Mitsubishi Electric VAR-6A User manual

Be sure to forward the manual to the end user.
Before use, you should read this user’s manual carefully to
properly operate this device.
LZ311Z530H04
User’s Manual
MODEL
AUTOMATIC POWER FACTOR CONTROLLER
VAR-6A VAR-12A

2
Thank you for purchasing Automatic Power Factor Controller.
This instruction manual explains how to install and use Automatic Power Factor Controller
VAR series (hereinafter referred to as “device”).
Before use, you should read this user’s manual carefully to properly operate this device.
We recommend that you keep this manual in a safe place for future reference and read it
whenever necessary.
Be sure to forward the manual to the end user.
The following marks are used in this manual.
This symbol indicates matters that may lead to death or serious injury if
ignored or incorrectly handled.
This symbol indicates matters that may lead to injury or physical damage if
ignored or incorrectly handled.
This symbol indicates precautions to avoid any device failure or to operate
this device properly.
Introduction
Besides the main unit, the following accessories are packaged.
User’s Manual
(this document)
Embedded
Mounting
Fittings
Embedded
Fixing Screw
Parts name
2
2
(M3 mm × 14 mm)
Specifications
Quantity
1
A5 size (148 mm × 210 mm)
Check on your delivery
WARNING
CAUTION
NOTE
Even items described under [WARNING], [ CAUTION], or [ NOTE]may cause serious
results.
In any case, important information that must be observed is explained.
Mark Explanation

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Contents
Check on your delivery ............................................................................................................................. 2
Introduction ............................................................................................................................................... 2
Contents .................................................................................................................................................... 3
Safety Precautions ..................................................................................................................................... 4
1. Features ................................................................................................................................................. 9
2. Functions in each mode ........................................................................................................................ 9
3. Names and Function of Each Part ....................................................................................................... 10
4. Explanation of Control and Movement ............................................................................................... 14
4.1Details of Display of Power Factor Status and Auto/Manual Control Changeover ..................... 14
4.2Status of Power Factor .................................................................................................................. 14
4.3Auto/Manual Control Changeover ................................................................................................ 15
4.4Features of each Control ............................................................................................................... 16
4.5Cyclic Control Operation .............................................................................................................. 16
4.6Priority Control Operation ............................................................................................................ 17
4.7Optimal Control Operation ........................................................................................................... 18
4.8Capacitor Changing Control at Optimal Control Operation ......................................................... 19
4.9Light Load Disconnection Operation ............................................................................................ 20
4.10 Forced Disconnection Operation ................................................................................................ 21
5. Set-up
5.1Flow of Set-up (Measure Set-up Mode) ....................................................................................... 22
5.2Flow of Set-up (Control Set-up Mode) ......................................................................................... 24
5.3Measure Set-up Menu 1
(Set-up of Phase/Wire Type･Using VT/direct input･Primary Voltage･Primary Current) ............ 26
5.4Measure Set-up Menu 2(Set-up of Combination) ........................................................................ 29
5.5Control Set-up Menu 1(Set-up of Target Power Factor) ............................................................. 30
5.6Control Set-up Menu 2(Set-up of Light Load Power Ratio) ....................................................... 31
5.7Control Set-up Menu 3(Set-up of Delay Time) ........................................................................... 33
5.8Control Set-up Menu 4(Set-up of Control Method) .................................................................... 34
5.9Control Set-up Menu 5(Set-up of Capacity) ................................................................................ 35
5.10 TEST Menu (Operation Tests for the Connecting/Disconnecting) ............................................ 36
5.11 Set-up of Auto/Manual Control .................................................................................................. 37
5.12 Priority Order of Control ............................................................................................................ 37
6. Operation
6.1Changing of the Display ............................................................................................................... 38
6.2Changing of the Phase .................................................................................................................. 38
6.3Display of Capacity ...................................................................................................................... 39
6.4Reset of Capacity .......................................................................................................................... 39
7. Others
7.1Operation....................................................................................................................................... 40
7.2Troubleshooting ............................................................................................................................ 41
■After-sale service
1. Dimensions ......................................................................................................................................... 42
2. Attachment .......................................................................................................................................... 43
3. Wiring ................................................................................................................................................. 44
4. Wiring Diagram .................................................................................................................................. 46
Specifications .......................................................................................................................................... 49
Set-up Table ............................................................................................................................................ 50
Operation
Installation
Specifications

