Thyristor Type Power Adjusting Unit

INSTRUCTION MANUAL

In order to operate this product properly, operators and other persons concerned are all requested toread the “Safety Precautions” in this INSTRUCTION MANUAL thoroughly before using the product.
Strictly forward this INSTRUCTION MANUAL to the end users.

TABLE OF CONTENTSFORWARD ................................................................................................................1
SAFETY PRECAUTIONS..........................................................................................2
Safety precautions to be observed by operators................................................................................. 2
Limitations for working environments .................................................................................................. 3
Precautions in installation ..................................................................................................................... 3
Precautions in wiring.............................................................................................................................. 4
Precautions in operation........................................................................................................................ 4
Precautions in maintenance and inspection........................................................................................ 5

PRECAUTIONS BEFORE USE ................................................................................6
Confirmation of the product .................................................................................................................. 6

CONNECTION DIAGRAM OF UNIT .........................................................................7
EXTERNAL CONNECTION DIAGRAM OF UNIT.....................................................8
Connection diagram for each setting system ...................................................................................... 8
How to connect unit control cables ...................................................................................................... 9

HOW TO SET UNIT .................................................................................................10
setting of dip switch S1........................................................................................................................ 10
setting of dip switch S3........................................................................................................................ 11

FUNCTION CHARACTERISTICS ...........................................................................12
DETECTION OF ABNORMALITY ..........................................................................13
Detection and indication of abnormality ............................................................................................ 13
Self-diagnostic function ....................................................................................................................... 15External warning circuit ....................................................................................................................... 16

EXTERNAL DIMENSIONS OF UNIT ......................................................................17
FUSE TO BE USED ................................................................................................18
OTHERS ..................................................................................................................19
Precautions in use ................................................................................................................................ 19
Maintenance and inspection................................................................................................................ 20
Troubleshooting .................................................................................................................................... 20

Option .....................................................................................................................21
Display panel (Model UF-DP) ............................................................................................................... 21
Conversion board (Model UF-TB) ........................................................................................................ 21
Communication function...................................................................................................................... 21

UNIT SPECIFICATIONS..........................................................................................22

FORWARD
Thank you very much for having purchased our “Thyristor Type Power Adjusting Unit

UF1 Series”.

The Thyristor Type Power Adjusting Unit has been widely used in various fields for its operability, reliability, orother superiorities.
Our company consistently developed and manufactured the power adjusting unit starting from Thyristor elements, and obtained user’s enjoyment and satisfaction on our various products.
Now we introduce our “Thyristor Type Power Adjusting Unit
UF1 Series” that we have developedwith confidence based on actual records accumulated through many years.
In this UF1 series, an insulation-type Thyristor module is introduced in the main circuit, contributing to the minimizing of the unit’s size and weight, while an one-chip microprocessor is loaded on the control circuit,enhancing functions and performance of the unit.

1

SAFETY PRECAUTIONSBefore installing, operating, maintaining, and inspecting this unit, be sure to read the present INSTRUCTION
MANUAL and all other documents attached therein carefully in order for you to operate this unit properly. You
and others concerned are requested to completely master all the know-how, safety instructions and precautions on the unit before use.
In this INSTRUCTION MANUAL, the following safety precautions are ranked as “DANGER” and “CAUTION” .

DANGERA procedure which, if not properly followed, may cause extremely hazardous
conditions, resulting in death or serious injury.

CAUTION

A procedure which, if not properly followed, may cause hazardous conditions,
resulting in medium or slight injury and/or only damage on physical assets.

CAUTION , may cause a serious result depending on the situation.
Further, note that articles, even if noted in the
Strictly observe the articles since they describe important matters.

Sign indications for the “prohibited” and “required” actions are explained hereunder.

PROHIBITEDREQUIRED

This sign indicates the “prohibition” that you should not do.
For example,

for “Use of Fire Strictly Prohibited” .

This sign indicates the “compulsion” that you should do without fail.
For example,
for “Ground” .

Safety precautions to be observed by operators

DANGER
To prevent serious injury to the operators and others, be sure to observe the following precautions.
If live parts (input and output terminals) are exposed, be sure to house them in a box or to enclose
them with a protective cover. Not doing so may cause electric shock, or fatal accidents resulting indeath or serious injury.
To secure safety, this unit must be installed, wired, maintained, inspected, and repaired by qualified
persons or persons who are familiar with this unit.
In the event of any failure of this equipment, off-flavor, and abnormal noise, cease its operation
immediately. Not doing so may cause fire.

