A
Single-phase Thyristor Unit
THV-1
Instruction Manual
IMR01M01-E9
Thank you for purchasing this RKC product. 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.
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 high-voltage connections such as
power supply terminals, etc. to avoid electric shock.
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.
This product is intended for use with industrial machines,
test and measuring equipment. It is not designed for use
with medical equipment.
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 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 not 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
!
CAUTION
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 product 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.
ll Rights Reserved, Copyright 2002, RKC INSTRUMENT INC.
RKC INSTRUMENT INC.
®
1. CHECKING THE PRODUCT
When unpacking your new instrument, please confirm that the following items are included. If any item is missing, damaged, or
if your manual is incomplete, please contact RKC sales office or the agent.
• THV-1: 1 unit Accessories (option)
• Instruction manual (IMR01M01-E9): 1 copy • Setter for open loop control (potentiometer, knob and scale plate)
• Short bar: 1 piece • Fuse unit (fast-blow fuse [1 piece] and holder)
The short bar is connected to the “input • Output voltmeter (150 V span or 300 V span)
and power supply terminals.” • Connector (plug)
2. CONFIRMATION OF THE MODEL CODE
Check whether the delivered product is as specified by referring to the following model code list. If the product is not identical
to the specifications, please contact RKC sales office or the agent.
THV− 1 P Z − ∗ N − (−……) *
(1) (2) (3) (4) (5) (6) (7) * The code for accessory will be more than one if the product has
more than one accessory.
(1) Power supply
1: Single-phase 100 to 240 V AC
(2) Control method
PZ: Phase control/zero-cross control
(configurable)
(3) Rated current
020: 20 A
030: 30 A
045: 45 A
060: 60 A
080: 80 A
100: 100 A
(4) Input signal
5: Voltage input: 0 to 10 V DC
6: Voltage input: 1 to 5 V DC
8: Current input: 4 to 20 mA DC
Accessories (Order Separately)
THVP-S01: Setter (potentiometer, knob and scale plate)
THVP-F21: Fuse unit for 20 A (Fast-blow fuse [1 piece] and holder [3 circuits type])
THVP-F31: Fuse unit for 30 A (Fast-blow fuse [1 piece] and holder [3 circuits type])
THVP-F22: Fuse unit for 20 A (Fast-blow fuse [1 piece] and holder [1 circuit type])
THVP-F32: Fuse unit for 30 A (Fast-blow fuse [1 piece] and holder [1 circuit type])
THVP-F42: Fuse unit for 45 A (Fast-blow fuse [1 piece] and holder [1 circuit type])
THVP-F62: Fuse unit for 60 A (Fast-blow fuse [1 piece] and holder [1 circuit type])
THVP-F82: Fuse unit for 80 A (Fast-blow fuse [1 piece] and holder [1 circuit type])
THVP-FA2: Fuse unit for 100 A (Fast-blow fuse [1 piece] and holder [1 circuit type])
THVP-F20: Fast-blow fuse for 20 A (3 circuits type)
THVP-F2A: Fast-blow fuse for 20 A (1 circuit type)
THVP-F30: Fast-blow fuse for 30 A (3 circuits type)
THVP-F3A: Fast-blow fuse for 30 A (1 circuit type)
THVP-F45: Fast-blow fuse for 45 A (1 circuit type)
THVP-F60: Fast-blow fuse for 60 A (1 circuit type)
THVP-F80: Fast-blow fuse for 80 A (1 circuit type)
THVP-FA0: Fast-blow fuse for 100 A (1 circuit type)
THVP-V01: Output voltmeter (150 V span) [For phase control]
THVP-V02: Output voltmeter (300 V span) [For phase control]
THVP-C01: Connector (plug)
THVP-H01: Fuse holder for 20 A and 30 A (3 circuits type)
THVP-H02: Fuse holder for 20 A, 30 A and 45 A (1 circuit type)
THVP-H03: Fuse holder for 60 A, 80 A and 100 A (1 circuit type)
(5) Option function 1
N: No heater break alarm, current limiter and constant current control functions
H: Heater break alarm, current limiter and constant current control functions
(
The current limiter and constant current control functions are not available when the
zero-cross control.)
(6) Option function 2
N: No function
(7) Accessories
1: Setter for open loop control (potentiometer, knob and scale plate) [1 set]
and Connector (plug)
2: Setter for open loop control (potentiometer, knob and scale plate) [2 sets]
and Connector (plug)
3: Fuse unit for 20 A and 30 A
(fast-blow fuse [1 piece] and holder [3 circuits type])
4: Output voltmeter (150 V span) [For phase control]
5: Output voltmeter (300 V span) [For phase control]
6: Fuse unit for 20 A, 30 A, 45 A, 60 A, 80 A and 100 A
(fast-blow fuse [1 piece] and holder [1 circuit type])
9: Connector (plug)
Combination example of accessories
-1-3: Setter for open loop control [1 set] and Connector (plug) and Fuse unit
2 IMR01M01-E9
3. PARTS DESCRIPTION
The 20 A and 30 A types are used in the following figures for explanation, but the same explanations also apply to 45 A, 60 A,
80 A and 100 A types.
(7) Power lamp
(6) Parameter
key
(5) Connector
(socket)
Short bar
Mounting positions (upper)
Mounting positions (lower)
(1) Display
(2) UP keys
(3) Input and
power supply
terminals
(4) Main circuit
terminals
Name Description
(1) Display
Display the input signal values
and parameters.
(2) UP keys Used to change the values.
(3) Input and
power supply
Used to connect input signal
and power supply wires.
terminals
(4) Main circuit
terminals
(5) Connector
(socket)
Used to connect main circuit
wires.
Used to connect with a setter
(potentiometer), external
contact or controller.
In addition, used to heater
break alarm output.
(6) Parameter key
Used to select the desired
parameter group or to call up
the desired parameter.
(7) Power lamp
Lit when the power is turned
on.
4. MOUNTING
To prevent electric shock or instrument failure, always turn off the power before mounting or removing the
instrument.
4.1 Mounting Environment
Avoid the following conditions when selecting the mounting location:
• Ambient temperature of less than 0 °C or more than 40 °C.
The temperature inside the control panel increases due to heat generation of this instrument itself. Therefore, take into
account full ventilation by mounting forced ventilation fans on the panel.
Load
current (%)
100
80
60
40
20
0
• Ambient humidity of less than 5 % or more than 95 % RH.
• Rapid changes in ambient temperature which may cause condensation.
• Corrosive or inflammable gases.
• 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.
10 20 30 40 50 55
Temperature characteristic
(Including the closely mounted)
!
WARNING
(The rated current drops when the ambient temperature exceeds 40 °C.)
The temperature characteristic is common to
the all types (20 A, 30 A, 45 A, 60 A, 80 A and
100 A).
Temperature (°C)
60
IMR01M01-E9
3
4.2 Dimensions
c
a
20 A and 30 A types
160
172
Mounting dimensions Dimensions
Unit: mm
160 ± 0.2 200
45 A and 60 A types
Dimensions
174
188
48
125
133.5
2-M5
a
Dimensions when the connector plug (optional) is
connected. When connecting the connector plug, install the
thyristor by taking enough space for its wiring into account.
b
Minimum space when mounted closely side by side.
c
Some space for heat radiation is required in the vertical
direction between the lower and upper ends of the
instruments. Therefore, make a space of at least 200 mm
between them.
50 b
Unit: mm
Mounting dimensions
c
200
0.2
±
174
68
150
158.5 a
2-M5
a
Dimensions when the connector plug (optional) is
connected. When connecting the connector plug,
install the thyristor by taking enough space for its
wiring into account.
b
Minimum space when mounted closely side by side.
c
Some space for heat radiation is required in the
vertical direction between the lower and upper ends
of the instruments. Therefore, make a space of at
least 200 mm between them.