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■Working Environment and Working Condition
Avoid using this device in the following places. Use in the following places will negatively affect the device
lifetime and operations.
Do not;
●Place where the ambient temperature exceeds the temperature range (-5℃to +50 ℃).
●Place where the daily average temperature exceeds 35 ℃.
●Place where the ambient humidity exceeds the humidity range (30 % to 85 %).
●Place with a lot of dust,corrosive gas,salt or oily smoke.
●Place with a lot of vibrations or impacts.
●Place where the device may be exposed to rain or drops of water.
●Place exposed to the sun.
●Place where metal pieces and inductive substances are laying around.
●Place with strong electromagnetic field or much outside noise.
●Place higher than 1000 m above sea level.
●If you consider using this device for a special purpose,such as nuclear power plants,electric power
aerospace,medical care,passenger vehicles,or systems,consult with our sales representative.
■Cautionary Instructions for Installation and Connection
Read this Users Manual before using.
Safety Precautions
●To secure safety,the connecting work should be done by a person qualified
in performing electric wiring work.
●Do not perform hot line work. It can cause electrification,device failure or
fire.
●At the time of tightening screws and wiring,be careful about the invasions of
parings or the electric wire into the device.
●Perform connection after you fully check with the connection diagram.
Inappropriate connection can cause electrification,device failure or fire.
●Use electric wires which can comply with the rated current.
Using inappropriate wire can cause fire due to heat generation.
●At the time of the resisting pressure examination of the high voltage
apparatus,carry out grounding to avoid any negative influence.
The device can break down if more than 2000 V is impressed for 1minute.
CAUTION
terminal with less than 100 ohm of earth resistance. Otherwise there will
be a false operation.
●Always earth the terminal to the protective earth conductor. Earth the

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■Cautionary Instructions before Use
●Follow the environment and an operating condition in setting place.
●Make settings before use of this device. Read the User’s Manual in order to set it correctly.
Inappropriate settings can cause incorrect operation.
●After checking the power supply rating of this device,impress appropriate voltage. (Refer to page 49)
■Cautionary Instructions for Using
●We cannot take responsibility for the loss,lost profits,and the damage caused in special
circumstances. Moreover,we will not take responsibility to the second damage,accident
compensation,and the damage to any places other than our product.
●When blackout occurs during setting,it will not be set correctly. After the return of electricity,set it
again.
●Use solderless terminal that comply with the size of the electric wire. (Refer
to page 44) Using inappropriate terminals can cause malfunction,device
failure / burnout or fire.
●After tightening all the screws,be sure to confirm that all the screws are
tightened enough. Leaving any screws loose can cause malfunction,fire or
electrification.
●Tighten the screws to the appropriate torque. Tightening to the excessive
torque can cause terminal damage. (Refer to page 44)
●In order to prevent the invasion of noise,do not place power line and high
voltage line near the input and output signal line or put them together. Make
the following distance showed below when power line and high voltage
line are parallel to the input signal line.
●Do not drop this device from high places.
When the device is dropped,and a LCD is cracked,do not touch and drink
the liquid. If you touch the liquid,wash it away with soapy water promptly.
●Do not strongly pull the wire.
If terminal wire is pulled strongly,there is a possibility that an input-and-
output terminal can break away.
Condition
The power line is less than 600 V
Other power lines
Distance
More than 300 mm
More than 600 mm
CAUTION

