-
3
RKC INSTRUMENT INC.
®
Three-phase Thyristor Unit
400 V AC Type
THW
Instruction Manual
IMR01V02-E1
Company names and product names used in this manual are the trademarks or registered trademarks of
the respective companies.
All Rights Reserved, Copyright 2005, RKC INSTRUMENT INC.
t
Thank you for purchasing this RKC instrument. In order to achieve maximum performance and ensure
proper operation of your new instrument, carefully read all the instructions in this manual. Please
place this manual in a convenient location for easy reference.
SYMBOLS
WARNING
CAUTION
!
An external protection device must be installed if failure of this instrument
could result in damage to the instrument, equipment or injury to personnel.
: This mark indicates precautions that must be taken if there is danger of electric
shock, fire, etc., which could result in loss of life or injury.
: This mark indicates that if these precautions and operating procedures are no
taken, damage to the instrument may result.
: This mark indicates that all precautions should be taken for safe usage.
: This mark indicates important information on installation, handling and operating
procedures.
: This mark indicates supplemental information on installation, handling and
operating procedures.
: This mark indicates where additional information may be located.
WARNING
!
All wiring must be completed before power is turned on to prevent electric
shock, fire or damage to instrument and equipment.
This instrument must be used in accordance with the specifications to
prevent fire or damage to instrument and equipment.
This instrument is not intended for use in locations subject to flammable or
explosive gases.
Do not touch the high-voltage sections such as power supply terminals,
power supply lines and input/output terminals. If touched, electric shock or
injury may result.
Do not enter the hand into the opening of this instrument. If entered, electric
shock or injury may result.
RKC is not responsible if this instrument is repaired, modified or
disassembled by other than factory-approved personnel. Malfunction can
occur and warranty is void under these conditions.
IMR01V02-E1
i-1
CAUTION
This is a Class A instrument. In a domestic environment, this instrument may cause radio
interference, in which case the user may be required to take adequate measures.
This instrument is protected from electric shock by reinforced insulation. Provide
reinforced insulation between the wire for the input signal and the wires for instrument
power supply, source of power and loads.
Be sure to provide an appropriate surge control circuit respectively for the following:
- If input/output or signal lines within the building are longer than 30 meters.
- If input/output or signal lines leave the building, regardless the length.
This instrument is manufactured on the assumption that it is mounted within a control
panel. All high-voltage connections such as power supply terminals must be enclosed in
the control panel to avoid electric shock by operating personnel.
All precautions described in this manual should be taken to avoid damage to the
instrument or equipment.
All wiring must be in accordance with local codes and regulations.
Always use this product at the rated power supply voltage, load current and power
frequency.
All wiring must be completed before power is turned on to prevent electric shock,
instrument failure, or incorrect action.
To prevent instrument damage or failure, protect the power line and the input/output lines
with a protection device such as fuse, etc.
If this product is used for phase control, higher harmonic noise may be generated.
Therefore in this case, take such measures as installing an isolation transformer and
separating the power line from the high-voltage line for load drive.
Prevent metal fragments or lead wire scraps from falling inside instrument case to avoid
electric shock, fire or malfunction.
Tighten each terminal screw to the specified torque found in the manual to avoid electric
shock, fire or malfunction.
For proper operation of this instrument, provide adequate ventilation for heat dispensation.
Do not connect wires to unused terminals as this will interfere with proper operation of the
instrument.
Turn off the power supply before cleaning the instrument.
Do not use a volatile solvent such as paint thinner to clean the instrument. Deformation or
discoloration will occur. Use a soft, dry cloth to remove stains from the instrument.
To avoid damage to instrument display, do not rub with an abrasive material or push front
panel with a hard object.
NOTICE
This manual assumes that the reader has a fundamental knowledge of the principles of electricity,
process control, computer technology and communications.
The figures, diagrams and numeric values used in this manual are only for purpose of illustration.
RKC is not responsible for any damage or injury that is caused as a result of using this instrument,
instrument failure or indirect damage.
RKC is not responsible for any damage and/or injury resulting from the use of instruments made by
imitating this instrument.
Periodic maintenance is required for safe and proper operation of this instrument. Some
components have a limited service life, or characteristics that change over time.
Every effort has been made to ensure accuracy of all information contained herein. RKC makes no
warranty expressed or implied, with respect to the accuracy of the information. The information in
this manual is subject to change without prior notice.