70 b
4 IMR01M01-E9
80 A and 100 A types
188
200
Mounting dimensions Dimensions
c
200
188 ± 0.2
Unit: mm
104
116
68
150
158.5
a
4-M5
a
Dimensions when the connector plug (optional) is connected.
When connecting the connector plug, install the thyristor by taking
enough space for its wiring into account.
b
Minimum space when mounted closely side by side.
c
Some space for heat radiation is required in the vertical direction
between the lower and upper ends of the instruments.
Therefore, make a space of at least 200 mm between them.
104 ± 0.2
120
b
4.3 Mounting Procedures
The mounting direction of the instrument must be the same as the direction shown in the figure below to provide adequate
ventilation space so that heat does not build up.
CAUTION
This unit generates heat. It is cooled by air convection when installed as shown. Failure to observe the instructions
in 4.2 and 4.3 could cause damage to the instrument, equipment or injury to personnel. Precautions should be
made for heat dissipation in the control cabinet.
1. Prepare the holes as specified in 4.2 Dimensions.
2. Place the instrument in mounting position.
3. Insert the mounting screws into the holes, then tighten them with a screwdriver.
Recommended tighten torque: 1 N⋅m [10 kgf.cm]
Customer must provide the set of screws.
Screw type: Pan-head screws (Size: M5, Length: 10 mm)
20 A, 30 A, 45 A and 60 A types 80 A and 100 A types
Mounting positions (upper)
Heat radiation direction
Heat radiation direction
Mounting positions
(upper)
Mounting
screw
Mounting
screw
The Figure shows the type of 20 A and 30 A.
However, the mounting procedure is the same
as for the type of 45 A and 60 A.
IMR01M01-E9
Mounting
direction
Mounting positions (lower)
Mounting
screw
Mounting
direction
Mounting
screw
Mounting positions (lower)
5
5. WIRING
r
To prevent electric shock or instrument failure, do not turn on the power until all the wiring is completed.
5.1 Wiring of Main Circuit
CAUTION
Always conduct wiring so that the phase of the main circuit (2/T1) coincides with that of terminal No .4 and the
phase of the main circuit (1/L1), with that of terminal No. 5. Otherwise the instrument may not function properly or
the load may be damaged.
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.
THV-1 conforms to CE marking by using the noise filter.
The noise filter specified: SOSHIN ELECTRIC CO., LTD.
20 A/30 A: LF2030A-NH 60 A: HF2060A-UP 100 A: HF2100A-UP
45 A: HF2050A-UP 80 A: HF2080A-UP
Noise filte
1 3
Power supply
100 to 240 V AC
IN OUT
G
2 4
!
WARNING
THV-1
Load
23451
2/T1 1/L1
Fast-blow
fuse
Input and
power supply
terminals
There are neither fuses nor power switches in the power circuit of this instrument. Therefore install the fuses and
switches near the instrument, if necessary.
Use wires satisfying the rated current capacity.
Firmly tighten each terminal screw with the tightening torque specified below. Otherwise, electric shock, fire or
heat generation may result.
When using a solderless terminal lug, use ring type.
Ring type solderless terminal size and tightening torque
Main circuit terminals (2/T1, 1/L1)
20 A and 30 A 45 A and 60 A 80 A and 100 A
3.8 N⋅m
(38 kgf⋅cm)
9.0 N⋅m
(90 kgf⋅cm)
φ D
Ring type
solderless
terminal
Item Power terminals
(4, 5)
φ 3.2 mm or more 4.3 mm or more 6.4 mm or more 8.4 mm or more
D (mm) 5.5 mm or less 9.5 mm or less 13.2 mm or less 22.6 mm or less
Recommended
tightening torque
0.4 N⋅m
(4 kgf⋅cm)
1.6 N⋅m
(16 kgf⋅cm)
Wiring diagram of main circuit
!
Always conduct wiring so that the
phase of the main circuit (2/T1)
coincides with that of terminal No .4
and the phase of the main circuit
(1/L1), with that of terminal No. 5.
Otherwise the instrument may not
function properly or the load may
be damaged.
Can use it only in phase control.
THV-1
Input and
power supply
terminals
Main circuit
terminal (2/T1)
Output voltmeter (option)
V
Power supply
100 to 240 V AC
(50/60 Hz)
NL
12345
Terminal screws size
20 A/30 A 45 A/60 A 80 A/100 A
Main circuit
terminals
(2/T1, 1/L1)
Input and power
supply terminals
(1 to 5)
Main circuit terminal (1/L1)
Instrument power supply line (To terminal No.5)
Fast-blow fuse
M4 size M6 size M8 size
M3 size
Load
Power supply
100 to 240 V AC
(50/60Hz)
Instrument power supply line (To terminal No. 4)
6
Table of calorific values
20 A 30 A
100 to
240 V AC
30 W
43 W
Rating current
45 A
60 A
63 W
84 W
80 A
100 A
112 W
140 W
IMR01M01-E9
5.2 Wiring of Input Signal
r
r
+
−
r
r
−
Ω
Current input 4 to 20 mA DC, voltage input 0 to 10 V DC, 1 to 5 V DC and voltage pulse input 0/12 V DC
The input signal type can be changed by moving the short bar position. Any parameter change is not required for input type
change.
CAUTION
Firmly tighten each terminal screw with the tightening torque specified below. Otherwise, electric shock, fire or
the generation of heat may result.
When using a solderless terminal lug, use ring type.
Ring type solderless terminal size and tightening torque
Item Input terminals (1, 2 and 3)
Ring type
solderless
φ D
terminal
Current input 4 to 20 mA DC voltage pulse input 0/12 V DC
For current input (4 to 20 mA DC), short terminal
No.1 with terminal No.2.
Current input
4 to 20 mA DC
1 2 3 4 5
Short *
+ −
THV-1 input impedance: 100 Ω
φ 3.2 mm or more
D (mm) 5.5 mm or less
Recommended tightening torque 0.4 N⋅m (4 kgf⋅cm)
Voltage input 0 to 10 V DC, 1 to 5 V DC or
For voltage input (0 to 10 V DC, 1 to 5 V DC) and
voltage pulse input (0/12 V DC), short terminal
No.2 with terminal No.3.
Voltage input 0 to 10 V DC, 1 to 5 V DC
Voltage pulse input 0/12 V DC
12345
THV-1
Input and power supply
terminals
Temperature controlle
4 to 20 mA DC output
−
Short *
THV-1 input impedance
1 to 5 V DC, 0/12 V DC: 30 kΩ
0 to 10 V DC: 68 kΩ
THV-1
Input and power supply
terminals
Temperature controlle
0 to 10 V DC output
1 to 5 V DC output
0/12 V DC pulse output
−
+
The input signal type can be changed by moving the short bar position. Any parameter change is not required for input type
*
+
change. However for a voltage input of 1 to 10 V DC, no input signal can be changed.
Application: Current input 4 to 20 mA DC (Series connection)
Main circuit
terminal (1/L1)
Main circuit
terminal (2/T1)
Power supply
100 to 240 V AC
(50/60 Hz)
Temperature controlle
4 to 20 mA DC
+
Input and powe
supply terminals
1 2 3 4 5
Load
THV-1 THV-1
Fast-blow fuse
Input and power
supply terminals
12345
Load
THV-1 input impedance: 100
THV-1
Input and power
supply terminals
12345
Load
The number of THV-1 that
can be connected depends
on the allowable load
resistance of temperature
controller being used. For
resistance of controller,
see specification of the
controller instruction
manual.
IMR01M01-E9
7
Application: Voltage input 0 to 10 V DC, 1 to 5 V DC or voltage pulse input 0/12 V DC
r
r
−
r
r
(Parallel connection)
Main circuit
terminal (1/L1)
Main circuit
terminal (2/T1)
Power supply
100 to 240 V AC
(50/60 Hz)
Temperature controlle
0 to 10 V DC
1 to 5 V DC
0/12 V DC
+
Input and powe
supply terminals
THV-1
1 2 3 4 5
Load
THV-1 THV-1
Fast-blow fuse
Input and powe
supply terminals
12345
Load
THV-1 input impedance
1 to 5 V DC, 0/12 V DC: 30 kΩ
0 to 10 V DC: 68 kΩ
Input and powe
supply terminals
12345
Load
The number of THV-1 that
can be connected depends
on the allowable load
resistance of temperature
controller being used. For
resistance of controller,
see specification of the
controller instruction
manual.