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Safety Precautions
●Since this device is not equipped with protective functions against overcurrent,
overvoltage,ground faults,temperature,or pressure on capacitor,protected
circuits must be prepared separately.
CT
52C
3
DS
52C1
VMC
SR
DR
SC
VT
Wh W
Hz
V
COS A
〈Example〉
AU
（SC）
（DR）
U
The capacitor is protected by
tripping circuit breaker for 52C
or vacuum electromagnetic
contactor for 52C1 to 52C4 with
each protection relays and
disconnecting the capacitor from
the circuit.
52C2
VMC
SR
DR
SC
52C3
VMC
SR
DR
SC
52C4
VMC
SR
DR
SC
63C1 63C1 63C1 63C1
＊Type Designations of devices
by the Present Maker
VMC…VZ-E TYPE
SC……KL-8 TYPE
（capacitor）
SR……KR-3 TYPE
（series reactor）
VT Secondary Side 110 V AC
CT Secondary Side 5 A AC
Automatic Power Factor Controller
Connection Signal
VAR-6A
or
VAR-12A
Auxiliary Power supply
110 V AC 50 Hz/60 Hz
Over-voltage Relay
Capacitor
Control Circuit
Provides protection against
overvoltages on capacitors
since overvoltages will
shorten capacitor lifetimes
and lead to explosion of
capacitors in extreme cases.
Power Fuse
Provides protection against
overcurrent.
Connects or disconnects
the capacitor
Pressure Switch
Detects the expansion
of capacitor case
Vacuum Electromagnetic Contactor
High Voltage
Power Capacitor
Discharging Resistor
Discharges residual charge when
the capacitor is disconnected.
Discharges down to 50 V or less in
5 minutes.
(DR-Discharging Resistor)
・Has 6 % of a capacitor
・Impress transient phenomenon and
limits the fifth harmonic waves.
13 % series reactors are used when
voltage distortion exceeds 5.5 %.
Series Reactor (SR-Series Reactor)
When a discharging coil (DC-Discharging
Coil) is used, residual charge will be
discharged down to 5 V or less in 5 seconds
when the capacitor is disconnected.
Ground Relay
Overcurrent Relay
Ground Relay
Overvoltage Relay
Capacitor Pressure Switch
Series Reactor
Discharging Resistor
High Voltage Power Capacitor
63C
SR
DR
SC
●Install series reactor to the capacitor,which is to be automatically controlled
by this device.
●
●
●
Circuits set as  Manual ON  or  Manual OFF  will not connect/disconnect capacitor.
W
●
●When electric discharge coil is instituted,set Delay Time for 5minutes.
CAUTION
Ⅰ＞
Ⅰ＞
Ⅰ
Ⅰ
Ⅰ
＞
＞
＞
This device has a constant excitation system that outputs no voltage 1 a contact
that continuously keeps on when capacitor control signal is closed
, while the
contact becomes off when capacitor control signal is opened for each bank. One
side of the output signal of from C
1 to C 6 is COM 1 and the other side of the
output signal of from C
7 to C 12 is COM 2 . When connecting with the vacuum
electromagnetic contactor for disconnection and connection of capacitor
, be
sure to use auxiliary relay such as DC operated type (Model : SRD-T
5 ) or AC
operated type (Model : SR-T
5 ) manufactured by Mitsubishi Electric.
The maximum current must be under 1.5A on a common terminals.
In case of using by balanced load,connect at the diagram.

7
Safety
Precaution
●Setuptheapplicabledelaytimetothedischargedeviceofthecapacitor
(Dischargeresistance:over5minutes,Dischargecoil:over1minute),when
theconnection/disconnectiontestwiththehighvoltagecircuitiscarriedout.
Carryoutthetestwiththedelaytimesettobeshorterthanitshouldcan
causecapacitorfailureaccidents.
●Donotdismantleorremodelthisdevice.
Itcancausemalfunction,electrificationorfire.
WARNING
CAUTION

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■Cautionary Instructions for Maintenance and Inspection
●Wipe off surface with a soft cloth.
●Do not allow chemical cloth to contact for a long time or wipe with benzene,thinner or alcohol.
●For correct use of the device,perform the following inspection.
Enforce ④as a periodic inspection (every half year to 1year),and ①to ③as an everyday inspection.
Check to see:
①Any damage in the device?
②Any Error in the LCD?
③Any unusual sound or smell or fever?
④Any looseness in the installation or terminal block connection?
(Be sure to perform the inspection with the power off.)
■Storage Precautions
When storing the device,turn off auxiliary power and the power supply of input circuit,remove wiring,and
store it in a plastic bag etc. (Please take care of the removed wirings to prevent any accidents.)
Do not store the device for long time in places mentioned below. There is a risk of failure or
deterioration in service life.
Do not;
●Place where the ambient temperature exceeds the temperature range (-20 ℃to +60 ℃).
●Place where the daily average temperature exceeds 35 ℃.
●Place where the ambient humidity exceeds the humidity range (30 % to 85 %).
●Place with a lot of dust,corrosive gas,salt or oily smoke.
●Place with a lot of vibrations or impacts.
●Place where the device may be exposed to rain or drops of water.
●Place exposed to the sun.
●Place where metal pieces and inductive substances are laying around.
■Disposal
Dispose of this device according toThe law about abandonment and cleaning.●
●Batteries are not used in this device.
■About the Packing material and the User’s Manual
For environmental load reduction,
●Corrugated paper is used on packing material.
●Regenerated paper is used on Users Manual.
■Term of Guarantee
The period of guarantee is for one year from the purchase date.
Repair is onerous in case you break the device intentionally or by mistake even if it is during the guaranteed
period.
■Recommended renewal time
Exchange cycle will depend on status of use,however update should be carried out in every 10 years.
Safety Precautions