No portion of this document may be reprinted, modified, copied, transmitted, digitized, stored,
processed or retrieved through any mechanical, electronic, optical or other means without prior
written approval from RKC.
i-2
IMR01V02-E1
CONTENTS
1. OUTLINE .............................................................................. 1
1.1 Checking the Product ......................................................................................2
1.2 Parts Description ............................................................................................. 4
2. MOUNTING ........................................................................... 6
2.1 Mounting Environment.....................................................................................6
2.2 Mounting Cautions...........................................................................................7
2.3 Dimensions......................................................................................................8
2.4 Mounting Procedures ....................................................................................11
Page
3. WIRING ............................................................................... 12
3.1 Circuit Block Diagram ....................................................................................12
3.2 Wiring of Main Circuit ....................................................................................13
3.3 Wiring of the Step-Down Transformer ...........................................................15
3.4 Wiring of Controller (Auto Mode) ................................................................... 16
3.4.1 Wiring of the current input ..................................................................................17
3.4.2 Wiring of the voltage input or voltage pulse input ..............................................17
3.4.3 Wiring of the series connection (For current input) ............................................ 18
3.4.4 Wiring of the parallel connection (For voltage input or voltage pulse input)....... 18
3.5 Wiring for Input/Output Connector .................................................................19
3.5.1 Input/output connector pin number and details ..................................................19
3.5.2 Caution for wiring input/output connector (plug) ................................................20
3.5.3 Wiring of external manual setter ........................................................................20
3.5.4 Wiring of external gradient setter ....................................................................... 20
3.5.5 Wiring of external contact input.......................................................................... 21
3.5.6 Wiring of Auto mode (with gradient setter)......................................................... 21
3.5.7 Wiring of Auto/Manual mode selection............................................................... 22
3.5.8 Wiring of Auto/Manual mode selection (with gradient setter)............................. 22
3.5.9 Wiring of alarm output ........................................................................................ 23
3.5.10 Wiring of contact input...................................................................................... 23
3.5.11 Wiring of ON/OFF control................................................................................. 24
IMR01V02-E1 i-3
4. SETTING ............................................................................. 25
4.1 Mode Menu....................................................................................................25
4.2 Monitor Mode 1..............................................................................................27
4.2.1 Display sequence............................................................................................... 27
4.2.2 Description of each monitor item........................................................................ 28
(1) Input signal monitor 1 (InS1)............................................................................ 28
(2) Phase angle ratio monitor (PHAr).................................................................... 30
(3) Current value monitor (CT) .............................................................................. 30
(4) Voltage value monitor (Vo) .............................................................................. 30
(5) Power value monitor (PoW)............................................................................. 30
4.3 Monitor Mode 2..............................................................................................31
4.3.1 Display sequence............................................................................................... 31
4.3.2 Description of each monitor item........................................................................ 32
(1) Power frequency monitor (IFrq) ....................................................................... 32
(2) Input signal monitor 2 (InS2)............................................................................ 32
(3) External gradient set value monitor (EGr) .......................................................32
(4) External manual set value monitor (EMAn) ..................................................... 32
(5) Contact input state monitor (dIST)................................................................... 32
Page
4.4 Setting Mode .................................................................................................33
4.4.1 Display sequence............................................................................................... 33
4.4.2 Changing parameter settings ............................................................................. 34
4.4.3 Description of each parameter ........................................................................... 36
(1) Internal manual set value (IMAn)..................................................................... 36
(2) Internal gradient set value (IGr) ....................................................................... 36
(3) Soft-start time (SoFS) ...................................................................................... 36
(4) Soft-down time (SoFd)..................................................................................... 36
(5) Maximum load current set value for alarm (MAXC)......................................... 37
(6) Heater break alarm 1 set value setting (HbA1)................................................ 37
(7) Thyristor break-down set value setting (THb).................................................. 38
(8) Heater break alarm 2 set value setting (HbA2)................................................ 38
(9) Current limiter value setting (CT)..................................................................... 39
(10) Set data lock setting (LCK) ............................................................................39
4.5 Engineering Mode .........................................................................................40
4.5.1 Transfer to engineering mode ............................................................................ 40
4.5.2 Display sequence............................................................................................... 42
i-4
IMR01V02-E1
Page
4.5.3 Description of each parameter ........................................................................... 43
(1) Function block 24 (F24.) .................................................................................. 43
Contact input action (dISL)............................................................................. 43
(2) Function block 30 (F30.) .................................................................................. 43
Output mode for phase control (oS)............................................................... 43
Alarm 1 output logic (LGA1), Alarm 2 output logic (LGA2)............................. 44