5.3 Wiring for connector
The connector is used for contact input, auto/manual mode selection, external gradient setting, heater break alarm 1 output
or heater break alarm 2 output. Use the optional connector (plug) for wiring.
Pin number and details
THV-1 connector
(Socket)
1
2
3
4
5
6
7
8
Pin numbers
CAUTION
Use stranded wire of size 0.14 to 0.5 mm
Strip off the sheath from 8 mm from the leadwire end.
Pin number Details
1 +5 V output
2 0 V
3 Gradient setting input (0 to 5 V input by the gradient setter)
4 External manual mode input (0 to 5 V input by the manual setter)
5 Auto/Manual mode transfer (contact open: auto mode)
Shorting No.2 pin (0 V) with No.5 pin results in the manual mode.
6 Open collector output (+):
Used for output of the heater break alarm 1 or heater break alarm 2.
7
Open collector output (−):
Used for output of the heater break alarm 1 or heater break alarm 2.
8 Unused
2
for the leadwires.
8 mm
Stranded wire:
size 0.14 to 0.5 mm
(AWG28-20)
2
Connector (plug
)
8
IMR01M01-E9
r
r
A
Contact input ON/OFF control
For contact input, short connector
pin No.2 with connector pin No.5.
Controller
ON/OFF signal
C: Common
NO: Normally open
C
NO
+5 V output
THV-1 connector
1
2
4
Short
5
Pin number
For ON/OFF control, short connector pin No.2 with connector
pin No.5.
Controller
ON/OFF signal
NO
NC
C
NO: Normally open
NC: Norm ally closed
C: Common
Low limit setter High limit setter
3
2
1
3
2
1
THV-1 connector
Short
1
2
4
5
Pin numbe
Auto mode*
Manual mode (With gradient setter) Auto/Manual mode selection *
Manual
setter
For manual setting, short
connector pin No.2 with
connector pin No.5.
1
3
2
Short
1
2
4
5
Gradient
setter
THV-1 connectorTHV-1 connector
1
3
2
1
2
3
Manual
setter
3
2
1
THV-1 connecto
1
2
4
5
External contact
Pin number
Pin number Pin number
External contact closed: Manual mode
External contact open: Auto mode
* For input signal wiring, see Current input 4 to 20 mA DC, voltage input 0 to 10 V DC, 1 to 5 V DC and voltage
pulse input 0/12 V DC (P. 7).
Auto/Manual mode selection
(With gradient setter) Heater break alarm output
The gradient setting is valid for both auto mode and
manual mode.
3
Gradient setter
Manual setter
2
1
3
2
1
THV-1
connector
1
2
3
4
5
diode should be used and connected as
show in the diagram, when using a relay.
When the power is turned on, the heater
break alarm output may be turned on for up
to 0.5 ms. When an interlock circuit or any
other related circuit is used, take a necessary
measure externally for delaying the
activation of the circuit more than 0.5 ms.
THV-1 connector
Relay
Diode
External contact
External contact closed: Manual mode
External contact open: Auto mode
For input signal wiring, see Current input 4 to 20 mA DC, voltage input 0 to 10 V DC, 1 to 5 V DC and
voltage pulse input 0/12 V DC (P. 7).
Pin number
IMR01M01-E9
6
7
Pin number
9
6. SETTING
A
1
This chapter describes the display menus on the LED display.
6.1 Display Flowchart for Monitor and Setting Parameters
The instrument has two monitor/setting modes.
• Parameter group 1 includes parameters for both monitoring and setting such as Input Signal Monitor 1, Phase Angle
Monitor, Phase/Zero-cross control selection, and others.
• Parameter group 2 includes parameters for monitoring such as Power Frequency Monitor, Input Signal Monitor 2, and
others.
Power ON
fter the maximum load current value is displayed on the display, the display will automatically change to
the input signal monitor 1. (Display for approx. 1 second)
Input signal
monitor 1
Output limiter
(high)
Maximum load current
set value for alarm
Heater break alarm 2
used/unused
1
1
Phase angle
ratio monitor
Output limiter
(low)
Heater break
alarm 1 set value
setting
Current limit value
setting
1, 2
Control method
Base-up
set value
1
Number of alarm
delay times
Alarm output
state selection
1
1
Soft-start time
Output mode
for phase control
Heater break
alarm type 1
These parameters are not displayed when the heater break
alarm, current limiter and constant current control functions
are not provided.
2
Factory set value varies depending on the instrument
specification.
Soft-down time
Internal manual
set value
Alarm output
selection
1
Internal gradient
set value
Contact input
action
Heater break alarm 2
set value setting
: Press the key.
1
Parameter group 1
10
Parameter group 2
Power frequency
monitor
Parameters other than
Monitor and CT Input Monitor return to Input Signal Monitor 1 if key
operation for more than one minute is not performed.
Input signal
monitor 2
Input Signal Monitor 1, Phase Angle Ratio
External gradient
set value monitor
* These parameters are not displayed when the heater break
alarm, current limiter and constant current control functions
are not provided.
Press the key for 2 seconds.
External manual
set value monitor
Contact input
state monitor
Error or alarm display
If any error or alarm occurs, the present display is
changed to the error or alarm display.
: Press the key.
Error display
CT input
monitor
*
IMR01M01-E9
6.2 Display Sequence
r
6.2.1 Selecting parameter group
After power-on to the instrument, the display automatically goes to Input Signal Monitor 1 in Parameter Group 1. To go to
Parameter Group 2 display, press and hold the Parameter Key for 2 seconds.
Parameter group 1
Press the parameter
key for 2 seconds.
Parameter group 2
Press the parameter
key for 2 seconds.
6.2.2 Changing parameter settings
Parameter key: Used for parameter calling up and set value registration.
UP keys: Used to change the numeric value.
Example: Change control method (parameter group 1) from phase control to zero-cross control
Parameter group 1
Input signal monitor 1
Press the paramet er k ey
twice to display the control
method.
Setting range (Control method)
0: Phase control
1: Zero-cross control
Other parameters can be set in the same way as the example above.
Control method
Control method
Press the UP key unde
the first digit from the right
to change the value to 1.
Soft-start time Control method
Control method
When the value is changed, it will
be automatically stored after three
seconds without any key operation.
The value will be also stored if the
Parameter key is pressed.
Press the Param et er key to
go to the next parameter.
6.2.3 Parameter list
Parameter group 1
Name
Input signal
monitor 1
Phase angle ratio
monitor
Control method
Parameter
Symbol
No
parameter
Display range
or
Setting range
0 to 100 %
0 to 100 %
When 0 %:
phase angle 0°
When 100 %:
phase angle180°
0: Phase control
1: Zero-cross control
Factory
set
Details
value
Displays one of the following values
depending on the control mode and
the setting of Contact Input Action.
• Input signal from controller
• External Manual Set value
• Internal Manual Set value
For this selection, see item 7.1 Selecting
Manual Mode Type and Input Signal
Monitor 1 (P. 15).
Phase angle
180 °
Phase angle
135 °
Phase angle
90 °
Phase angle
45 °
100 %
75 %
50 %
25 %
0 Select the control method. P. 15
Reference
page
P. 15
Display this value.
Continued on the next page.
IMR01M01-E9
11
Continued from the previous page.