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Operation
This device controls input of capacitor automatically with primary voltage and measured primary
current.
■List of Model
VAR-6A
VAR-12A
Output Function
Capacitor Control Signal
Model
1. Features
There are following modes in this device.
Operation Mode
Measurement value is indicated with digital number.
The measurement values and capacity (of capacitors) are displayed on this Mode.
Measure Set-up Mode
Set-up of phase/wire type,primary voltage,and primary current are possible.
Set necessary items for operation.
In addition,it can carry out operation tests for connecting/disconnecting.
Control Set-up Mode
Set-up of target power factor,control method,and capacity are possible.
Set necessary items for operation.
■Flow of each mode
Measurement Display
Capacity Display
Operation Mode
Measure Set-up Menu 1
Measure Set-up Menu 2
TEST Menu
Control Set-up Menu 1
Control Set-up Menu 2
Control Set-up Menu 3
Control Set-up Menu 4
Control Set-up Menu 5
Control Set-up Mode
ENTER
＋
Press
simultaneously for 2 seconds
key
ENTER
Press key
ENTER
Press
Press
key
key
CAPACITY
SET CONT.
for 2 seconds
key
Measure Set-up Mode
2. Functions in each mode
Input Function
Forced Disconnection Signal
6circuits
12 circuits
1circuit
1circuit

10
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3. Names and Function of Each Part
■Name and Function of LCD / LED / Operation Key
・
yeK

RETNE

・
yeK
−
・
yeK
＋
・
yeK

YTICAPAC

・
yeK

.TNOCTES

・
yeK

ESAHP

・
yeK

YALPSID

yeknoitarepO ）tfelehtmorf（
pusthgilsDELfoenO
rotcafrewopehtnognidneped
s.utats
sutatSrotcaFrewoProfDEL
launam/citamotuaotsegnahC
.lortnoc
）3＊（ 
LAUNAM/OTUA“ ” yek ）to 61tiucriCroF（
DEL ）1tiucriCmorfstratstfelehT（
foputesehtsesaelerdnaskcoL
.lortnoclaunam/citamotua
）3＊（
ESAELER/KCOL“ ” yek ）to 61tiucriCroF（
decrofnehwpusthgiL
.tupnisilangisnoitcennocsid
）
evobaehtmorF
（
noitcennoCfosutatSrofDEL
ehterehwpusthgiltiucricehtnoDEL
.detcennocsiroticapac
lortnoCNOlaunaMrofDEL ）2＊（
ottessitiucricehtnehwpusthgiL
.lortnoCNOlaunam
lortnoCcitamotuArofDEL ）2＊（
ottessitiucricehtnehwpusthgiL
.lortnoccitamotua
lortnoCFFOlaunaMrofDEL ）2＊（
ehtottessitiucricehtnehwpust
hgiL
.lortnocFFOlaunaM
noitcennocsiDdecroFrofDEL
dnatnemerusaemsetacidnI
.eulavgnittes
DCL
A
6
-RAV
4C3C2C1C 5C 6C
RAV – A6
.rotcaFrewoPfosutatS
2
.
4
otreferesaelP
1＊
.sliatedrof)segap
41
(
lortnoClaunaM/otuA
3
.
4
otreferesaelP
2＊
.sliatedrof)segap
51
(revoegnahC
/otuAfopu-teS
11
.
5
otreferesaelP
3＊
.sliatedrof)segap
73
(lortnoClaunaM
TUODAEL
REPORP
TUOGAL
DAOLTHGIL
TROPXE
LOCK／RELEASE
LAUNAM／OTUA
MANUAL OFF
AUTO
MANUAL ON
YALPSID
ESAHP
SET CONT.
CAPACITY
＋ー
RETNE TESERCERUSAEMTES
CONTROL SETTING
EMITYALED
DECROF
NOITCENNOCSID
TARGET
POWER FACTOR
DAOLTHGIL
OITARREWOP
LORTNOC
DOHTEM
1 : CYCLIC 2 : PRIORITY 3 : OPTIMAL
）1＊（