(3) Function block 45 (F45.) .................................................................................. 44
Number of heater break alarm 1 delay times (HbC1) .................................... 44
Heater break alarm 1 type (AS1) ................................................................... 45
Alarm interlock (ILS)....................................................................................... 45
(4) Function block 46 (F46.) .................................................................................. 45
Number of heater break alarm 2 delay times (HbC2) .................................... 45
Heater break alarm 2 type (AS2) ................................................................... 45
(5) Function block 51 (F51.) .................................................................................. 46
Control method (ConT) .................................................................................. 46
RUN/STOP action (rSA)................................................................................. 46
Input signal (InSS).......................................................................................... 46
(6) Function block 52 (F52.) .................................................................................. 47
Output limiter (high) (oLH).............................................................................. 47
Output limiter (low) (oLL)................................................................................ 47
Output limiter (high) at operation start (SoLH) ............................................... 47
Output limiter (high) time at operation start (SoLT)........................................ 47
Base-up set value (bAUP).............................................................................. 47
(7) Function block 60 (F60.) .................................................................................. 48
(8) Function block 91 (F91.) .................................................................................. 48
ROM version .................................................................................................. 48
Integrated operating time [upper 2 digits] (WTH) ........................................... 48
Integrated operating time [lower 4 digits] (WTL) ............................................ 48
5. FUNCTIONS........................................................................ 49
5.1 Control Method ..............................................................................................49
5.2 Ramp Function (Soft-Start/Soft-Down Function) ...........................................49
5.3 Gradient Setting Function.............................................................................. 50
5.4 Output Limiter (High and Low).......................................................................50
5.5 Output Limiter (High) at Operation Start ........................................................51
5.6 Base-Up Setting Function.............................................................................. 52
5.7 Output Mode for Phase Control .....................................................................53
IMR01V02-E1
i-5
Page
5.8 Current Limiter Function ................................................................................56
5.9 Automatic Power Frequency Detection
and Power Frequency Monitoring Function ................................................... 56
5.10 Alarm Interlock Function.............................................................................. 57
5.11 Heater Break Alarm 1 (HBA1), Heater Break Alarm 2 (HBA2)
and Thyristor Break-Down Alarm.................................................................57
5.11.1 Number of alarm delay times ........................................................................... 57
5.11.2 Heater break alarm for phase control (Type 1) ................................................ 58
5.11.3 Heater break alarm for phase control (Type 2) ................................................ 64
5.11.4 Heater break alarm for zero-cross control........................................................ 65
5.12 FAIL Alarm...................................................................................................68
5.13 Negative Phase Sequence Alarm................................................................68
5.14 Over Current Alarm (optional)......................................................................68
5.15 Fuse Break Alarm (optional) ........................................................................68
5.16 Set Data Lock Function ...............................................................................68
5.17 External Contact Input (DI) Function ...........................................................69
6. MAINTENANCE .................................................................. 70
6.1 Daily Inspection .............................................................................................70
6.2 Troubleshooting.............................................................................................71
6.3 Replacement of the Fast-Blow Fuse.............................................................. 72
6.3.1 Replacement of the fast-blow fuse (without microswitch) .................................. 72
6.3.2 Replacement of the fast-blow fuse (with microswitch) ....................................... 75
7. SPECIFICATIONS .............................................................. 77
APPENDIX .............................................................................. 81
How to fix the terminal cover (optional).......................................................... 81
Description of terms ....................................................................................... 82
Character symbols ......................................................................................... 82
i-6
IMR01V02-E1
A
A
A
1. OUTLINE
This instrument is a three-phase thyristor unit for power supply voltage 400 V AC.
It is possible to adjust power supplied to heaters, etc. by setting the signal from the controller, setter
(potentiometer) or front keys.
Gradient setter
Manual setter
Switch, etc.
Alarmer, etc
External gradient setting
External manual mode
External contact input:
uto mode/Manual mode,
RUN/STOP,
larm interlock release
larm output:
Heater break, Thyristor break-down,
etc.
Step-down
transformer
(Heater, etc)
Three-phase power supply
THW-3
Load
Front keys
Internal manual mode,
Internal gradient setting,
Alarm setting, etc.
Controller
Auto mode
The rated currents of six types are available.
Power supply voltage
Rated current
20 A 30 A 45 A 60 A 80 A 100 A
400 V AC
The input signal and set value can be checked on the display unit.
The display unit can check the input signal, phase angle, power frequency, current and set value of
each parameter, etc.
The front keys can set the gradient setting and manual setting.
In addition to the setting by an ordinary setter (potentiometer), it is possible to set internal gradient
setting and internal manual setting values by the front keys while checking these numeric values
shown on the display unit.
Automatic power frequency detection
The instrument automatically detects a power supply frequency (50/60 Hz) when the power is turned
on.
The control of three types can be selected.
It is possible to select by the front keys and then use any one of phase control, zero-cross control
(continuous) and zero-cross control (input synchronous type).
IMR01V02-E1 1
1. OUTLINE
*
1.1 Checking the Product
Before using this product, check each of the following:
• Model code
• Check that there are no scratch or breakage in external appearance (case, heat radiation fin, front
panel, or terminal, etc).
• Check that all of the items delivered are complete. (See below)
THW - 3 4 PZ - ∗
(1) (2) (3) (4) (5) (6) (7) (8)
-
*
The code shown in (8) is printed on the nameplate when the relevant accessory is specified as an option.