Parameter group 1
Factory
set
value
Details
Reference
page
Name
Soft-start time 1
Parameter
symbol
Setting range
0.0 to 99.9 seconds 0.1 Set the soft-start time. P. 15
Soft-down time
0.0 to 99.9 seconds 0.1 Set the soft-down time. P. 15
Internal gradient
set value
0.00 to 1.00
0.00: Internal gradient
1.00 Set the internal gradient set value. P. 16
0 %
1.00: Internal gradient
100 %
Output limiter
(high)
Output limiter
3
(low)
0.0 to 99.9 % 99.9
0.0 to 99.9 % 0.0
Set the output limiter (high) setting.
Set the output limiter (low).
2
The base-up set value is effective only
2
P. 16
P. 16
when the output limiter (low) is set to
0.0.
Base-up
set value
3
0.0 to 99.9 % 0.0
Set the base-up set value (output
bias) of output.
4
The base-up set
P. 16
value is effective only when the output
limiter (low) is set to 0.0.
Output mode for
phase control
5
0: Proportional phase
angle to input
1: Proportional voltage
to input
2
Select the output method for phase
control with linearity (R: resistor) load.
The setting is invalid when zero-cross
control is selected.
P. 17
2: Proportional square
voltage (electric
power) to input
3: Constant current
control 6
Internal manual
set value
Contact input
action
0.0 to 99.9 % 0.0 Set the internal manual set value.
0: External manual
mode ↔ Auto mode
1: Internal manual mode
↔ Auto mode
2: Internal manual mode
(fixed)
Select the contact input action. This
0
selection also affects the display of the
Input Signal Monitor 1.
Display of the Input Signal Monitor 1
Contact
input action
0 Input signal
1 Input signal
2 Internal Manual Set value
Contact
open
from
controller
from
controller
Contact
close
External
Manual Set
value
Internal
Manual Set
value
See 7.1 on
page 15.
(See P. 11)
Maximum load
current set value
for alarm
7
0.0 to 32.0 A
0 to 55 A (45 A)
0 to 70 A (60 A)
0 to 90 A (80 A)
(20 A/30 A)
Note
Sets the maximum heater current
value.
The value is used for the heater break
alarm 1 and heater break alarm 2.
P. 18
0 to 110 A (100 A)
1
If a load generating large rush current is used, thyristor break-down may occur when no soft-start time is appropriately set.
Also in zero-cross control, no rush current can be suppressed even if the soft-start time is set.
2
Output Limiter (High) value must be equal or higher than Output Limiter (Low).
3
These function can not be used together.
4
Base-up set value will not exceed the Output Limiter (High).
5
The output mode setting is invalid when the control method is zero-cross control.
6
These parameters cannot be set when the heater break alarm, current limiter and constant current control functions are not
provided. If the rated current of thyristor differs from that maximum load current flowing through the heater when the constant
current control is selected, compensate for the difference by setting the gradient. Set the gradient so that the maximum heater
load current will flow through the heater at an input signal of 100% from the controller. (See P. 17)
7
These parameters are not displayed when the heater break alarm, current limiter and constant current control functions are not
provided.
Note: The factory set value is as follows.
20 A/30 A: 30.0 45 A: 45 60 A: 60 80 A: 80 100 A: 100
12
IMR01M01-E9
Parameter group 1
Name
Heater break
alarm 1 set value
1, 2
setting
Number of alarm
delay times
1
Parameter
symbol
Setting range
0 to 100 %
0: Heater break alarm 1
unused
3
0 to 99 times
Factory
set
value
20
30
Details
Set the heater break alarm 1 set
value.
(See page 18 for Heater Break Alarm.)
Set the number of alarm delay times.
This setting is common to both Heater
Reference
Break Alarm 1 and Heater Break
Alarm 2.
0: Type 1
1: Type 2
When the control method is phase
0
control, select an appropriate heater
Heater break
alarm type
1, 4
break alarm.
Alarm output
selection
1
0: Heater break alarm 1
1: Heater break alarm 2
(heater deterioration)
Select the alarm type to be output
0
from the digital output terminal of the
connector.
2: Logical OR of heater
break alarm 1 and
heater break alarm 2
(heater deterioration)
Heater break
alarm 2 set value
1, 5
setting
(Heater deterioration)
Heater break
alarm 2
used/unused
Current limit value
setting
1, 7, 8
1, 6
0 to 100 %
0: Heater break alarm 2
unused
0: Unused
1: Used
0.0 to 32.0 A
0 to 55 A (45 A)
0 to 70 A (60 A)
0 to 90 A (80 A)
(20 A/30 A)
15
Note
Set the heater break alarm 2 set
value.
(See page 18 for Heater Break Alarm).
Set use/unuse of heater break alarm 2.
0
If set to “0: Unused,” no alarm is
output.
Set the current limit value.
If a current limit value is set to its
maximum value, the current limit
function is deactivated.
0 to 110 A (100 A)
1
These parameters are not displayed when the heater break alarm, current limiter and constant current control functions are
not provided.
2
When the control method is Phase Control, RKC recommends:
- Set the heater break set value to approximately 20 % of the maximum load current value for heater break alarm Type 1.
- Set the heater break set value to approximately 10 % of the maximum load current value for heater break alarm Type 2.
When the control method is Zero-cross Control, RKC recommends:
- Set the heater break alarm set value to approximately 80 % of the reading of current transformer input.
- Set the heater break alarm set value to a slightly smaller value to prevent a false alarm when power supply variation is
large.
- Set the heater break alarm set value to a slightly larger value to detect a failure of one heater when more than one
heaters are connected in parallel. But the set value should be less than the maximum reading of current transformer
input.
3
The number for the delay times for heater break alarm 2 is “the set value of Number of Alarm Delay Times” multiplied by
10.
4
The setting is invalid when zero-cross control is selected.
5
When the control method is Phase Control and heater break alarm Type 1 is selected, RKC recommends:
- Set the value must be equal or less than the heater break alarm 1 set value.
When the control method is Phase Control and heater break alarm Type 2 is selected:
- For the type 2, this item is not available. Set the “0: Heater break alarm 2 unused.”
When the control method is Zero-cross Control, RKC recommends:
- If the alarm needs to be output before a heater break occurs, set the set value of heater break alarm 2 to any value
slightly larger than that of heater break alarm 1.
- If the alarm needs to be output before thyristor break-down occurs, set the set value of heater break alarm 2 to any value
slightly smaller than that of heater break alarm 1.
6
When the heater break alarm type is Type 2:
- For type 2, this item is not used. Set the set value of heater break alarm 2 to “0: Unused.”
7
If a load through which large rush current flows is used, the current limit function cannot restrict the above current. In this
case, use the current limit function together with the soft- start function.
8
The current limiter function is not available when zero-cross control is selected.
Note: The factory set value (the current limiter function OFF) is as follows.
20 A/30 A: 32.0 45 A: 55 60 A: 70 80 A: 90 100 A: 110
Continued on the next page.
page
P. 18
P. 18
P. 18
P. 18
P. 18
P. 18
P. 21
IMR01M01-E9
13
Continued from the previous page.
Parameter group 1
Name
Alarm output state
selection
Parameter
symbol
Setting range
0: ON at alarm output
1: OFF at alarm output
Factory
set
value
0
Details
Select whether the open-collector
output is turned on or off when the
Reference
heater break alarm is output.
Parameter group 2
Name
Power frequency
monitor
Input signal
monitor 2
External gradient
set value monitor
External manual
set value monitor
Contact input state
monitor
Parameter
Symbol
Display range Details
0 to 99 Hz Display the power frequency. P. 18
0 to 100 % Display the value of input signal from controller.
0 to 100 %
Display the external gradient set value.
0 to 100 %
Display the external manual set value.
0: Contact closed
Display the state of the contact input.
(Manual mode)
1: Contact open
(Auto mode) 1
CT input monitor 2
0.0 to 40.0 A
0 to 90 A (45 A)
(20 A/30 A)
Display the input value of current transformer.
0 to 120 A (60 A)
0 to 160 A
(80 A)
0 to 200 A (100 A)
1
When “2: Internal manual mode (fixed)” is selected for Contact Input Action, the auto/manual mode is always in manual
mode whichever the contact state is.