CAUTIONTo prevent electric shock, be sure to observe the following precautions.
Never touch any parts that are electrically “live” or “hot” .
Before wiring, maintaining, or inspecting this unit, turn off all the input power from a switch on the
distribution panel, and check to see that power is OFF.
When power is supplied to the unit, do not touch the cables connected to the power supply.
Doing so may cause electric shock or burns.

2

Limitations for working environments

CAUTION
Absolutely do not operate nor store this unit in the following environments. Doing so may cause any
failure in, damage to, or deterioration of the unit, resulting in fire.
In hot, cold, or damp areas which are not in compliance with the requirements for ambient environments specified in relevant catalogs and this INSTRUCTION MANUALIn area where exposed to direct sunlight
In area where subjected to vibration or shock
In the vicinity of the equipment that produces sparks
In area where exposed to dust, conductive dust, corrosive gases, salinity, or flammable gases, andOutdoors

Precautions in installation

CAUTION
Attach the unit vertically and perpendicularly in such a manner that a marking of its model is properly legible.
(Horizontal attaching of the unit will increase the temperature of it excessively.)
When use the unit in the environment that dust produces, please attach the unit in the installation.
In addition, please make measures so that dust does not enter in the installation.
Locate the unit at a well-ventilated and dust-free place to the extent possible.
Secure spaces necessary for discharging heat on the top and bottom and both sides of the mainbody.
When stacking two or more units especially, give a sufficient space between units so that heat fromthe lower unit does not affect the upper unit.
If you intend to install a communication function into the unit, attach a communication unit on theleft side of the unit body. Attach units in consideration of the size of communication unit sized to
24mm wide. Additionally, keep sufficient space so that its front door can be opened and closed formaintenance and inspection.
Over 20mm

Over 20mm

Over from
200 to 400mm

Over 20mm

The working ambient temperature of the unit is 50°C or below. Please do not use the unit at any
higher temperature.
The working ambient humidity of the unit is 90%Rh or below. Please do not use the unit at any
higher humidity.

3Precautions in wiring

CAUTIONAsk a specialist contractor for wiring work.
Imperfect wiring work may cause electric shock or fire.
Precautions to be taken by a specialist contractor

DANGER
Qualified specialists are required to turn off all the input power from a switch on the distribution
panel and to make sure that power is off before connecting the input and output cables.
The specialists must put a “Do not turn on this switch!” sign on the switch of the power distribution
panel in order to prevent others than the specialists from touching the switch. Not doing so may
cause electric shock or injury.
Be sure to insulate the conductive parts which are connected to the power supply with insulating
material (tube, tape, and others) . Exposure of such parts may cause electric shock or short-circuiting to the power supply, resulting in fire.

CAUTION
Select the input and output cables of gauges suitable for this unit. Excessively small gauges ofcables may cause overheating or fire.
Use the cables of a dielectric strength suitable for the circuit voltage. The cables not having sufficient dielectric strength may cause electric shock.
Be sure to use the crimp-type terminal for connections to the input and output terminals.
Improper connection may cause electric shock.

Precautions in operation

DANGER
Do not remove a unit cover. Doing so may cause electric shock.
Do not insert fingers or metal rods into the opening. Doing so may cause electric shock.
In the event of any failure of this unit, off-flavor, and abnormal noise, stop its operation immediately.
Not doing so may cause fire.

CAUTION
Do not insert fingers or rods into the opening. Doing so may cause caught-in accident by a coolingfan, resulting in injury.
Do not touch the input and output terminal portions of the unit with a metal rod or fingers. Doing so
may cause electric shock or injury.

4Precautions in maintenance and inspection

PROHIBITED
Persons other than approved persons (specialists) must not maintain, inspect, or repair this unit.
Doing so may cause electric shock, injury, or fire.

CAUTIONTo repair this unit or to replace defective parts, please contact the distributor of your purchase or
any service company.
Precautions to be taken by a specialist contractor

DANGER
When performing maintenance, inspection, or repair, be sure to wear sufficiently safe clothing. Not
doing so may cause electric shock or injury.
When performing maintenance, inspection, or repair, turn off all the input power from a switch on
the distribution panel, and check to see that power is OFF. Not doing so may cause electric shockor injury.
The workers must put a “Do not turn on this switch!” sign on the switch on the power distribution
panel in order to prevent others than the workers from touching the switch. Not doing so may cause
electric shock or injury.