(1) Power supply
4: Three-phase 400 to 440 V AC
(2) Control method
PZ: Phase control/Zero-cross control (configurable)
(3) Rated current
020: 20 A 060: 60 A
030: 30 A 080: 80 A
045: 45 A 100: 100 A
(4) Input signal
4: Voltage input 0 to 5 V DC 7: Current input 0 to 20 mA DC
5: Voltage input 0 to 10 V DC 8: Current input 4 to 20 mA DC
6: Voltage input 1 to 5 V DC
(5) Output mode
N: Standard (Proportional phase angle to input, Proportional voltage to input, Proportional square
voltage (electric power) to input)
6: Standard and Constant voltage control (No heater break alarm)
V: Standard and Constant voltage control (With heater break alarm and current limiter function *)
E: Standard and Constant current control (With heater break alarm and current limiter function *)
W: Standard and Constant power control (With heater break alarm and current limiter function *)
* When the Heater break alarm and Current limiter are provided, the Over current and Thyristor break-down
alarm are available.
2
IMR01V02-E1
(6) Fuse
N: No fast-blow fuse is provided
F: Built-in fast-blow fuse
S: Built-in fast-blow fuse (With microswitch)
(7) Option function
N: No function
(8) Accessories
1: Setter (potentiometer, knob and scale plate) [1 set] and Input/Output connector (plug)
2: Setter (potentiometer, knob and scale plate) [2 set] and Input/Output connector (plug)
9: Input/Output connector (plug)
A: Terminal cover
Accessories (Order Separately)
1. OUTLINE
THVP-S01: Setter (potentiometer, knob and scale plate)
THWP-C01: Input/Output connector (plug)
THWP-T01: Step-down transformer (for instrument power supply)
THWP-F22: Fast-blow fuse for 20 A
THWP-F32: Fast-blow fuse for 30 A
THWP-F42: Fast-blow fuse for 45 A and 60 A
THWP-F82: Fast-blow fuse for 80 A
THWP-FA2: Fast-blow fuse for 100 A
THWP-F23: Fast-blow fuse for 20 A (With microswitch)
THWP-F33: Fast-blow fuse for 30 A (With microswitch)
THWP-F43: Fast-blow fuse for 45 A and 60 A (With microswitch)
THWP-F83: Fast-blow fuse for 80 A (With microswitch)
THWP-FA3: Fast-blow fuse for 100 A (With microswitch)
THWP-A02: Terminal cover for 20 A, 30 A, 45 A and 60 A
THWP-A03: Terminal cover for 80 A and 100 A
The accessories attached to product
Instruction Manual (IMR01V02-E1)................................................................... 1
Short bar (The short bar is connected to the “input terminals.”)......................... 1
Step-down transformer (for instrument power supply: THWP-T01).................. 1
If any of the products are missing, damaged, or if your manual is incomplete, please contact
RKC sales office or the agent.
IMR01V02-E1
3
1. OUTLINE
1.2 Parts Description
(1) Main circuit terminals (power supply side)
(13) Power
terminals
(2) Power lamp
(3) Display
(4) SET key
(5) Shift key
(6) DOWN key
(7) UP key
(12) Input/output
connector
(8) Indication
lamps
(9) Input terminals
(10) Grounding
terminal
(11) Main circuit terminals (load side)
The name is the same as for each type (20 to 100 A).
No. Name Description No. Name Description
(1) Main circuit terminals
(power supply side)
(1/L1, 3/L2, 5/L3)
(2) Power lamp (green) Lit when the power is turned
(3) Display • Display (upper):
• Display (lower):
(4)
(5)
• Shift digits when settings
(6)
(7)
(SET key)
(Shift key)
(DOWN key)
(UP key)
Used to connect three-phase
power supply.
on.
Display the parameters
symbols and numeric value.
Display the input signal value
and each set value.
Used for parameter calling up
and set value registration.
• Used to select the mode. (12) Input/Output
are changed.
• Used to select the monitor
item and function block
(F).
• Decrease numerals.
• Used to select the monitor
item and function block
(F).
• Increase numerals.
(8) Indication lamps
(red)
(9) Input terminals Used to connect input signal
(10) Grounding terminal Used to connect the
(11) Main circuit terminals
(load side)
(2/T1, 4/T2, 6/T3)
connector (socket)
[Optional] contact or controller.
(13) Power terminals
(7/l1, 8/l2, 9/l3)
Lights when any error occurs.
For details, see the Description
of Indication lamp (P. 5).
wires (controller, etc.).
grounding terminal.
Used to connect the load.
Used to connect with a setter
(potentiometer), external
In addition, used to alarm
output.
Used to connect the power
supply of THW-3.
4
IMR01V02-E1
Description of indication lamp
If an error occurs, the indication lamp lights.
