menu at 10th program.
RG-B/BS counts the number of switch on/off of every steps and every time switchs
on required steps. With this method it saves capacitors life time duration.
Enter your required program such as below definition.
Press SET button 3 sec. and select Auto option.
Press SET button and enter AUto menu. (A-on is displayed)
Select A-on or A-oF option by scrolling UP/DOWN buttons.
In order to activate the selection, press SET button.
Press SET button for 3 sec.
Select Prog menu by scrolling UP/DOWN buttons.
Press SET button in order to see preset program number (Exp: 10).
Select desired program number (1-10) by scrolling UP/DOWN buttons
Press SET button to confirm your selection.
Press ESC button until SAVE is displayed.
Press SET button to save your changes or ESC button to exit without
saving.
Phase Angle Setting
Changing phase angle for all possibility of current and voltage connections. If
user knows phases, which are connected to measurement inputs, can be set at
this menu as a manual. Automatic setup (ASEt) is recommended for this application.
End of ASEt application, present connection displayed at this menu.
-It can be programmed 30 degress differences between 0 to 360
(0, 30, ...., 330).
Press SET button for 3 sec.
Select trF menu by scrolling UP/DOWN buttons.
Press SET button and select Utr option.
Select An9L/U-no option by scrolling UP/DOWN buttons.
Press SET button to enter Phase Angle / Operating Voltage value.
Enter phase angle between -150° to 180° (programmed 30 degress
differences) or operating voltage value by scrolling UP/DOWN buttons
(Use SET or ESC button to set next digit or previous digit)
Press SET button to confirm your selection.
Press ESC button until SAVE is displayed.
Press SET button to save or ESC button to exit without saving.
Operating Voltage Programming
Nominal voltage programming at the network. For making true compensation measured
voltage value must be higher than min. 0.5 multiple of programming nominal network
voltage.
Select trF menu by scrolling UP/DOWN buttons.
Press SET button and select Utr option.
Select Utr / Ctr option by scrolling UP/DOWN buttons.
Press SET button to enter Voltage / Current Transformer Ratio.
Enter VT or CT ratio between 1-2000 by scrolling UP/DOWN buttons.
(Use SET or ESC button to set next digit or previous digit)
Press SET button to confirm your selection.
Press ESC button until SAVE is displayed.
Press SET button to save or ESC button to exit without saving.
Voltage Transformer Ratio
VT ratio can be set between 1-2000. This value must be the Voltage Transformers
ratio.
Exp: For 34,5 KV / 100 V voltage transformer, VT ratio must be entered as 345.
L2
L3
Phase 0°
L2
L3
Phase 180°
L2
L3
Phase 240°
L2
L3
Phase 60°
L2
L3
Phase 120°
L2
L3
Phase 300°
L2
L3
Phase 30°
L2
L3
Phase 210°
L2
L3
Phase 150°
L2
L3
Phase 330°
L2
L3
Phase 270°
L2
L3
Phase 90°
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
Auxiliary
Supply
Voltage
Measurement
Input
Current
Measurement
Input
PROGRAM SEQUENCE
01
02
03
04
05
06
07
08
09
*10
linear
1.1.1.1................
1.1.2.2................
1.2.2.2................
1.2.3.3................
1.2.4.4.................
1.1.2.4................
1.2.3.4................
1.2.4.8................
Any sequence can be selected by user.
Available Programs

Please look at the rear label of the device
(0.9-1.1)xUn
50mA-5.5A
50 Hz / 60 Hz
1% ±1digit (V,I,Cosj),
2%±1 digit (W, VAr, VA)
<2 VA(Current)
3 VA - 10 VA (Voltage)
5 A, 250 V AC, 1250 VA
110V AC ~ 250 V AC
In case of power failure longer than 20 msec., all capacitor steps are
disconnected automatically.
-0,800, 0,800
-0,800, 0,800
1 - 2000
1 - 2000
Switching on&off and discharge times can be set between 2-1800 sec.
8
Selectable.
-5° C - 55° C
00.0 - 100 °C
Red LED Display with 4 Digits
Double Insulation ( )
2.5 mm2
IP 00
IP 40 (front panel)
Terminal
Type PR19
91x91 mm
0.70 kg.
1-247
1.200 Kbps, 2.400 Kbps, 4.800 Kbps, 9.600 Kbps, 19.20 Kbps, 38.40 Kbps
no, odd, even
1,000
0,900
P-10
10 sec.
10 sec.
14 sec.