CAUTION
Before maintaining, inspecting, or repairing this unit, read this INSTRUCTION MANUAL thoroughly toperform proper work. Improper work may cause electric shock or fire.
Before performing work, remove metal objects such as watches. Wearing metal objects during
work may cause electric shock or injury.
When performing work, place a sign, “Keep out! Authorized personnel only!”, in the working area toprevent other persons from entering the working area inadvertently. Not doing so may cause electric shock or injury.
Use insulated tools. Not doing so may cause electric shock.
Do not touch the high temperature parts such as transformers and heat discharging fin. Such parts
may cause injury even after turning off power.
Select replacement parts of same ratings and same type. Not doing so may cause fire.

5

PRECAUTIONS BEFORE USE
Confirmation of the product
Check the following items before installation.
Check if correct products and optional items are provided as specified in the order.
[Main body]

1

2

3
a

b

c

a

b

c

d

e

5

4
d

No.

Included items

Q’ty

1

UF1 unit body

1 unit2

Screws, nuts, and others for the connection of output wires
a: Screw (25A-250A only)

2 pcs

b: Bolt (350A and 450A only)

2 pcs

c: Washer (350A and 450A only)

4 pcs

d: Spring washer (350A and 450A only)

2 pcs

e: Nut (350A and 450A only)

2 pcs

3

Screw for the connection of a grounding terminal

1 pcs

4

Attachment volume set

1 set

a: Volume (1k

1 pcs

5

B characteristic)b: Knob

1 pcs

c: Insulation sheet

1 pcs

d: Nameplate (manual output adjustment, setting of the grade)

2 pcs

Easy lock3 pcs[Option]Option name

Model

Display panel

UF-DP

Conversion board

UF-TB

RS485 communication unit

UF-RS485

DeviceNetcommunication unit

UF-DN

CC-Link communication unit

UF-CL

PROFIBUS
communication unit

UF-PB

8 models of conversion boards, including 1A, 1V,
are available.
Refer to the “INSTRUCTION MANUAL for Conversion Board” for details.
Check if necessary PT and CT are provided for the unit when equipped with an
optional conversion board (UF-TB).
Check if the product has no damage due
to accident during transportation or othercauses.

6

CONNECTION DIAGRAM OF UNIT
Major failure
outputMinor failure
outputExternal
input and
outputterminals

Conversion
board(option)Abnormality
indication
circuit

200
0
1A
1C

PCB3

HA
HC

Conversion
Board

CN2

+
S
PS
RT
HL
AT
ST
GT
PH
VE3
VF2
VH2
VL2
VE1

UF-TB
CN3

Control circuits
PCB1

Display
panel

CN1

UF-DP

Communication
unit
CN5

V1
D1
I1

UF-RS485
UF-DN
UF-CL
UF-PR

Power supply, Gate circuit
PCB2

TF1
THS1
G2K2
CT1

FAN1

G1K1 -

THY1

+

F1

Snubber circuit
K2

PCB4 K1

K
Power
supplyL

Load

For wiring of the external input terminals, refer to the Connection Diagram for Each Setting System.
Use a transformer to obtain a 200/220V of the control power when other value of the power supply voltage is
supplied for the main circuit. Align the polarities between the main and control circuits for wiring.
THY1

Thyristor

CT1

Current transformer

FAN1

Cooling fan (forced air cooling only)

PCB

Printed circuit board

F1

Fuse
(only for models with the indication of F)

CN

Connector

THS1

Thermal switch

TF1

Fuse warning contact(only for models with the indication of F)

7

EXTERNAL CONNECTION DIAGRAM OF UNIT
Connection diagram for each setting system
Connection diagrams for each setting system are shown below.
Short circuit between GT and PH terminals during operation. Open-circuiting between them during
operation forcibly stops output.
Short-circuiting between ST and PH terminals starts output, and open-circuiting between themstops output.
GT and ST terminals function differently in stop movement as listed below.
When GT and PH terminals are open-circuited, the GT terminal immediately stops output regardless of the soft start period.
When ST and PH terminals are open-circuited, the ST terminal gradually reduces output during thesoft start period, and finally stops output.
When GT and ST terminals are short-circuited, both terminals gradually increase output to its set
value during the soft start period.
AT and PT terminals become automatic adjustment when short-circuited, and become manualadjustment when open-circuited.
HL and PH terminals start output in case that the setting of an upper limit at short-circuit or of alower limit at open-circuit is made.
Manual adjustment

Grade
1k

Manual
1k
Lower
Point
1k

+
S
PS
RT
HL
AT
ST
GT
PH
VE3
VF2

3
2
1
3
2
1
3
2
1

Two-position control

S1 1 2 3 4
ON
OFF

VH2
VL2
VE1

The setting of Grade, Manual, and Lower Point is selectively available.
In the case that Grade is not to be used, "VE3" and "VF2" are to be
short-circuited.
In the case that Lower Point is not to be used, "VL2" and "VE1" areto be short-circuited.