INDICATION LAMP
FAIL
FREQ
PHASE
HBA1
THY.B
HBA2
OCR
FUSE
1. OUTLINE
THW-3
The name is the same as for each type (20 to 100 A).
Symbol Description
FAIL
(Board error)
FREQ
(Power frequency error)
PHASE
(negative phase sequence)
HBA1
(Heater break alarm 1)
THY.B
(Thyristor break-down alarm)
HBA2
(Heater break alarm 2)
OCR
(Over current)
FUSE
(Fuse break)
This lamp lights if a board error of this instrument is detected by
the self-diagnosis function.
This lamp lights if power frequency is out of the allowable range
(detecting range) when power is turned on or during operation.
This lamp lights if negative phase sequence or the open phase
is detected.
Lights when Heater break alarm 1 output is turned on.
HBA1 is not available when heater break alarm is not provided.
Lights when thyristor break-down alarm output is turned on.
Thyristor break-down alarm is not available when heater break
alarm is not provided.
Lights when Heater break alarm 2 output is turned on.
HBA2 is not available when heater break alarm is not provided.
This lamp lights if the current of more than 1.2 times the rating
of this instrument flows.
when heater break alarm is not provided.
This lamp lights if the fast-blow fuse in this instrument blew.
Fuse break alarm is not available when the fast-blow fuse (with
microswitch) is not provided.
The over current alarm is not available
Action taken when
an error occurs
Thyristor output OFF
Thyristor output OFF
The output can be turned
ON when the error is
canceled.
Thyristor output OFF
Control is continued.
Control is continued.
When shorted:
Thyristor output continues
to be turned ON.
When broken:
Thyristor output OFF
Control is continued.
Thyristor output OFF
Thyristor output OFF
IMR01V02-E1
5
2. MOUNTING
In order to prevent electric shock or instrument failure, always mount or remove
this instrument after power supplied to the entire system is turned off.
As the temperature of this instrument becomes high, mount the instrument on
a non-inflammable material (metal plate, etc.).
As this instrument generates a large amount of heat, it is cooled by circulating
air by convection. Therefore, if mounted in any direction other than specified,
accident or failure may result.
When carrying this instrument, hold the heat radiation fin. In addition, always
carry it with the heat radiation fin cooled.
WARNING
!
2.1 Mounting Environment
Avoid the following conditions when selecting the mounting location:
• Ambient temperature of less than 0 °C or more than 40 °C.
(The rated current drops when the ambient temperature exceeds 40 °C.)
Load current (%)
100
80
60
40
20
0
10 20 30 40 50 55
Temperature characteristic of load current
• Ambient humidity of less than 5 % or more than 95 % RH.
(Absolute humidity: MAX. W. C 29 g/m
3
dry air at 101.3 kPa)
• Rapid changes in ambient temperature which may cause condensation.
• Corrosive or inflammable gases.
Temperature (°C)
60
• Such a place where there are inflammable materials near this instrument.
• Direct vibration or shock to the mainframe.
• Water, oil, chemicals, vapor or steam splashes.
• Excessive dust, salt or iron particles.
• Excessive induction noise, static electricity, magnetic fields or noise.
• Exposure to direct sunlight.
• Excessive heat accumulation.
6 IMR01V02-E1
2.2 Mounting Cautions
Take the following points into consideration when mounting this instrument.
Mount this instrument in the direction shown below.
Vertical
direction
Upper
2. MOUNTING
THW-3
Provide adequate heat radiation space so that heat does not build up.
At least 20 mm is necessary on the left and right and at least 100 mm on the top and bottom.
If the panel inside temperature rises due to self-generation of heat, install a forced circulation fan
so that the panel inside is fully ventilated with the open air.
Unit: mm
100
or more
THW-3 THW-3
20 or more20 or more
100 or more
100
or more
20 or more
THW-3 THW-3
100 or more 100 or more
IMR01V02-E1 7
2. MOUNTING
r
r
2.3 Dimensions
Dimensions
A
2-φ6
8 7
2-φ12
B C
D *
* Dimensions when the connecto
plug (optional) is connected.
When connecting the connecto
plug, install the thyristor by taking
6
R3
enough space for its wiring into
account.
Unit: mm
Dimensions
Types
A B C D
20 A, 30 A, 45 A and 60 A types
80 A and 100 A types
8
314.0 200.0 203.0 212.0
347.0 230.0 235.0 244.0
IMR01V02-E1
Mounting dimensions
20 A, 30 A, 45 A and 60 A types 80 A and 100 A types
2. MOUNTING
単位: mm
4-M5
±0.2
302.0
±0.2
183.0
Setter (Potentiometer, Knob and Scale plate)
10
φ6
φ
2.8
18.7
φ
16.1
Knob
2
M9 × 0.75
φ24
13.5
10 10
Potentiometer
(Resistance 5 kΩ, variation characteristic: B)
±0.2
335.0
4-M5
213.0
40
30
20
10
0
Scale plate
±0.2
50
48
60
100
70
80
90
THW-3
Unit: mm
48
IMR01V02-E1
10
0
Set the potentiometer full counterclockwise and combine with
a scale plate.