2
These parameters are not displayed when the heater break alarm, current limiter and constant current control functions are
not provided.
Reference
page
page
14
IMR01M01-E9
7. FUNCTIONS
7.1 Selecting Manual Mode Type and Input Signal Monitor 1
Displays one of the following values depending on the control mode and the setting of Contact Input Action Selection.
• Input signal from controller
• External manual set value (Input signal from external manual setter)
• Internal manual set value
, input signal from controller is always displayed on Input Signal Monitor 1 when the contact input function is not used.
(The displayed item on Input Signal Monitor 1)
Contact input
action selection
0: External manual mode
↔ Auto mode
1: Internal manual mode
↔ Auto mode
Contact closed
(Manual mode)
External manual set value Input signal from controller
Internal manual set value Input signal from controller
2: Internal manual mode
(fixed)
Select manual mode type
Example: Select manual mode with internal manual set value.
1. Go to the parameter “Contact Input Action” in Parameter Group 1.
Set it to “1: Internal manual mode ↔ Auto mode.”
2. The input signal from controller is displayed when the contact is open.
The internal manual set value is displayed when the contact is closed.
7.2 Control Method
Phase control
Phase control is to continuously control electric power supplied to a load by
θ
changing phase angle
ON and OFF time.
of AC voltage applied to the load. Each half-cycle has
Zero-cross control (Continuous)
Continuous Zero-cross control is to control electric power supplied to a load by
turning the power supply voltage ON and OFF at the point of 0 V AC so that
the high frequency noise can be suppressed compared with phase control.
This on and off time is typically measured in milliseconds.
Zero-cross control (Input synchronous type)
Input Synchronous type Zero-cross control is to turn the power supply ON and
OFF synchronously with the pulse signal from a controller.
This on and off time is typically measured in seconds.
7.3 Ramp Function (Soft-Start/Soft-Down Function)
Soft-start/soft-down function gradually ramps up/down the output voltage to the demand level over the set time to prevent a
sudden change in load or voltage.
The soft-start/soft-down time sets a period of time from 0 to 100 % or 0 to 100 %.
Output voltage
100%
Soft-start time
Soft-down time
State of external contact
Contact open
(Auto mode)
Internal manual set value
Output voltage
Output limiter (high limit)
50 %
OFF OFFON
Input
signal
Soft-start time Soft-down time
100%
80%
Contact input
closed
(Manual mode)
THV-1
Contact input action
selection
IMR01M01-E9
If a load generating large rush current is used, thyristor break-down may occur when no soft-start time is
appropriately set.
In zero-cross control, no rush current can be suppressed even if the soft-start time is set.
0% 0%
Input signal
and setting
→
Time
Input signal
→
Time
and setting
Soft-start/Soft-down action diagram
→
→
Time
Time
15
7.4 Gradient Setting Function
Gradient setting is a multiplier to be applied to output to the
load to adjust the output value depending on an application.
The following two types of gradient setting are available.
• Internal gradient setting set by the THV-1 front keys
• External gradient setting set by the external gradient setter
(external potentiometer)
The output value is adjusted by Gradient Setting Function as
follows.
• (Output voltage calculated by Auto mode) × (internal gradient
setting) × (external gradient set value)
• (Output voltage calculated by Auto mode) × (internal gradient
set value)
• (Output by manual set value) × (internal gradient set value) ×
(external gradient set value)
If it is necessary to make only the external gradient set
value valid, set the internal gradient set value to 1.00.
7.5 Output Limiter (High and Low)
External gradient scale
100
80
60
40
→ Output (%)
20
0 25 50 75 100
→ Input signal (%)
Gradient output characteristics
100
80
60
40
20
0
Internal gradient
set value
1.00
0.80
0.60
0.40
0.20
0.00
This function limits the output range.
Output limiter function is related to other functions.
• Output limiter (high) and (low) have priority to the output
1
value
calculated with Gradient Setting function.
The maximum output from the instrument will not exceed the
output limiter (high) and the minimum output will not go
below the output limiter (low).
• Output limiter (high) has priority to the output value
calculated with Gradient Setting and Base-Up setting
function. The maximum output from the instrument will not
exceed the output limiter (high).
• When output limiter (low) is not set to zero (0), the base-up
setting function is invalid.
1
Output = (Input signal or manual set value) × (gradient set value)
2
Output = (Input signal or manual set value) × (gradient set value) +
(base-up set value)
7.6 Base-Up Setting Function
Base-up setting function adds positive bias to the output value
calculated with gradient setting function.
Set the Base-up set value to a value not exceeding the output
limiter (high).
• Base-up setting is valid only when output limiter (low) is set
to zero (0).
• Output limiter (high) has priority to the output value
calculated with Gradient Setting and Base-Up setting
function. The maximum output from the instrument will not
exceed the output limiter (high).
*
Output = (Input signal or manual set value) × (gradient set value) +
(base-up set value)
2
100
80
60
40
→ Output (%)
20
0 25 50 75 100
→ Input signal (%)
100
80
60
40
→ Output (%)
20
0 25 50 75 100
Input signal (%)
→
80.0 %
Output limiter (high)
10.0 %
Output limiter (low)
Base-up setting 20 %
16
IMR01M01-E9
7.7 Output Mode for Phase Control
When phase control is selected for a linearity (R: Resistance) load, one of the following four output types can be selected.
The factory set value is proportional square voltage (electric power) to input.
(The output mode setting is invalid when the control method is zero-cross control.)
Proportional phase angl e to input
100
Proportional voltage to input
100
Proportional square voltage
(electric power) to input
100
Constant current control
100
50
Phase angle ratio (%)
0
4 12 20
Input signal (m A)
50
Effective voltage (%)
0
4 12 20
Input signal (mA)
50
Electric power (%)
0
41220
Input signal (mA)
50
Current (%)
0
4 12 20
Input signal (mA)
Constant current control
This is the function used to keep the output current constant in proportion to the input signal. This function is effective when a
heater with large resistance changes caused by temperature variations is used (such as tantalum, superkanthal, tungsten,
platinum, or molybdenum). The maximum output current when the constant current control function is used coincides with the
rated current in the thyristor specification.
Operating condition Stability
Power supply voltage variation ±10 %
Load variation 2 times
Caution for using constant current control function
If the rated current of thyristor differs from that maximum load current flowing through the heater, compensate for the
difference by setting the gradient. If there is the difference, a section where control is disabled may come into existence.
A compensation example when there is a difference between the currents flowing through the thyristor and the heater is
shown in the following.
Example: When used in the following condition
• Rated current of Thyristor: 30 A • Input signal from controller: 4 to 20 mA DC
• Maximum load current of heater: 15 A • Soft-start time setting: 0.0 seconds
The soft-start function is activated during four cycles from load operation start even at a soft-start time of 0.0 seconds.
When used without setting the gradient, the maximum heater load current becomes 15 A at an input signal of 12 mA. In this
case, control is disabled if the input signal exceeds 12 mA.
Constant current control
100
±2 % of full scale
Maximum l oad c urr ent (15 A) of heater
50
Current (%)
0
4 12 20
Input signal (mA)
Control is disabled within this section.
In this case, set the gradient to 50 % so that the maximum heater load current will become 15 A at an input signal of 20 mA.
The gradient is valid even if internally set or set by the external gradient setter.
Constant current control
100
50
Gradient setting
Current (%)
50 %
0
4 12 20
Input signal (mA)
Maximum load current (15 A) of heater
IMR01M01-E9
17
7.8 Automatic Power Frequency Detection and Power Frequency Monitoring Function
Automatic power frequency detection
The instrument automatically detects a power supply frequency (50 Hz or 60 Hz) when the power is turned on.
Detection range: 50 Hz = 45.0 to 54.9 Hz, 60 Hz = 55.0 to 64.9 Hz
Power frequency monitoring function
This function monitors the power supply frequency and when it goes out of the detection range, the error message display
appears.