+

Grade
1k

3
2
1

Lower
Point
1k

3
2
1

+
S

VH2
VL2
VE1

Automatic adjustment(DC 0 to 5V)+

Adjustment
meter -

Note 1, Note 2

-

PS
RT
HL
AT
ST
GT
PH
VE3
VF2

S1 1 2 3 4ONOFFThe setting of Ratio, Upper Limit, and Lower Limit is selectively available.
In the case that Ratio is not to be used, "VE3" and "VF2" are to be
short-circuited.
In the case that Lower Limit is not to be used, "VL2" and "VE1" are to
be short-circuited.

Automatic adjustment(DC 4 to 20mA / 1 to 5V)
Adjustment
meter -

3
2
1
3
2
1
3
2
1

Ratio
1k
Upper
Limit
1k
Lower
Limit
1k

+
S
PS
RT
HL
AT
ST
GT
PH
VE3
VF2

S1 1 2 3 4
ON
OFF
Grade
1k

3
2
1

Lower
Point
1k

3
2
1

+
S
PS
RT
HL
AT
ST
GT
PH
VE3
VF2

S1 1 2 3 4
ON

OFF

VH2

VH2
VL2
VE1

The setting of Grade and Lower Point is selectively available.
Note 1 "+" and "S" are to be short-circuited in the case of a current signal.
Note 2 "S" and "-" are to be short-circuited in the case of a voltage signal.
In the case that Grade is not to be used, "VE3" and "VF2" are to be
short-circuited.
In the case that Lower Point is not to be used, "VL2" and "VE1" areto be short-circuited.

8

VL2
VE1

The setting of Grade and Lower Point is selectively available.
In the case that Grade is not to be used, "VE3" and "VF2"
are to be short-circuited.
In the case that Lower Point is not to be used, "VL2" and"VE1" are to be short-circuited.

How to connect unit control cables
Use an easy lock to bind up the control cables (for control power supply, major failure output, minor failure output, external input and output terminals, and conversion board) of the unit.

1 Fix the easy locks on the unit.

2 Bind the control cables with the easy locks.
Separate the cables for the control power supply and other cables to bind.

Other cables

Cables for thecontrol power
supply9HOW TO SET UNIT
CAUTION
Perform a setting of the unit with a good attention in that live parts are exposed when opening acover of the unit. Before setting, turn off power.

The standard initial setting of this unit is as listed below. If the unit is used under other conditions, opena cover on the lower part of the unit to change the setting of dip switch S1 located on the printed circuit.
Control system

Phase control

Type of temperature control unit

DC4-20mA or DC1-5V

Cycle control

Intermittent type

Setting of dip switch S1
1

2

3

4

ON
OFF

Item

Description

1

Control system

Phase control

OFF

Cycle control

ON

Type of temperature control unit

Cycle control

2

3

DC1-5V/4-20mA

OFF

OFF

DC0-5VOFFON

Two-position control

ON

OFF

Not defined

ON

ON

4

Intermittent typeOFF

Continuous typeON

10

Control system (S1-1)[Function] This makes a selection of phase control or cycle control. The phase control is to control thephase of half-cycle by means of its effective value.
The cycle control is to control the number of turning ON in one cycle during a certain constant period by means of its effective value. Changeover between phase and cycle controls
is not possible during output operation. Changeover between phase and cycle controls is
possible only while the power is turned off.
Use the S1-4 switches to change the setting of intermittent type/continuous type for cycle
control. However, changeover of the control system is not made during output operation.
A system is provided to prevent the changeover of control system during its operation.
Phase control waveform

Cycle control waveform

Output voltage

Output cycles(Effective value)