When setting the knob on the scale plate, align the arrow on
the knob with 0 on the scale plate.
9
2. MOUNTING
φ
Fast-blow fuse (For 20 A, 30 A, 45 A and 60 A)
18.5
Code:
THWP-F22 (20 A)
THWP-F32 (30 A)
THWP-F42 (45 A/60 A)
62.0
47
17.5
12.0
φ
25.0
Unit: mm
34.5
27.0
76.0
Without microswitch With microswitch
Fast-blow fuse (For 80 A and 100 A)
34.0
Code:
THWP-F82 (80 A)
THWP-FA2 (100 A)
Without microswitch With microswitch
70.0
40.0
95.0
30.0
25.0
φ
Step-down transformer (THWP-T01)
117
22
Code: THWP-F23 (20 A)
THWP-F33 (30 A)
THWP-F43 (45 A/60 A)
47.0
33.5
Code:
THWP-F83 (80 A)
THWP-FA3 (100 A)
Unit: mm
39.5
Unit: mm
60
L1 L2 L3 I1 I2 I3
40
5-4
73
50
31
46
10
IMR01V02-E1
2. MOUNTING
2.4 Mounting Procedures
1. Prepare the holes as specified in 2.3 Dimensions.
2. Place the instrument in mounting position.
3. Insert the mounting screws into the holes, and then tighten them with a screwdriver. Customer
must provide the set of screws.
Screw size Recommended tighten torque
M5 3.6 N⋅m (36 kgf⋅cm)
Mounting hole Mounting hole
IMR01V02-E1
Mounting hole Mounting hole
The Figure shows the type of 20 A to 60 A. However, the mounting procedure is the same as
for the type of 80 A/100 A.
11
A
A
r
3. WIRING
To prevent electric shock or instrument failure, do not turn on the power until all
the wiring is completed.
WARNING
!
3.1 Circuit Block Diagram
Step-down transforme
External gradient setting
3
2
1
External
manual mode
RUN/STOP transfer
larm interlock release
3
2
1
uto mode/Manual
mode transfer
L1 L2 L3 I1 I2 I3
1
2
3
4
5
6
7
Power terminals
Connecter
CT/PT
circuit
RST
1/L1 3/L2 5/L3
7/I18/I29/I3
Snubber
circuit
Fast-blow
fuse
Snubber
circuit
Three-phase
400 to 440 V AC
(50/60 Hz)
Fast-blow
fuse
Snubber
circuit
Fast-blow
fuse
NFB
10
11
12
8
9
Input
terminals
2/T1 4/T2 6/T3
UVW
Load
4 to 20 mA DC
(Auto mode)
1 2 3
Controller
Grounding
terminal
−+
24 V DC
NC
Alarm 1
Relay
Alarm 2
+
−
Relay
The fast blow-fuse, CT and PT are optional.
12 IMR01V02-E1
3.2 Wiring of Main Circuit
Conduct wiring by referring to the wiring diagram and the tightening torque table.
CAUTION
Always conduct wiring so that the R, S and T phases of 3-phase power coincide
with the main circuit terminals (power side), 1/L1, 3/L2 and 5/L3 on this instrument,
respectively. Otherwise the instrument may not function properly or the load may
be damaged.
R → Connect to the 1/L1 terminal. T → Connect to the 5/L3 terminal.
S → Connect to the 3/L2 terminal.
Always coincide the main circuit terminals (load side), 2/T1, 4/T2 and 6/T3 on this
instrument with the U, V and W phases of the load, respectively. Otherwise the
instrument may not function properly or the load may be damaged.
2/T1 terminal → Connect to the U. 6/T3 terminal → Connect to the W.
4/T2 terminal → Connect to the V.
When controlling the primary side of the transformer, do not open its secondary side of
circuit during operation. In addition, do not operate the instrument below the minimum
load current.
When controlling the primary side of the transformer, set magnetic field density of the
transformer to about 0.8T (8,000-gauss). If the transformer is saturated, overcurrent
flows through it to cause the thyristor to be damaged.
Imbalance between each phase of the load may result in a large error of the input/output
characteristic.
No power switch is provided in this instrument. Therefore install the switches near the
instrument, if necessary.
To avoid noise induction, keep input signal wire of controller away from instrument
power line, load lines and power lines of other electric equipment. If wiring near
high-voltage power is unavoidable, use shielded wires.
For safety, always ground the grounding terminal.