7.9 Heater Break Alarm Function
The heater break alarm monitors the current flowing through the load by a dedicated current transformer (CT).
The THV compares the measured value with the set values, and detects a fault in the heating or cooling circuit. In addition,
there are several types of heater break alarms depending on control methods and applications of these heater break alarms.
Read this chapter carefully to choose an suitable method and set an appropriate set value.
7.9.1 Common function for all types
Number of alarm delay times
To prevent producing a false alarm, the alarm function waits to produce an alarm status until the measured current by the CT
is in an alarm range for the preset number of consecutive sampling cycles. The parameter of the number of alarm delay times
is to change the number of consecutive sampling cycles by 5-cycle increment.
Heater break alarm 1: (5 cycles) × (Number of alarm delay times)
Heater break alarm 2: (5 cycles) × (Number of alarm delay times) × 10
7.9.2 Heater break alarm for phase control
There are two alarm types (type 1 or type 2) available for phase control.
(1) Type 1
Type 1 can be used as follows by using two heater break alarm set values. (See Application)
Heater break alarm 1 set value: The alarm can be output when a heater break occurs by setting the heater break alarm set
Heater break alarm 2 set value: This alarm set value can be used as an auxiliary alarm.
• The heater break alarm of Type 1 cannot be used for heat generation substances such as noble metals
making large resistance changes with temperature variations. In addition, it cannot be used for heat
generation substances such as silicon carbide making resistance changes with temperature variations and a
lapse of time.
• Type 1 cannot be used for any power supply waveforms other than a sine waveform.
How alarm is activated
• When heater current does not flow (Heater break, malfunction of the control device, etc.)
When the phase angle is equal to or more than 15% and the current transformer input value is equal to or less than the
heater break alarm set value for the preset number of consecutive sampling cycles, an alarm status is produced.
However, in order to prevent malfunctioning, it is so designed that no heater break alarm occurs at an phase angle
of less than 15 % (less than 15 % of maximum load current).
• When heater current can not be turned off (Thyristor break-down or permanent damage)
When the current transformer input value is equal to or greater than the heater break alarm set value for the preset number
of consecutive sampling cycles, an alarm status is produced.
The alarm will be turned off when the current transformer input value goes in and stays at non-alarm range for five
consecutive cycles.
Application (When heater break alarm 1 is used for detecting any broken heater or heater break alarm 2,
for detecting any deteriorated heater.)
Setting the parameter to the following value takes the action as shown in the Fig (P. 19).
• Maximum load current set value for alarm ( ) *: 20 A
• Heater break alarm 1 set value setting ( ): 20 %
• Number of alarm delay times ( ): 0 times
• Heater break alarm type ( ): 0: Type 1
• Alarm output selection ( ): 2: Logical OR of heater break alarm 1 and heater break alarm 2
• Heater break alarm 2 set value setting ( ): 15 %
• Heater break alarm 2 used/unused ( ): 1: Used
• Alarm output state selection ( ): 0: ON at alarm output
Always set the maximum heater current value.
*
For details of heater break alarm, see the separate Setting Method of Heater Break Alarm (IMR01M05-E).
value.
For example, it can be used as a heater deterioration alarm if set to any value slightly
smaller than the heater break alarm set value to output the alarm before a heater break
occurs when the load current decreases due to heater deterioration, etc.
Delays by the same number of cycles as that when
the number of alarm delay times is set at 1 even
with the number of alarm delay times set at 0.
Continued on the next page.
18
IMR01M01-E9
Continued from the previous page.
A
A
Heater break alarm 1 set value
= (Maximum load current set value) × (Heater break alarm 1 set value)
= 20 A × 20 % = 4 A Heater break alarm 1 set value 4 A
Heater break alarm 2 set value
= (Maximum load current set value) × (Heater break alarm 2 set value)
= 20 A × 15 % = 3 A Heater break alarm 2 set value 3 A
The 4 and 3 amperes are set (deviation setting) to the high and low sides of the computed heater current value.
Current (A)
Maximum load current (20 A)
Thyristor breakdown side
Alarm range
of heater
break alarm
Operation point of heater break alarm 1 (upper)
larm range of heater deterioration alarm
Operation point of heater break alarm 2 (upper)
Computed heater current value
Operation point of heater break alarm 2 (lower)
larm range of heater deterioration alarm
Operation point of heater break alarm 1 (lower)
Heater break alarm 1 set value (upper):
20 % (4 A)
Heater break alarm 2 set value (lower): 15 % (3 A)
Heater break alarm 2 set value (lower):
15 % (3 A)
Alarm range
of heater
break alarm
14.9 %
No heater break alarm occurs if within this range.
However, the alarm occurs in the case of thyristor break-down.
100 % 0
Heater break alarm 1 set value (lower): 20 % (4 A)
Heater break side
Phase angle (%)
How alarm is checked
If the alarm occurs, the relevant error number is shown on the display unit. Therefore in this case, check the alarm contents.
Error number Description
128 Heater break alarm 1
Error display
For the error display, see the “8. ERROR OR ALARM DISPLAY” (P. 22).
256 Thyristor break-down
512 Heater break alarm 2 (heater deterioration)
(2) Type 2
Type 2 corresponds to a heater break alarm when one heater is used. (See Application)
The heater break alarm of Type 2 is used for heat generation substances such as noble metals making large resistance
change with temperature variations.
No type 2 can be used when two or more heaters are used in parallel connection.
How alarm is activated
• When heater current does not flow (Heater break, malfunction of the control device, etc.)
When the phase angle is equal to or more than 15 % and the current transformer input value is equal to or less than the
heater break alarm set value for the preset number of consecutive sampling cycles, an alarm status is produced.
However, in order to prevent malfunctioning, it is so designed that no heater break alarm occurs at an phase angle
of less than 15 % (less than 15 % of maximum load current).
• When heater current can not be turned off (Thyristor break-down or permanent damage)
When the phase angle is 0 % and the current transformer input value is equal to or greater than the heater break alarm set
value for the preset number of consecutive sampling cycles, an alarm status is produced.
The alarm will be turned off when the current transformer input value goes in and stays at non-alarm range for five
consecutive cycles.
Application
Setting the parameter to the following value takes the action as shown in the Fig (P. 20).
• Maximum load current set value for alarm ( )
• Heater break alarm 1 set value setting ( ): 10 %
• Number of alarm delay times ( ): 0 times
• Heater break alarm type ( ): 1: Type 2
• Alarm output selection ( ): 0: Heater break alarm 1
• Heater break alarm 2 set value setting ( )
• Heater break alarm 2 used/unused ( ) 3: 0: Unused
• Alarm output state selection ( ): 0: ON at alarm output
1
Always set the maximum heater current value.
2
Always set the heater break alarm 2 to "0: Heater break alarm 2 unused."
3
Always set the heater break alarm 2 used/unused to "0: Unused."
For details of heater break alarm, see the separate Setting Method of Heater Break Alarm (IMR01M05-E).
1
: 20 A
2
: 0: Heater break alarm 2 unused
Continued on the next page.
IMR01M01-E9
19
Continued from the previous page.
f
A
r
r
f
Heater break alarm 1 set value
= (Maximum load current set value) × (Heater break alarm 1 set value)
= 20 A × 10 % = 2 A Heater break alarm 1 set value 2 A
Set the heater break alarm 1 set value to approximately 10 % of the maximum load current value. Do not set
the heater break alarm set value to more than 15 %.
Current (A)
(When the maximum load current value is set to 20 A)
Alarm range of heater break alarm
(Thyristor break-down)
When the phase angle is 0 % and the
current transformer input value is equal
to or greater than the heater break alarm
set value for the preset number o
consecutive sampling cycles, an alarm
status is produced.
Heater break alarm 1 set value 10 % (2 A)
14.9 %
No heater break alarm occurs if within this range.
However, the alarm occurs in the case of thyristor break-down.