265.0 V AC
3.0 sec.
oF
5.0%
3.0 sec.
oF
25
15
240 hour
55 °C
oF
53 °C
45 °C
40 °C
1
1
1
9.600 Kbps
no
1234
oFF
Operating Voltage (Un)
Operating Voltage Ratio DU
Operating Current Range DI
Frequency
Measurement Class
Power Consumption
Output Contact
Generator Input
No-Volt Feature
Setting Range
COS1 Setting
COS2 Setting
CT Ratio
VT Ratio
Switching on&off and,
Discharge Time Setting
Step Number
Over Voltage Value
Ambient Temp. Range
Measurement Temp. Range
Display
Equipment Protection Class
Cable Section (for terminals)
Terminal Protection Class
Box Protection Class
Connection Type
Dimension
Panel Cut-out
Weight
RS-485 Communication*
Address
Baud Rate
Parity
Default Factory Settings
Target COS1
Target COS2
Program
t-on (Switching on delay)
t-off (Switching off delay)
Discharge time
Over Voltage
Delay
Step Protection
Over Harmonic
Delay
Step Protection
Inductive Ratio Range
Capacitive Ratio Range
Ratio Time
Temperature Protection
Alarm Value
Step Protection
Lower Alarm
Fan Setting
Operation Temperature
Lower Temp. Value
CT Ratio
VT Ratio
RS-485 Communication
Address
Baud Rate
Parity
Password
Password Activation
Technical Features
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POWER FACTOR CONTROLLER
RG-B/BS
3
In case of any failure, alarm relay is switched on and alarm led lights.
When measured temperature value increase fan measured value after 10
second fan led light will be on.
Shows the status of each capacitor steps.
Indicates if the operating mode is automatic or manual.
(If it is continuously ON, RG-B/BS operates in Automatic Mode. If it blinks,
RG-B/BS operates in Manual Mode)
Press SET button for 3 seconds, when Cosj/Auto Setup LED is open,
automatic setup is done. In measurement mode Cosj value is displayed.
Press SET button for 3 seconds, when V / CosjLED is open COS1 and
COS2 is programmed. In measurement mode voltage value is displayed.
Press SET button for 3 seconds, select PROGRAM/I light to select power
sequence program. In the measurement mode, current values of related
phases are displayed.
Press SET button for 3 seconds, select TIME/W led to set switching on delay
time, switching off delay time and discharge time.
In the measurement mode, active power value is displayed.
Press SET button for 3 seconds, select CAPACITORS/VAr led to set capacitor
values and capacitor connections (AUto, on, oFF).
In the measurement mode, reactive power values are displayed.
Press SET button for 3 seconds, select RESET/VA LED for erasing alarms.
In measurement mode apparent power value is displayed.
Press SET button for 3 seconds, select NETWORK/% LED to set current
transformer ratio (Ctr), Voltage transformer ratio (Vtr), phase angle (AngL)
and capacitor nominal voltage value (U-no) is set. In measurement mode
inductive and capacitive ratio values are displayed as %.
Press SET button for 3 seconds, select ALARM / °C LED to set alarms for
over voltage, reactive/active ratio, temperature and harmonics. In
measurement mode temperature is displayed.
1.
2.
3. 1,2,...,8 LEDs
4. OTO/MAN LED
5. Cosj/Auto Setup LED
6. V / CosjLED
7. I / Program LED
8. W / Time LED
9. VAr / Capacitor LED
10. VA / Reset LED
11. % / Network LED
12. °C / Alarm LED
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Press SET button 3 seconds, select RS-485/THD LED for setting address,
baudrate and parity values for RS-485 communication protocol. In measurement
mode THD values (19th harmonics) is displayed by pressing SET button.
Press SET button 3 seconds, select PIN/ERR LED for setting and changing
password in measurement mode if any error happens this LED will be on (If
there are more than one error, errors code is displayed by pressing SET button).
Go to next menu or increase related value.
Exit from a menu. In the measurement mode, it is used to exit from harmonic
menu.
Enter to a menu or confirm the data entry. In the measurement mode, it is used
to observe the harmonic values of current, voltage and power values.
Go to the previous menu or decrease related value.
This LED represents that RG-B/BS is waiting for switching capacitor steps on.
This LED represents that RG-B/BS wil not switch any capacitor steps on&off
This LED represents that RG-B/BS is waiting for switching capacitor steps off.
If capacitor is not connected to the related step,   lights is ON.
If reactive energy ratios exceed adjusted set values, % led lights.
If voltage harmonic ratios exceed adjusted set values,   led lights.
When the value of voltage exceeds adjusted set value or devices measured the
value of voltage less than 30V or when devices can not measure current during
auto setup, V> light is ON.
Represents measurement values with kilo unit (x103).
Represents measurement values with mega unit (x106).
13. THD / RS-485 LED
14. Err / Pin LED
15. Up Button
16. Esc Button
17. Set Button
18. Down Button
19. C+ LED
20. Normal LED
21. C- LED
22.
23.
24.
25. V>
26. k LED
27. M LED
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Delay Time Setting
Switching ON (ond), Switching OFF (oFd) and discharge time (rC) is programmed
for the steps.
Delay time between 2 and 1800 sec. can be set in this menu.
Press SET button for 3 sec.
Select dELy menu by scrolling UP/DOWN buttons.
Press SET button and select ond parameter. (Exp:10)
Select ond / oFd / rC option by scrolling UP/DOWN buttons.
Press SET button.
Enter delay time between 2-1800 sec. by scrolling UP/DOWN buttons.
(Use SET or ESC button to set next digit or previous digit)
Press SET button to confirm your selection.
Press ESC button until SAVE is displayed.
Press SET button to save your changes or press ESC button to exit
without saving.