Tighten the hexagon headed bolts on the main circuit terminals using a torque wrench.
Always tighten each of them by contacting the diagonal surfaces of the wrench with
those of each hexagon head.
Recommended tool: Manufactured by TOHNICHI MFG. CO., LTD.
Model code of adjustable type torque wrench with
ratchet head
20 A/30 A QL3N M4
45 A/60 A QL6N M6
80 A/100 A QL12N M8
Use wires satisfying the rated current capacity.
Firmly tighten each terminal hexagon headed bolt with the tightening torque specified
below. Otherwise, electric shock, fire or heat generation may result.
Terminal hexagon bolt size and tightening torque list
Hexagon bolt size M4 M6 M8
Recommended tightening torque 1.6 N⋅m (16.31 kgf⋅cm) 3.8 N⋅m (38.74 kgf⋅cm) 9.0 N⋅m (91.77 kgf⋅cm)
Main circuit terminal (1/L1 to 5/L3 and 2/T1 to 6/T3)
20 A/30 A 45 A/60 A 80 A/100 A
Socket size
3. WIRING
Continued on the next page.
IMR01V02-E1 13
3. WIRING
φ
Continued from the previous page.
When using a solderless terminal lug, use ring type.
Ring type solderless terminal size
Ring type solderless terminal
D
Main circuit terminal (1/L1 to 5/L3 and 2/T1 to 6/T3)
20 A/30 A 45 A/60 A 80 A/100 A
φ
dimension 4.3 mm or more 6.4 mm or more 8.4 mm or more
D dimension 9.5 mm or less 12.0 mm or less 22.0 mm or less
Wiring of the main circuit
Table of calorific values
(400 to 440V AC)
1/L1 3/L2 5/L3
2/T1 4/T2 6/T3
Three-phase
400 to 440 V AC
(50/60 Hz)
R S T
U V W
NFB
Rated current Calorific values
20 A 82 W
30 A 118 W
45 A 172 W
60 A 226 W
80 A 298 W
100 A 370 W
Load
14
IMR01V02-E1
φ
3.3 Wiring of the Step-Down Transformer
CAUTION
Use the step-down transformer only for stepping down the voltage of power supplied to
this instrument.
Always coincide the R, S and T phases of 3-phase power with the step-down
transformer terminals (primary side: L1, L2 and L3, and secondary side: I1, I2 and
I3) and the power terminals, 7/I1, 8/I2 and 9/I3 of this instrument, respectively.
Otherwise the instrument may not function properly or the load may be damaged.
R Connect to the L1 terminal l1 terminal Connect to the 7/l1 terminal
S Connect to the L2 terminal I2 terminal Connect to the 8/l2 terminal
T Connect to the L3 terminal I3 terminal Connect to the 9/l3 terminal
3. WIRING
Use wires satisfying the rated current capacity.
When using a solderless terminal lug, use ring type.
Ring type solderless terminal size
Ring type solderless terminal
D
Power terminal (L1, L2, L3 and l1, l2, l3)
φ
dimension 3.2 mm or more
D dimension 6.5 mm or less
Recommended tightening torque 0.6 to 0.9 N⋅m (6.1 to 9.1 kgf⋅cm)
Wiring of the step-town transformer
Primary side
L1 L2 L3 l1 l2 l3
Step-down transformer
Secondary side
Three-phase
400 to 440 V AC (50/60 Hz)
RST
1/L1 3/L2 5/L3
NFB
Power terminals
7/l18/l29/l3
IMR01V02-E1
15
3. WIRING
φ
A
3.4 Wiring of Controller (Auto Mode)
When using a solderless terminal lug, use ring type.
Ring type solderless terminal size
φ
D dimension
Recommended tightening torque
Ring type
D
solderless terminal
Input terminal (1, 2 and 3)
dimension
3.2 mm or more
5.5 mm or less
0.4 N⋅m (4 kgf⋅cm)
On input signal change
The input signal is set as specified when ordering at the time of being unpacked. When changing the
input signal, conduct the following two settings.
• Set the type of input signal by Input signal by Input signal (InSS) in Engineering mode. (See P. 46)
• Change the position of the short bar to match the input type. (See the next page.)
In addition, the input signal is divided into two pieces of hardware. The input signal in the same
hardware is selectable but the input signal in the other hardware cannot be selected.
Current input 0 to 20 mA DC
Voltage input 0 to 5 V DC
Current input 4 to 20 mA DC
Voltage input 1 to 5 V DC
Voltage pulse input 0/12 V DC
Hardware 1 Hardware 2
Cannot be selected to the input
signal in the other hardware.
Voltage input 0 to10 V DC
Voltage pulse input 0/12 V DC
Voltage pulse input 0/24 V DC
n input type change may
only be made within the
hardware groups.