100 % 0
larm range of heater break alarm
When the phase angle is equal to o
more than 15% and the current
transformer input value is equal to o
less than the heater break alarm set
value for the preset number o
consecutive sampling cycles, an alarm
status is produced.
Phase angle (%)
How alarm is checked
If the alarm occurs, the relevant error number is shown on the display unit. Therefore in this case, check the alarm contents.
Error number Description
128 Heater break alarm 1
Error display
For the error display, see the “8. ERROR OR ALAMR DISPLAY” (P. 22).
256 Thyristor break-down
7.9.3 Zero-cross control
The following usage is available in zero-cross control. (See Application)
Heater break alarm 1 set value: The alarm can be output when a heater break occurs by setting the heater break alarm set
Heater break alarm 2 set value: This alarm set value can be used as an auxiliary alarm.
How alarm is activated
• When heater current does not flow (Heater break, malfunction of the control device, etc.)
When the control output is ON and the current transformer input value is equal to or less than the heater break alarm set
value for the preset number of consecutive sampling cycles, an alarm status is produced.
• When heater current can not be turned off (Thyristor break-down or permanent damage)
When the control output is OFF and the current transformer input value is equal to or greater than the heater break alarm set
value for the preset number of consecutive sampling cycles, an alarm status is produced.
The alarm will be turned off when the current transformer input value goes in and stays at non-alarm range for five
consecutive cycles.
Application (When Heater break alarm 1 is used for detecting any broken heater or Heater break alarm 2,
for detecting any deteriorated heater.)
Setting the parameter to the following value takes the action as shown in the Fig.
• Maximum load current set value for alarm ( ) *: 20 A
• Heater break alarm 1 set value setting ( ): 80 %
• Number of alarm delay times ( ): 0 times
• Alarm output selection ( ): 2: Logical OR of heater break alarm 1 and heater break alarm 2
• Heater break alarm 2 set value setting ( ): 85 %
• Heater break alarm 2 used/unused ( ): 1: Used
• Alarm output state selection ( ): 0: ON at alarm output
*
Always set the maximum heater current value.
For details of heater break alarm, see the separate Setting Method of Heater Break Alarm (IMR01M05-E).
Heater break alarm 1 set value
= (Maximum load current set value) × (Heater break alarm 1 set value)
= 20 A × 80 % = 16 A Heater break alarm 1 set value 16 A
Heater break alarm 2 set value
= (Maximum load current set value) × (Heater break alarm 2 set value)
= 20 A × 85 % = 17 A Heater break alarm 2 set value 17 A
value.
For example, it can be used as a heater deterioration alarm if set to any value slightly larger
than the heater break alarm set value to output the alarm before a heater break alarm
occurs when the load current decreases due to heater deterioration, etc.
Continued on the next page.
20
IMR01M01-E9
Continued from the previous page.
Heater break alarm 2 set value 85 % (17.0 A) [heater deterioration]
Heater break alarm 1 set value 80 % (16.0 A) [heater break]
20.0 A
18.5 A
16.5 A
16.5 A 16.5 A 16.5 A 16.5 A 16.5 A
Current transformer input value
(Heater current data are updated)
Alarm output
Capture
For the preset number of consecutive sampling cycles
ON OFF
Heater break alarm 2 set value 85 % (17.0 A) [heater deterioration]
Heater break alarm 1 set value 80 % (16.0 A) [heater break]
Current transformer input value
(Heater current data are updated)
Alarm output
Heater deterioration
20.0 A
Capture
18.5 A
15.5 A
15.5 A 15.5 A 15.5 A 15.5 A 15.5 A
For the preset number of consecutive sampling cycles
ON OFF
Heater break
20.0 A 20.0 A 20.0 A 20.0 A 20.0 A
For the preset number of consecutive sampling cycles
Heater break alarm 1 set value 80 % (16.0 A) [heater break]
Current transformer input value
(Heater current data are updated)
0 A 0 A
Capture
Capture
20.0 A
Alarm output
ON OFF
Thyristor break-down
How alarm is checked
If the alarm occurs, the relevant error number is shown on the display unit. Therefore in this case, check the alarm contents.
Error number Description
128 Heater break alarm 1
Error display
For the error display, see the “8. ERROR OR ALARM DISPLAY” (P. 22).
256 Thyristor break-down
512 Heater break alarm 2 (heater deterioration)
7.10 Current Limiter Function
This is the function of limiting a measured current value to a value not exceeding the preset current limit value.
A current value is measured for each constant cycle and then the maximum phase angle not exceeding the current limit value is
calculated from the above current value thus measured. If the phase angle at that current output is larger than the maximum
phase angle calculated, the current is output at the maximum phase angle to restrict that current.
The maximum phase angle is calculated during a time period of 0.1 seconds from the start of load operation, and the current
limit function is activated after the maximum phase angle is calculated.
If a load through which large rush current flows is used, the current limit function cannot restrict the above
current. In this case, use the current limit function together with the soft-start function.
Even at a soft-start time of 0.0 seconds, the soft-start function is activated in order to calculate the maximum phase
angle during a time period of 0.1 seconds from the start of load operation.
If a current value exceeds “Current limit value + Differential gap (0.5 A or 1.0 A) *” due to voltage variations or load
resistance changes while the current limit function is being activated, the maximum phase angle is immediately
re-calculated to restrict it within a cycle of 2.5 from the time when it exceeds “Current limit value + Differential gap.”
* Differential gap 0.5 A: 20 A, 30 A types Differential gap 1.0 A: 45 A, 60 A, 80 A and 100 A types
If a current limit value is set to its maximum value, the current limit function is deactivated.
The current limiter function cannot be used when zero-cross control is selected.
IMR01M01-E9
21
8. ERROR OR ALARM DISPLAYS
When the error or alarm occurs, the display changes to the error display. When two or more errors occur simultaneously, the
error code numbers are totaled and displayed as one number. When any of the errors show below occurs, other displays will not
be displayed.
• Board error
• Data error 1
• Data error 2
• EEPROM error
• Calibration data error
When the power frequency error is displayed, the display can be changed only to the power supply frequency monitor.
Error display
Error number Description Action Solution
Error display
Display the error
number.
1 Board error Thyristor output OFF
2 Data error 1
4 Data error 2
8 EEPROM error
16
Power frequency
error 1
Thyristor output OFF
The output can be
turned ON when the
error is canceled.
32
Power frequency
Thyristor output OFF
error 2
64
Calibration data
Thyristor output OFF
error
Alarm display
Error number Description Action Solution
128
Heater break
Control is continued.
alarm 1
256
Thyristor
break-down
512
Heater break
alarm 2
(heater deterioration)
Turn off the power once. If an error
occurs after the power is turned on
again, please contact RKC sales office
or the agent.
Check the stability of power supply
frequency, and turn off the power once.
If an error occurs after the power is
turned on again, please contact RKC
sales office or the agent.
Check the value of power supply
frequency, and turn off the power once.
If an error occurs after the power is
turned on again, please contact RKC
sales office or the agent.
Turn off the power once. If an error
occurs after the power is turned on
again, please contact RKC sales office
or the agent.
Turn off the power, and check or
replace the heater, etc.
If a load generating large rush current
is used, thyristor break-down may
occur when no soft-start time is
appropriately set.
In such a case, make the soft-start time
longer.
For any causes other than the above,
turn the power off and then contact to
your nearest RKC sales agent or our
sales office.
Turn off the power, and check or
replace the heater, etc.