11
DCL
A
21
-RAV
.lortnoclaunam/citamotuaotsegnahC
）2＊（
LAUNAM/OTUA“ ” yek ）21
7 to
tiucriCroF（
foputesehtsesaelerdnaskcoL
.lortnoclaunam/citamotua
）2＊（
ESAELER/KCOL“ ” yek ）21
7 to
tiucriCroF（
）
evobaehtmorF
（
noitcennoCfosutatSrofDEL
ehterehwpusthgiltiucricehtnoDEL
.detcennocsiroticapac
lortnoCNOlaunaMrofDEL ）1＊（
ottessitiucricehtnehwpusthgiL
.lortnoCNOlaunam
lortnoCcitamotuArofDEL ）1＊（
o
ttessitiucricehtnehwpusthgiL
.lortnoccitamotua
lortnoCFFOlaunaMrofDEL ）1＊（
ehtottessitiucricehtnehwpusthgiL
.lortnocFFOlaunaM
RAV – A21
4C3C2C1C 5C 6C
01C9C8C7C 21C11C
DEL ）7tiucriCmorfstratstfelehT（
lortnoClaunaM/otuA
3
.
4
otreferesaelP
1＊
.sliatedrof)segap
51
(revoegnahC
/otuAfopu-teS
11
.
5
otreferesaelP
2＊
.sliatedrof)segap
73
(lortnoClaunaM
.A
6
-RAVsaemasehterastraprehtO
3＊
TUODAEL
REPORP
TUOGAL
DAOLTHGIL
TROPXE
LOCK／RELEASE
LAUNAM／OTUA
LAUNAM／OTUA
LOCK／RELEASE
MANUAL OFF
AUTO
MANUAL ON
YALPSID
ESAHP
SET CONT.
CAPACITY
＋ー
RETNE TESERCERUSAEMTES
CONTROL SETTING
DECROF
NOITCENNOCSID
TARGET
POWER FACTOR
DAOLTHGIL
OITARREWOP
EMIT
YALED
LORTNOC
DOHTEM
1 : CYCLIC 2 : PRIORITY 3 : OPTIMAL
MANUAL OFF
AUTO
MANUAL ON

12
DCL
3. Names and Function of Each Part
aeht
,
erehnoitanalpxeehtrofylnosiyalpsidDCLsihtecniS* .evobaehtmorftnereffiderasyalpsidlautuc
■Functions of LCD
TES
DAEL
AW
M
M
retsaM evalS
DAELGAL
DAELGAL
nim
GAL
TSET MOC
k
v
a
r
k
.gnittesnoitanibmocnosnruT
sutatSevalS/retsaM
.tinutnemerusaemhcaesetacidnI
tinU
.eulavrotcafrewopsetacidnI
1yalpsiDlatigiD
.yticapacdnaseulavtnemerusaemsetacidnI
2yalpsiDlatigiD
tnerruchtiwdeyalpsidsiesahP
・
.egatlovdna
detacidnisirebmuNtiucriC
・
yticapacehthtiw .
sutatSrebmuNtiucriC/esahP
sdaelrotcafrewopnehW
,
nosnrutngis

DAEL
.
sgalrotcafrewopnehW
,
nosnrutngis

GAL
.
su
tatsGAL/DAEL
pu-teStanosnrutngis

TES

.edoM
sutatsedomPUT-ES
noitarepoehtgnirudpusthgilngis

TSET

gnitcennocsid/gnitcennocehtrofstset .
sutatSTSET
lortnocehtnodesab
,
rebmunpu-tesehtsetacidnI
.dohtem
lortnoCcilcyC
：1
lortnoCytiroirP
：2
lortnoClamitpO
：3
dohteMlortnoC
.emityaledehtsetacidnI
emiTyaleD
.oitarrewopdaolthgilehtsetacidnI
oitaRrewoPdaoLthgiL
.rotcafrewoptegratehts
etacidnI
rotcaFtegraT

13
DCL
C5
COM1
COM1
NC
NC
1S
1L
2S
2L
3S
3L
C3
M B
M
A
C1
3P4W3P3W
CE+
TE+
E-
CS+
TS+
TA/S-
TB
COM1
COM1
C6
C4
C2
P2
P3
P0
P1
P3
P2
P1
NC
NC
1S
1L
2S
2L
3S
3L
M
B
M
A
3P4W3P3W
CE+
TE+
E-
CS+
TS+
TA/S-
TB
P2
P3
P0
P1
P3
P2
P1
C5
COM1
COM1
C3
C1
COM1
COM1
C6
C4
C2
C11
COM2
COM2
C9
C7
COM2
COM2
C12
C10
C8
VAR-6AVAR-12A
■A Name and the Work of Terminal.
Auxiliary Power
Terminal
Earthing Terminal
Non-connection
Terminal
Current Input
Terminal
Connection
Disable /
Disconnection
Disable Input
Terminal
Forced
Disconnection
Signal Input
Terminal
Connecting
Completion /
Disconnecting
Completion Output
Terminal
Voltage Input
Terminal
Control Signal
Output Terminal
Terminal NumberTerminal Name Detailed Explanation
MA,MB
NC
1 S , 1 L , 2 S , 2 L , 3 S , 3 L
CS+,TS+,TA/S-
TA/S-,TB
CE+,TE+,E-
P0, P1, P2, P3
C1to C6, COM1
C7to C12, COM2
Terminals for inputting auxiliary power for this device.
Terminal for earthing.
They are not in use.
Please do not connect.
Terminals for inputting
the current (CT secondary signal) to the
measurement circuit.
Connection disable input terminal: CS+
Disconnection disable input terminal: TS+
Disable signal: TA/S-
Terminals for inputting the connection disable signal to disable
the connection operation.
Terminals for disconnection disable signal to disable the
disconnection operation.
Terminals for inputting the signal for forced disconnection of
capacitor circuits that are closed by automatic control.
Connecting completion output terminal: CE+
Disconnecting completion output terminal: TE+
Completion signal common: E-
Terminals for outputting connecting completion signal when
all the capacitors are connected and disconnecting completion
signal when all the capacitors are disconnected.
Terminals for inputting the voltage (VT secondary signal) to
the measurement circuit. Direct connections can be made in
the case of 220 V and 110 V circuit.
In 33W,do not connect to P2terminal for 34W.
Terminals for connecting the signal circuit for capacitor
Connection/Disconnection.