25%

25%
(50%)
50%
50%
(70%)
75%

75%
(86%)
100%

100%

Type of temperature control unit (S1-2, 3)[Function] This changes the signal levels sent from the temperature control unit, and selects the twoposition control. Changeover of the operating conditions of temperature control unit is possible only while the power is at a standstill, but such changeover is not possible during output operation.
However, changeover of the type of the temperature control unit is not possible during output operation. A system is provided to prevent the changeover of the type of temperature
control unit during operation.
Cycle control (S1-4)[Function] This makes a selection of intermittent type or continuous type for cycle control.
Use the S1-1 switch to change the setting of phase control or cycle control.
However, changeover of the cycle control is not possible during output operation. A system
is provided to prevent the changeover of cycle control during output operation.
Intermittent type waveform

Continuous type waveform

Output cycles(Effective value)

Output cycles(Effective value)

25%
(50%)

25%
(50%)

50%
(70%)

50%
(70%)

75%
(86%)

75%
(86%)

100%

100%

Period 1 second

Setting of dip switch S3
S3 is a switch to change the setting of the unit address when an optional RS485 communication unit isinstalled. Therefore, leave the setting of the switch as initially set.

11

FUNCTION CHARACTERISTICS
The standard unit has the linear characteristic between control signals and output level. It can be changed tohave the following characteristics.

Output voltage(V)
100.0%
90.0%
80.0%
70.0%
60.0%
50.0%
40.0%
30.0%
20.0%
10.0%
0.0%
0.0%

20.0%

40.0%

60.0%

80.0%

Set value

Function characteristics No.

Input and output characteristics

Characteristic 0

Linear characteristic

Characteristic 1

1.6th root characteristic

Characteristic 2

1.8th root characteristic

Characteristic 3

2.0th root characteristic

Characteristic 4

2.2th root characteristic

Characteristic 5

2.5th root characteristic

Characteristic 6

3.0th root characteristic

Characteristic 7

3.5th root characteristic

12

100.0％

DETECTION OF ABNORMALITY
Detection and indication of abnormality

CAUTION
In the event of any abnormality, check the Unit Abnormality lamp, stop operation of the unit, andthen turn off power.
When an abnormality detection circuit functions, an abnormality indication lamps lights up or flickers on
the right-hand side of the terminal block inside the front panel of the unit.
Abnormality indications, abnormality descriptions, operating status, and procedures to restart operation
are as listed below.

Light-emitting
diode is lit.

Light-emitting
diode flickers.

Abnormality
indication

Abnormality
description

Operating status
after detection ofabnormality

Procedures torestartoperation

OCR

Detection of
overcurrent

Operation stops.

Turn off power.

TMP

Temperature riseabnormality

Operation stops.

Turn off power.

1

F

Fuse disconnection

Operation stops.

Turn off power.

2

HET

Heater disconnection(optional)

Operation continues.

THY

Thyristor shortOperation stops.

Turn off power.

Thyristor open

Operation stops.

Turn off power.

Load shortOperation stops.

Turn off power.

Load open

Operation continues.

LOD
FRQ

Abnormal frequency

Operation continues.

L. Vo

Power supply
undervoltage

Operation stops.

3

Operation is
automatically
recovered.

1 This abnormality is available only for an 100A unit or larger.
2 This abnormality is available only for an unit with fuse.
3 This abnormality is available only for an unit equipped with a conversion board for detection ofheater disconnection (optional).
OCR
This detects overcurrent when the current exceeding 150 percent of the unit’s rated current has flowed
over several cycles. On detection of overcurrent, an “OCR” indication lights up and operation stops. To
resume operation, turn off the control power supply.
TMP
This detects temperature rise abnormality when the temperature of a cooling fin has been increased
abnormally. On detection of temperature rise abnormality, a “TMP” indication lights up and operation
stops. To resume operation, turn off the control power supply.

13

F
This detects fuse disconnection when a fuse built in the unit (optional) is disconnected. On detection offuse disconnection, an “F” indication lights up and operation stops. To resume operation, turn off thecontrol power supply.
HET
The optional function is provided to detect heater disconnection. On detection of heater disconnection,an “HET” indication lights up and operation continues.
THY
The self-diagnostic function is provided to detect Thyristor open or short. On detection of Thyristor
open or short, a “THY” indication flickers and operation stops. To resume operation, turn off the control
power supply.
LOD
The self-diagnostic function is provided to detect load open or short. On detection of load open or
short, an “LOD” indication flickers. Operation continues in the event of load open. Operation stops in
the event of load short. To resume operation, turn off the control power supply.
FRQ
This detects abnormal frequency in the event of any abnormality with frequency of control power supply. On detection of abnormal frequency, an “FRQ” indication flickers and operation continues.
L. Vo
This detects power supply undervoltage when the voltage of control power supply falls below its appropriate value. On detection of power supply undervoltage, an “L. Vo” indication flickers. Operation is at astandstill only while such abnormality is detected. When the detection of abnormality is released, operation is automatically resumed.