22
IMR01M01-E9
9. SPECIFICATIONS
Number of phase: Single-phase
Rated current: 20 A AC, 30 A AC, 45 A AC, 60 A AC, 80 A AC and 100 A AC
For the ambient temperature characteristic, see temperature characteristic graph. (P. 3)
Minimum load current: 0.6 A (20 A type), 1 A (30 A, 45 A, 60 A, 80 A and 100 A types)
Power supply voltage: 90 to 264 V AC [Including power supply voltage variation] (Rating: 100 to 240 V AC)
Power frequency: 50/60 Hz (Automatic discriminating)
Allowable power frequency variations:
±1 Hz (Performance guarantee)
±2 Hz (Operation guarantee)
Input signal: Current input 4 to 20 mA DC (Input impedance: 100 Ω)
Voltage input 0 to 10 V DC (Input impedance: 68 kΩ)
Voltage input 1 to 5 V DC (Input impedance: 30 kΩ)
Voltage pulse input 0/12 V DC (Input impedance: 30 kΩ)
Dry contact input (Input impedance: 47 kΩ)
Output voltage range: 0 to 98 % of rating voltage
Applicable load: Phase control: Linearity (R: resistor) load
Control of primary side of a transformer (Recommended magnetic field density:
0.8 T or less)
Zero-cross control: Linearity (R: resistor) load
Corresponding utilization category:
AC-51
Overload current profile and duty cycle or OFF-time:
1.1 x Ie – 60 s
Comprising the rating index:
50 - 60
Control method: Phase control (No feedback)
Zero-cross control (No feedback)
Output setting range: Internal manual set value: 0.0 to 99.9 % (Set by theTHV-1 front keys)
External manual set value: 0 to 100 % (Set by the setter
External gradient set value: 0 to 100 % (Set by the setter
Internal gradient set value: 0 to 100 % (0.00 to 1.00) (Set by the THV-1 front keys)
Output limiter (high) set value: 0.0 to 99.9 % (Set by the THV-1 front keys)
Output limiter (low) set value: 0.0 to 99.9 % (Set by the THV-1 front keys)
Base-up set value: 0.0 to 99.9 % (Set by the THV-1 front keys)
Output mode: Proportional phase angle to input 2
Proportional voltage to input 2
Proportional square voltage (electric power) to input
Constant current control (option)
2
When the phase control use the linearity (R: resistor) load
2
2
Power off leakage current:
27 mA AC rms or less (load voltage 200 V rms, 60 Hz, Ta=25 °C)
Ramp (Soft-start/Soft-down) function:
Setting range: 0.0 to 99.9 seconds (Set by the THV-1 front keys)
Auto/Manual mode selection:
External dry contact
External contact closed: Manual mode
External contact open: Auto mode
Heater break alarm function (option):
When the power source ripples of main circuit is sine-wave
Input: Current transformer (built-in)
Measured accuracy: Within ±2 A (20 A and 30 A types)
Within ±10 % of maximum load current (45 A, 60 A, 80 A and 100 A types)
Output: 1 point, open collector output 24 V DC, Max. 100 mA
Output ON/OFF at alarm is selectable.
Current limiter function (option):
Setting range
20 A, 30 A: 0.0 to 32.0 A 45 A: 0 to 55 A 60 A: 0 to 70 A 80 A: 0 to 90 A
100 A: 0 to 110 A
If a current limit value is set to its maximum value, the current limit function is deactivated.
1
)
1
)
1
Option
Continued on the next page.
IMR01M01-E9
23
Continued from the previous page.
Ambient temperature: 0 to 40 °C (Performance guarantee range), −15 to +55 °C (Operation guarantee range)
Ambient humidity: 5 to 95 % RH (Non-condensing)
Power consumption: 6 VA max.
Withstand voltage: Between main circuit, power terminals and radiation fins: 1 minute at 2000 V AC
Insulation resistance: Between main circuit, power terminals and radiation fins: 20 MΩ or more at 500 V DC
Rated conditional short-circuit current:
1500 A
20 A fast-blow fuse for 1 circuit type: Breaking capacity 100 kA
20 A fast-blow fuse for 3 circuits type: Breaking capacity 100 kA
30 A fast-blow fuse for 1 circuit type: Breaking capacity 100 kA
30 A fast-blow fuse for 3 circuits type: Breaking capacity 100 kA
45 A fast-blow fuse for 1 circuit type: Breaking capacity 100 kA
60 A fast-blow fuse for 1 circuit type: Breaking capacity 100 kA
80 A fast-blow fuse for 1 circuit type: Breaking capacity 100 kA
100 A fast-blow fuse for 1 circuit type: Breaking capacity 100 kA
Cooling method: Natural convection
Mounting method: Vertical mounting
Dimensions: See 4.2 Dimensions (P. 4).
Weight: Approx. 0.9 kg (20 A and 30 A types)
Approx. 1.4 kg (45 A and 60 A types)
Approx. 1.9 kg (80 A and 100 A types)
Standard: Safety standards: UL: UL508 (file No. E177758)
cUL: C22.2 No.14 (file No. E177758)
CSA: C22.2 No.14 (20 A and 30 A types)
CE marking: THV-1 conforms to CE marking by using the noise filter. (See P. 6)
LVD: EN 60947-4-3 (Form 4)
EMC: EN 60947-4-3 (Form 4)
EMC test standards: Emissions
The EMC emissions test standards required by the standard EN 60947-4-3 ‘Contactors
andmotor-starters - AC semiconductor motor controllers and contactors for non-motor loads’ are
presented in table 1.
Table 1: EMC emissions standards compliance
Emission type Test standard
Conducted disturbance CISPR 11 Class A Group 2
Radiated EM field CISPR 11 Class A
Immunity
The EMC immunity test standards required by the standard EN 60947-4-3 ‘Contactors and
motor-starters - AC semiconductor motor controllers and contactors for non-motor loads’ are
presented in table 2.
Table 2: EMC immunity standards compliance
Test type Test standard Test level
Electrostatic discharge EN 61000-4-2 Contact: 4kV
Air: 8kV
Radiated, radio frequency
electromagnetic field
EN 61000-4-3 Enclosure port:
80 – 1000 MHz: 10 V/m
Electrical fast transient/burst EN 61000-4-4 AC Power port: 2kV
Signal port: 2kV
Surge EN 61000-4-5 AC Power port: 1kV
Conducted disturbances
induced by radio frequency fields
EN 61000-4-6 AC Power port
Signal port:
0.15 – 80 MHz: 10 V/m
Voltage dips EN 61000-4-11 AC Power port:
0% in 5000 ms
24
IMR01M01-E9
10. ACCESSORIES (OPTION)
Setter (Potentiometer, Knob and Scale plate)
Unit: mm
10
φ6
2.8
φ
18.7
16.1
φ
Knob
2
M9 × 0.75
φ24
13.5
10 10
(Resistance 5 kΩ, variation characteristic: B)
Potentiometer
Output voltmeter (150 V span or 300 V span)
80
67
V
14 29.5
10
2-M3
16
52
φ
Fuse unit (Holder: 3 circuits type)
For 20 A and 30 A
6-M6
φ8
74
62
86
405060
30
20
10
Scale plate
2-M4
4
φ5
70
80
90
0
100
48
64
48
35
Insert the fuse as follows.
10
48
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.
Panel cutout dimensions
32 32
+0.5
0
φ54
18.5 29.5
Fast-blow fuse
2-4φ(hole)
Unit: mm
Unit: mm
63
75
Fuse unit (Holder: 1 circuit type)
For 20 A, 30 A and 45 A
94
82
105
35
2-M6
Insulation
cover
54
Fuse
holder
12
41
For 60 A, 80 A and 100 A
4
φ8
φ5
102
131
116
12
30
48
2-M10
Insulation
cover
φ11
13
35
72
Unit: mm
6
φ6
IMR01M01-E9
25
[IMQ00]
The first edition: JUN. 2002 [IMQ00]
The ninth edition: NOV. 2005
HEADQUARTERS: 16-6, KUGAHARA 5-CHOME, OHTA-KU TOKYO 146-8515 JAPAN
RKC INSTRUMENT INC.
®
IMR01M01-E9 NOV. 2005
PHONE: 03-3751-9799 (+81 3 3751 9799) E-mail: info@rkcinst.co.jp
FAX: 03-3751-8585 (+81 3 3751 8585)
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