14
lortnoC
4. Explanation of Control and Movement
■Status Indication of Power Factor
LEAD OUT△： This LED will light up on when Power Factor enters a Lead Out Area.
PROPER□ ： This LED will light up on when Power Factor enters a Proper Area.
LAG OUT▽ ： This LED will light up on when Power Factor enters a Lag Out Area
(Power Factor is less than Target Power Factor).
LIGHT LOAD ： This LED will light up on when Power Factor enters a Light Load Disconnection Area.
EXPORT◇ ： This LED will light up on when Power Factor enters a EXPORT Area (power transmission).
FORCED DISCONNECTION○：
This LED will light up on when the forced disconnection signal is inputted.
4.2 Status of Power Factor
＊The display changes based on the moving average deviations within 16 seconds.
・The Connection Level is the target power factor value.
・The Disconnection Level is defined as:
(Connection Level) - (capacity to be disconnected) ×1.2
・The light load disconnection level is a value calculated as:
α×(primary voltage setting value)×(primary current setting value)×(Light Load Power Ratio)
33W：α＝√
34W：α＝3
EXPORT
LEAD OUT
LEAD
LAG
Disconnection Level
Active Power
LAG OUT
Light Load Disconnection Level
Connection Level
PROPER
Reactive Power
LIGHT LOAD
△
Details of Display of Power Factor Status and Auto/Manual Control Changeover is shown below.
4.1 Details of Display of Power Factor Status and Auto/Manual Control Changeover
C1 C2 C3 C4 5C 6C
LOCK／RELEASE
AUTO／MANUAL
LEAD OUT
PROPER
LAG OUT
LIGHT LOAD
EXPORT
MANUAL ON
MANUAL OFF
AUTO
C7 C8 C9 C10 C12C11
LOCK／RELEASE
AUTO／MANUAL
MANUAL ON
MANUAL OFF
AUTO
FORCED
DISCONNECTION
“LOCK/RELEASE” Key
“FORCED DISCONNECTION” LED
“EXPORT” LED
“LIGHT LOAD” LED
“LAG OUT” LED
“PROPER” LED
“LEAD OUT” LED
“AUTO/MANUAL” Key
LED for Manual OFF Control
LED for Automatic Control
LED for Status of Connection
LED for Manual ON Control
3
333W：α＝ √

15
Control
Acontrolset-upispossibleamongManualON,ManualOFF,andAutooneachcapacitor
bank.
Referto5.11Set-upofAuto/ManualControl(page37)forthesettingmethod.
(a)ManualONset-up
ManualONset-up(LEDforManualONcontrollightsup)isdonebypressingAUTO/
MANUALKey,andthecontrolsignalforeachcapacitorwillcloseaftertheDelayTimepasses,
regardlessoftheinputconditions.
(b)AUTOset-up
AUTOset-up(LEDforAUTOcontrollightsup)isdonebypressingAUTO/MANUAL
Key,andautomaticcontrolwillstart.
Ifreactivepowerincreases,LAGOUTLEDlightsup,andthecontrolsignalofcapacitorwill
closeaftertheDelayTimepasses.
Ifreactivepowerdecreases,LEADOUTLEDlightsup,andthecontrolsignalofcapacitorwill
openaftertheDelayTimepasses.
(c)ManualOFFset-up
ManualOFFset-up(LEDforManualOFFcontrollightsup)isdonebypressingAUTO/
MANUALKey,andthecontrolsignalofcapacitorwillcloseforeachcapacitorimmediately,
regardlessoftheinputconditions.
＊1. TheAuto/Manualchangeoveriseffectivefromtheinstantitisoperated;Thereisno
necessaryforrestartingthedeviceaftersetting.
＊2. TheManualONandManualOFFoperationiseffectiveeveniftheconnectiondisable
signalorthedisconnectiondisablesignalisinputted.
＊3. AfterchangingthesettingfromManualOFFtoAuto,thegenerationofthecapacitor
connectionsignalwillnotbeginuntiltheDelayTimepasses.
＊4. PleasesettoManualOFFforbanksthatarenotconnectedtocapacitors.
4.3Auto/ManualControlChangeover