14

Self-diagnostic function
This function is provided somewhat differently depending on the combination with a conversion board(optional).
Without conversion
boardWith conversion
board

In running In stopping

In running In stopping

Thyristor open

Operating status after
detection of abnormality

N/A

Available

N/A

Operation stops.

Thyristor short

N/A

Available

Available

Available

Operation stops.

Load short

Available

N/A

Available

N/A

Operation stops.

Load open

Available

N/A

Available

N/A

Operation continues.

Only when conversion boards 3 (U) and 3H (U) mounted.
The item marked withis judged to be load short even in the case of Thyristor open.

Starting the unit without turning on the power of main circuit for test operation may cause its self-diagnostic function to stop operation. In such a case, release the self-diagnostic function once to restart
operation.
To forcibly release the self-diagnostic function, use a thin bar-shaped item to press the SELF CHECK
switch located on the lower-right part after opening a terminal cover on the front of the unit. When theswitch for approximately one second is pressed, the abnormality indication lamps of “THY” and “LOD”
on the upper part simultaneously flicker for about 1 minute. If the control power supply is turned off andthen on during compulsory release of self-diagnostic function, the settings are stored during such compulsory release. When the control power supply is turned on, the abnormality indication lamps of “THY”
and “LOD” flicker for about 1 minute simultaneously, indicating that the self diagnostic function is incompulsory release.
To recover the self-diagnostic function, press the SELF CHECK switch again. Doing so causes suchabnormality indication lamps to go out in the case they are flickering simultaneously.

15External warning circuit
The abnormality detection circuit, when activates, causes an external warning relay in the unit to activate. Major and minor failure relays are provided as the external warning relay.
Major failure relay
The abnormalities described below, when detected, forcibly stops operation and at the same timecauses a major failure relay in the unit to activate.
Detection of overcurrent
Temperature rise abnormality
Fuse disconnection
Thyristor open/short and load short to be detected by self-diagnosis function
Use the output of the major failure relay contact to monitor any abnormality.
NormalBetween 1A and 1C

OpenedAbnormality

Between 1A and 1C

ClosedSpecifications forrelay contact

AC 250V

0.1A-1A

DC 30V

0.1A-1A

The output of the major failure relay contact informs multiple abnormalities detected. So, check the indication of abnormality detection to know what abnormality was detected as a cause of activating therelay.
Minor failure relay
The abnormalities listed below, when detected, causes a minor failure relay in the unit to activate.
Power supply undervoltage
Abnormal frequency
Load open to be detected by self-diagnostic function
Detection of heater disconnection (optional)
There may be the cases that power supply undervoltage and abnormal frequency are detected when
the control power supply is turned on/off. Therefore, the relay does not activate for about 3 seconds
after detection of such abnormalities even when they are actually detected.
Use the output of the minor failure relay contact to monitor any abnormality.
NormalBetween HA and HC

OpenedAbnormality

Between HA and HC

ClosedSpecifications forrelay contact

AC250V

0.1A-1A

DC30V

0.1A-1A

The output of the minor failure relay contact informs multiple abnormalities detected. So, check the indication of abnormality detection to know what abnormality was detected as a cause of activating therelay.

16

EXTERNAL DIMENSIONS OF UNIT
Model

Rated
Cooling
current system

External dimensions (mm)
A

B

C

D

E

Weight(kg)