16
IMR01V02-E1
+
−
+
−
−
3.4.1 Wiring of the current input
For current input (0 to 20 mA DC, 4 to 20 mA DC), short terminal No.1 with terminal No.2.
Current input
0 to 20 mA DC, 4 to 20 mA DC
+ −
12 3
THW-3 input terminal
Input impedance: 100 Ω
Short
3. WIRING
Short bar
Controller: 0 to 20 mA DC,
4 to 20 mA DC output
3.4.2 Wiring of the voltage input or voltage pulse input
For voltage input (0 to 5 V DC, 1 to 5 V DC or 0 to 10 V DC) or voltage pulse input (0/12 V DC, 0/24
V DC), short terminal No.2 with terminal No.3.
Voltage input: 0 to 5 V DC, 1 to 5 V DC, 0 to 10 V DC
Voltage pulse input: 0/12 V DC, 0/24 V DC
+
1 2 3
THW-3 input terminal
Input impedance:
Hardware 1 (0 to 5 V DC, 1 to 5 V DC and 0/12 V DC): 30 kΩ
Hardware 2 (0 to 10 V DC, 0/12 V DC and 0/24 V DC): 68 kΩ
Short
Short bar
Controller: 0 to 5 V DC, 1 to 5 V DC,
0 to 10 V DC, 0/12 V DC,
0/24 V DC output
IMR01V02-E1
17
3. WIRING
f
3.4.3 Wiring of the series connection (For current input)
Current input: 0 to 20 mA DC, 4 to 20 mA DC
+ −
1 2 3
THW-3 input terminal
Input impedance: 100 Ω
THW-3 THW-3 THW-3
The number of thyristor that can be connected
depends on the resistance of temperature controller
being used. For resistance of controller, see controller
instruction manual.
3.4.4 Wiring of the parallel connection (For voltage input or voltage pulse input)
Voltage input: 0 to 5 V DC, 1 to 5 V DC, 0 to 10 V DC Voltage pulse input: 0/12 V DC, 0/24 V DC
+ −
1 2 3
THW-3 input terminal
Input impedance:
Hardware 1 (0 to 5 V DC, 1 to 5 V DC, 0/12 V DC): 30 kΩ
Hardware 2 (0 to 10 V DC, 0/12 V DC, 0/24 V DC): 68 kΩ
THW-3 THW-3 THW-3
The number of thyristor that can be connected
depends on the resistance of temperature
controller being used. For resistance o
controller, see controller instruction manual.
Controller
0 to 20 mA DC,
4 to 20 mA DC output
−
+
18
Controller:
0 to 5 V DC,
1 to 5 V DC,
0 to 10 V DC,
0/12 V DC or
0/24 V DC outputs
−
+
IMR01V02-E1
3.5 Wiring for Input/Output Connector
The input/output connector is used for the following wiring.
• External manual setting
• External gradient setting
• External contact input (Auto/Manual mode transfer, RUN/STOP transfer, alarm interlock release)
• Alarm output
3.5.1 Input/Output connector pin number and details
Pin No. Details
+5 V output
0 V
External gradient setting input
(0 to 5 V input by the gradient setter)
External manual setting input
(0 to 5 V input by the manual setter)
External contact input (DI)
Auto/Manual mode transfer: Contact closed: Manual mode
Contact open: Auto mode
External contact input (DI)
RUN/STOP transfer: Contact closed: RUN
Contact open: STOP
When using RUN/STOP transfer, it is necessary to set
RUN/STOP action (rSA) to “1: Used.”
(See P. 46)
External contact input (DI)
Alarm interlock release: Closing the contact releases the
alarm interlock
Unused
24 V DC (+)
Alarm 1: Open collector output
In order to output an alarm, it is necessary to select the type
of alarm by Alarm 1 output logic (LGA1).
(See P. 44)
Alarm 2: Open collector output
In order to output an alarm, it is necessary to select the type
of alarm by Alarm 2 output logic (LGA2).
(See P. 44)
0 V
1
2
3
4
5
6
7
8
9
10
11
12
Pin number
1
2
3
4
5
6
7
8
9
10
11
12
3. WIRING
IMR01V02-E1
19
3. WIRING
3.5.2 Caution for wiring input/output connector (plug)
• Use stranded wire of size 0.14 to 0.5 mm2 for the leadwires.
• Strip off the sheath from 8 mm from the leadwire end.
8 mm
Size 0.14 to 0.5 mm
(AWG28-20)
Input/output connector (plug)
2
3.5.3 Wiring of external manual setter
3
External
manual setter
2
Short
1
10
11
12
3.5.4 Wiring of external gradient setter
THW-3
1
2
3
4
5
6
Input/Output connector
7
8
9
20
External
gradient setter
THW-3
3
2
1
1
2
3
4
5
6
Input/Output connector
7
8
9
10
11
12
IMR01V02-E1
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