16
Control
4.ExplanationofControlandMovement
■ Inthecycliccontrol,thenumberofthe
switchingoperationofeachcapacitor
circuitaremadeequally.
■ Atthetimeofturningonthepower
supply,theconnectionbeginswithC1
andproceedsasfollows:

C1→C2→C3→C4→C5→C6
Itoperatesasfollowsinthecaseof12
circuits.

C1→C2→ ……… →C11→C12
■ ThedisconnectionalsobeginswithC1
atthetimeofturningonthepower
supplyandproceedsinthesame
mannerastheconnection:

C1→C2→C3→C4→C5→C6
Itoperatesasfollowsatthetimeof12circuits.

C1→C2→ ……… →C11→C12
■ Thecycliccontrolissuitableforcontrollingcapacitorswithequivalentcapacity.Sincethe
switchingoperationofthevacuumelectromagneticcontactorsaremadeequally,longlifetime
canbeexpected.Itisnecessarytoreplaceallthecontactorsatthesametime.
■ WhenCombinationON/OFFset-upisON,acontrolmethodservesasonlycycliccontrol.
4.5CyclicControlOperation
CyclicControlOpration
thenumberof
connectionbanks
Statusof
connection/disconnection
increase
LoadChange
decrease
decrease
decrease
increase increase
Thefeaturesofeachcontrolisshownbelow.
4.4FeaturesofeachControl
Cycliccontrol
Prioritycontrol
Optimalcontrol
Controlname Feature
Thecycliccontrolissuitableforcontrollingcapacitorswithequivalentcapacity.Since
thenumberoftheswitchingoperationofthevacuumelectromagneticcontactorsare
madeequally,longlifetimecanbeexpected.Itisnecessarytoreplaceallthecontactors
atthesametime.
Theprioritycontrolissuitableforcontrollingthedifferent-capacitycapacitorgroupin
stableloadcircuitwhichusethelarge-capacitycapacitoronbaseandadjustschanges
ofreactivepoweronthesmall-capacitycapacitors.Butsincetheswitchingofcertain
vacuumelectromagneticcontactorswillbecomemorefrequentthanthoseofothers,
maintenanceandinspectionsmustbemadefrequentlyandeachcontactormustbe
replacedattheendoftheirrespectivelifetime.
Theoptimalcontrolissuitableforcontrollingthedifferent-capacitycapacitorgroups
inthecircuitwhereloadfluctuationisfrequent.Butsincetheswitchingofvacuum
electromagneticcontactorsbecomefrequentandnotequal,themaintenanceand
inspectionsmustbeperformedfrequentlyandeachcontactormustbereplacedatthe
endoftheirrespectivelifetime.

17
Control
■ Intheprioritycontrolmethod,priorities
areattachedtotheconnectionand
disconnectionofeachcapacitor.
■ Uponturningonthepowersupply,the
connectionsequencebeginswithC1
andproceedsasfollows:
C1→C2→C3→C4→C5→C6
Itoperatesasfollowsatthetimeof12
circuits.
C1→C2→………→C11→C12
■ Inthe disconnection sequence,
disconnectionproceedssequentially,
startingfromthelastcapacitorcircuit
thatwasclosed.Inotherwords,it
proceedsinthereverseorderofthe
connectionsequence.
C1←C2←C3←C4←C5←C6
Itoperatesasfollowsatthetimeof12
circuits.
C1←C2←………←C11←C12
■ Theprioritycontrolissuitablefor
controllingthedifferent-capacity
capacitorgroupinstableloadcircuit
whichusethelarge-capacitycapacitor
onbaseandadjustschangesofreactive
poweronthesmall-capacitycapacitors.
Butsincetheswitchingofcertain
vacuumelectromagneticcontactorswill
becomemorefrequentthanthoseof
others,maintenanceandinspections
mustbemadefrequentlyandeach
contactormustbereplacedattheend
oftheirrespectivelifetime.
■ Prioritycontrolcannotbeperformed
whenCombinationON/OFFset-up
isON.Controlmethodservesas
onlycycliccontrol.
4.6PriorityControlOperation
PriorityControlOpration
LoadChange
thenumberof
connectionbanks
Statusof
connection/disconnection
increase decrease
decrease
decrease
increase increase