Calorific Terminal
value (W) screw

F

UF1-

025

25A

Self-cooling60

40 240 256 270 190

3

43

M5

UF1-

035

35A

Self-cooling60

40 240 256 270 190

3

57

M5

UF1-

050

50A

Self-cooling60

40 240 256 270 190

3

77

M5

UF1-

075

75A

Self-cooling60

40 240 256 270 230

3.5

113

M6

UF1-

100

100A

Air-cooling60

40 240 256 270 230

4

164

M6

UF1-

150

150A

Air-cooling

118 98 240 256 270 230

5

224

M8

UF1-

250

250A

Air-cooling

118 98 350 366 380 260

8

349

M10

UF1-

350

350A

Air-cooling

118 98 425 437 455 260

12

395

M12

UF1-

450

450A

Air-cooling

118 98 425 437 455 260

12

512

M12

= 2 : 200V/220V/254V= None : without FUSE

= 4 : 380V/400V/440V/460V/480V= F : with FUSE

25A-100A

150A
A

A
B

F

C

D

B

F

C

E

Fixing screw M4DE

Fixing screw M4

350A/450A

250A
A

A

B

F

C

B

F

D

E
C

D

E

Fixing screw M6

Fixing screw M6

17

FUSE TO BE USED
Unit current

Fuse
200V/400V

25A

660GH 50S-F

35A

660GH 63S-F

50A

660GH 100S-F

75A

660GH 125S-F

100A

660GH 160S-F

150A

660GH 250S-F

250A

660GH 350S-F

350A

660GH 500S-F

450A

660GH 710S-F

18

OTHERS
Precautions in use
Use cables with sufficient capacity to the rated current of the unit, for wiring of the main circuit.
For wiring of the main circuit, connect a K terminal to the power supply side, and an L terminal to
the load side.
Securely align the phase of power supply for main circuit with the same for control circuit.
Do not bind cables for control circuit with those for main circuit.
In the case of low capacity load (approx. 10% of rated capacity or lower) , the “LOD” indicator lamp
may light up by self-diagnostic function, but this does not give any problem on operation.
When storing the unit in the cabinet, provide ventilation in consideration of the internal calorificvalue by the unit.
(The internal calorific value is specified in the “External Dimensions of Unit” section.)
When the unit is operated in the cycle control, using a fuse-attached model of the unit is preferable.
In the case of low capacity load, a leakage current may be applied onto the load side, causing any
malfunction even if the signal is off.
So connect a bleeder resistor in parallel with the load. (The minimum load current is 1A or more.)
Be sure to attach the unit vertically and perpendicularly with an attachment space secured as
instructed in the “Precautions in Installation” . Attaching the unit in the horizontal direction or reducing the attachment space will adversely affect a cooling effect and abnormally increase the temperature of the unit.
Attach the unit so that its front door can be opened and closed for maintenance or inspection.
Do not apply 5V or more, or 20mA or more from the temperature control unit.
In the case of inductive load (including transformer load), a voltage exceeding the rating may be
applied onto the load side of the unit caused by abnormal voltage due to oscillation under low load,
or by surge voltage due to gate block (including ON/OFF from the GT terminal) or service interruption under transformer load, and other reasons. Therefore, install a CR absorber on the load side of
the unit.

UF1 unit

C
R

Current (A)200V system unit

Loadtransformer(including PT)
meter

400V system unit

Capacitor (µF)

Resistor ( )Capacitor (µF)

Resistor ( )25-1000.5 (AC400V)

50 (120W)

1 (AC800V)

50 (120W)

150-350

1 (AC400V)

20 (120W)

1 (AC800V)

20 (120W)

450

2 (AC400V)

20 (120W)

2 (AC800V)

20 (120W)

19

Maintenance and inspection
It is noted that dust, moisture, overheating, vibration, and others may degrade performance or
cause any failure of the unit.
Securely turn off the power for main and control circuits when conducting maintenance and inspection. Keep in mind that any voltage is applied to the circuit even after the start/stop switch is set tostop.
When a warning circuit functions, an abnormality indication lamps lights or flickers on the front side
window of the unit. So turn off the power after checking the content of warning.
When the “OCR” or “F” is lit, any abnormal current is applied onto the unit. Eliminate possible
causes to restart operation in such case.
When the “TMP” is lit, a cooling effect is worsened due to any failure of a fan and other causes.
Replace such fan with a new one to enhance the cooling effect, and then re-operate the unit.
When the “THY” flickers, a Thyristor is faulty, or the abnormality detection lines are disconnected or
short-circuited. Replace such Thyristor with a new one or check the lines, and then re-operate theunit.

Troubleshooting
If occurrence of a trouble is suspected, read this INSTRUCTION MANUAL carefully to inspect the following items. If the trouble is not solved yet, be sure to turn off the power supply of the unit, and contact
our distributors nearest you or our business offices.
Situation

Possible causes

RemedyOutputdoes notcome out.

Is not the control power 160V or less?

Adjust the power supply voltage to200/220V.

Are not lines between ST and PH opened?

Short-circuit between ST and PH.

Are not lines between GT and PH opened?

Short-circuit between GT and PH.

When the setting of grade is not used, are notlines between VF2 and VE3 opened?

Short-circuit between VF2 and VE3.