4
27
22
26
31 2
5
6
7
8
9
10
11
12
13
14
15
16
17
18
23
24
25
19
20
21

POWER FACTOR CONTROLLER
RG-B/BS
4
A4182/Rev.3
NO DESCRIPTION REASON
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
ALARM CODES
LED
-
-
Phase voltage dont exist
Phase current dont exist
-
-
THD for voltage exceeds the present value
Voltage value of any phase exceeds the present menu
Reactive capacite ratio exceeds the present value
Reactive inductive ratio exceeds the present value
Temperature of capacitors exceeds the present value
Automatic connection could not be found
Over compensation
Insufficient compensation
RST level sequencing is incorrect
-
-
-
Capacitor step 1 is defected
Capacitor step 2 is defected
Capacitor step 3 is defected
Capacitor step 4 is defected
Capacitor step 5 is defected
Capacitor step 6 is defected
Capacitor step 7 is defected
Capacitor step 8 is defected
-
-
-
-
-
-
-
These programs are set for protecting capacitors by user.
Programmable Alarm Protection
Over Voltage Protection Setup
Protecting capacitors from over voltage. It has 3 parameters.
SP-U : It can be programmed between 0-500 V. Setting to 0 means
alarm is shutted down.
dELy : Delay time. It can be programmed between 0-9999 sec.
CAP : It shows step situation in alarm condition. Selecting on parameter
protects capacitor steps. Selecting oF parameter switches off capacitor
steps.
Over THDV Protection Setup
Exceeding programmed THDV value situation, device gives alarm. It has
3 parameters.
SP-t :%THD can be set between 0-99.9. Setting to 0 means alarm
is shutted.
dELy : Delay time. It can be programmed between 0-9999 sec.
CAP :It shows step situation in alarm condition. Selecting on parameter
protects capacitor steps. Selecting oF parameter switches off capacitor
steps.
Ratio Protection Setup
Exceeding programmed inductive and capacitive ration in programmed
time which was set by user, device give alarm. It has 3 parameters.
ýnd : Ýnductive ratio can be set between 0-99.9 %. Setting to 0 means
alarm is shutted down.
CAP : Capacitive ratio can be programmed between 0-99.9 %. Setting
to 0 means alarm is shutted down.
HoUr : Programmed between 1-240 hours.
NOTE : Device shows ýnd and CAP ratios according to programmed
xxx hour, so user only can see parameters last xxx hours.
Over Heat Protection Setup
Exceeding programmed temperature value which was set by user, device
gives alarm after 10 sec. It has 3 parameters.
SP-H : Temperature alarm value can be set between 0-99.9 °C. Setting
to 0 means alarm is shutted down.
SP-L : Back to temperature alarm value can be set between 0-99.9 °C.
SP-H value must not be set as high value.
CAP : Determine the status of the alarm levels. Selecting on parameter
protects capacitor step condition, selecting oF parameter switch off
all capacitor steps.
This function is used for switching-on and switching-off the fan output
contact according to measured temperature. There are two submenu as
F-on and F-oF.
F-on : This is the assignment menu for programming the switch-on
temperature value. After a 10 sec. increasing of the high value of the
temperature, contact is going to switched-on and fan led light will be on.
Value can be defined between 00.0-99.8 °C. Function is going to be
disabled incase of setting as 00.0, F-oF value will be 00.0 automatically.
F-oF : This is the assignment menu for programming the switch-off
temperature value. Higher value of F-on can not be used.
Fan Relay Settings
Monitoring the measured temperature
In order make a correct measurement, device must keep worked at least 30 min. In
order to observing the measured environmental temperature, press UP/DOWN buttons
untill flashing C°/Alarm LED.
Related Alarm LED is on if any failure is occured for any reason. When
user request for monitoring the errors scrolling UP/DOWN buttons until
displaying the E-xx. This clause is not displayed if there is no error. All
the error codes are displayed respectively by pressing the SET button.
Example E-07 means over voltage condition error.
Displaying the Alarm Codes which are given by the device
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Voltage terminal connections may be wrong
Current transformer connections for phase 1 may be wrong or first capacitor step may be defected
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Excessive harmonic may be exist in the system
Voltage value of the system may be increased
Compensation Error
Compensation Error
Over Temperature
Defected capacitor step or variable loads
Target Cosjis capacitive even if all capacitor steps are switched off
Capacitor powers are not sufficient for target Cosj
3-Phase capacitor powers were not selected properly
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In the capacitor step measurement, 3-phase capacitor step is unbalanced or the fuse of any phase is blown
In the capacitor step measurement, 3-phase capacitor step is unbalanced or the fuse of any phase is blown
In the capacitor step measurement, 3-phase capacitor step is unbalanced or the fuse of any phase is blown
In the capacitor step measurement, 3-phase capacitor step is unbalanced or the fuse of any phase is blown
In the capacitor step measurement, 3-phase capacitor step is unbalanced or the fuse of any phase is blown
In the capacitor step measurement, 3-phase capacitor step is unbalanced or the fuse of any phase is blown
In the capacitor step measurement, 3-phase capacitor step is unbalanced or the fuse of any phase is blown
In the capacitor step measurement, 3-phase capacitor step is unbalanced or the fuse of any phase is blown