18
lortnoC
4.7 Optimal Control Operation
■In the optimal control,connection and
disconnection is selectively performed
for one capacitor circuit with the most
appropriate capacity that will keep the
lagging reactive power within the
target power factor.
■In the connection,capacitors are cut
off sequentially in order t o
decrease capacity until the power
factor becomes the closest to the
target power factor and the lag is
minimized at the same time.
■Capacitors are cut off sequentially in
order to decrease capacity until the
power factor becomes the closest to
the target power factor but it is never
below the target power factor.
■The optimal control is suitable for
controlling the different - capacity
capacitor groups in the circuit where load
fluctuation is frequent. But since the
switching of vacuum electromagnetic
contactors become frequent and not
equal,the maintenance and inspections
must be performed frequently and each
contactor must be replaced at the end of
their respective lifetime.
■At the time of turning on the power
supply,the device first operates in the
cyclic control mode until all capacitors
C1to C6(It is C1to C12 at the time of
12 circuits.) are closed. The device then
begins the optimal control operations.
sipu-tes
dloH/otuAyticapaCnehW■
onHoldset-up and each capacity is
the same,it becomes cyclic operation.
■The optimal control is not possible
FFO/NOnoitanibmoCehtnehw
sevresdohtemlortnoC
.NOsipu-tes
as only cyclic control.
Optimal Control Opration
Lagging
Reactive Power
Time
Total Connection
Capacity
Status of
connection/disconnection
90 240
990
410
110 790 210
1190
4. Explanation of Control and Movement

19
lortnoC
■Optimal control is suitable for circuits with sharp load fluctuation. However,in case the load
decreases gradually when multiple capacitors are closed,capacitors will open from the smallest
capacity,and the capacitor with the largest capacity will remain last.
■In the area where light load disconnection is not made,the disconnection level is determined by
the capacity. Thus this last capacitor will not be cut off.
■When the power factor leads out further than 95 % (Changing Area) in this status,changing
control takes place where large capacity capacitor opens and small capacity capacitor closes.
4.8 Capacitor Changing Control at Optimal Control Operation
Setting value of Target Power Factor is not 100 %.
Changing Area
EXPORT
LEAD OUT
PROPER
LAG OUT
Light Load Disconnection Level
Disconnection Level
LEAD 95 % Level
Active Power
Connection Level
Reactive Power
LIGHT LOAD
LEAD
LAG
Setting value of Target Power Factor is 100 %.
Changing Area
EXPORT
LEAD OUT
LAG OUT
PROPER
Light Load Disconnection Level
Disconnection Level
LEAD 95 % Level
Active Power
Connection Level
Reactive Power
LIGHT LOAD
LEAD
LAG

20
Control
4.9LightLoadDisconnectionOperation
4. ExplanationofControlandMovement
■ Inordertopreventoverloadingunderlightloadconditions,theclosedcapacitorsaresequentiallycut
offwhentheloadfallsbelowthepowervaluedeterminedfromthelowloadpowerratiosettingvalue.
(Pleaserefertopage32aboutthecalculationformulaofthelightloadpowerratio.)
■ WhentheactivepowerdecreasesandtheLIGHTLOADLEDlightsupandthiscondition
continuesfortheDelayTime,onecapacitorcircuitiscutoff.Thereafter,onecapacitorcircuitis
cutoffeachtimetheDelayTimepassesaslongastheLIGHTLOADLEDlightsup.
■ WhenEXPORTLEDlightsup,thesameoperationasthecasewhenLIGHTLOADLEDlights
upiscarriedout.
■ Theorderofdisconnectingcapacitorisasfollow:
① Incycliccontrol,capacitorcircuitsareturnedOFF.Thisstartsfromthefirstcapacitorcircuit
wheretheconnectionsignalisoutputted.(Disconnectionproceedsinthesameorderas
connection.)
② Inprioritycontrol,capacitorcircuitsareturnedOFF.Thisstartsfromthelastcapacitor
circuitwheretheconnectionsignalisoutputted.(Disconnectionproceedsinthereverse
orderofconnection.)
③ Inoptimalcontrol,capacitorcircuitsareturnedOFFinorderoftheoutputterminalnumber.
Thisstartsfromthelowestterminalnumber.
EXPORT
LEADOUT
PROPER
LAGOUT
LightLoadDisconnectionLevel
DisconnectionLevel
ActivePower
ConnectionLevel
ReactivePower
LIGHTLOAD
LEAD
LAG