Is the setting of grade 0?

Increase the grade.

Is a phase of the power supply for main circuitaligned with the same for control circuit?
(There may be the case that the LOD flickers.)

Align both phases.

Is wiring improper?

Check wiring.

Is any of the abnormality indication lamps lit or
flickering?

Eliminate possible causes, and thenturn on/off the control power.

Is switch S1 set improperly?

Check its setting procedure again.

Are polarities of PT and CT aligned in thecase of constant power control?

Align such polarities.

Is switch S1 set improperly?

Check its setting procedure again.

Is conversion board set improperly?

Check its setting procedure again.

Output isabnormal.

20

OPTION
Display panel (Model UF-DP)
Functions
Using a display panel provides the following functions. Read the “INSTRUCTION MANUAL for Display
Panel” for details.
Can display output current, voltage, andpower for checking.

The functional feature allows the selection of seven types of input/output characteristics in addition to linear type. One
of seven types allows arbitrary setting of
input/output characteristics.
Additionally, the value once set is stored
even after power is turned off.

The percentage of the setting of the control signal sent from the temperature control unit, manual (upper limits), lower
point (lower limits), and grade signal canbe displayed for checking.
Arbitrary setting of the control signal, manual(upper limits), lower point (lower limits), andgrade signal without externally attaching a
volume is possible from the display panel.
Arbitrary setting of the soft-start time, current limit, and detection of heater disconnection is possible from the display panel.
Controlling of Start/Stop is possible fromthe display panel.

Conversion board (Model UF-TB)
Function
Using a conversion board provides the following functions. Read the “INSTRUCTION MANUAL for
Conversion Board” for details.
Can control output by constant voltage,
constant current, and constant power
controls.

Can contribute to enhancing the selfdiagnostic function. However, each function varies depending on the type of theconversion board.

Heater disconnection can be detected forchecking.
Using the conversion board in combination with the display panel enables to display output current, voltage, and power.

Communication function
This unit is applicable to the Open Network
communication system such as DeviceNet,
etc. Any inquiry about its communication
function should be addressed to our sales
department.

Communication unit
UF-RS485
UF-DN
UF-CL
UF-PB

21

Applicable network
RS485 communication unit
DeviceNet communication unit
CC-Link communication unit
PROFIBUS communication unit

UNIT SPECIFICATIONS
Description
ModelsMaincircuitPhase
Rated input voltage
Fluctuation range ofpower supply
Rated frequency
Rated current(at ambient
temperature of 50°C )Control
Control power supply
circuit
Performanceassurance voltage
Operation
assurance voltage
Power supply for fan
Control system

Specifications
Without fuse : UF1-2
With fuse: UF1-2
F , UF1-4
F
Single phase
100/110/120V , 200/220/254V , 380/400/440/460/480V±10%
50/60Hz (automatic judgment system of frequency)
25A, 35A, 50A, 75A, 100A, 150A, 250A, 350A, 450A
(600A, 800A, 1200A Semi-standard)
AC200/220V Single-phase 25VA (50VA for 100A unit or larger)
AC180V~AC242V
AC160V~AC242V

Common use with the control power supply (100A unit or larger)
Phase control
Cycle control (Intermittent type/Continuous type)Feedback control is not available for continuous type.
Adjusting range of output voltage Phase control 0%~98% (Effective value)
Cycle control 0%~98% (Effective value) (at number of cycles of 100%)
Setting range of grade
0%~100% (with reference to output)
Setting range of lower point
0%~100% (with reference to output)
Input and output properties
Linear properties ±3% F.S. (at 10~90% output)
But, in the case of cycle control of continuous type is linear properties ±5% F.S.
Ambient temperature-10°C~50°C (at humidity of 90%RH or below)
Storage temperature-20°C~70°C
Applicable load
Phase control : resistive load, inductive load, transformer primary side control
Cycle control : resistive load, transformer primary side control (optional)
Control signal
Current signal : DC4mA~DC20mA (with internal resistor of 250 )Voltage signal : DC1V~DC5V, DC0V~DC5V (with internal resistor of 10k )Start/Stop system
Soft start/down system 0.5sec (standard)(Setting between 0.0 sec and 300 seconds is possible from the display panel.)
Cooling system
Self-cooling for 75A unit or smaller
Air-cooling for 100A unit or larger
Warning Major failure relay
Operates in the event of overcurrent, abnormal temperature, fuse disconoutput
nection, Thyristor open/short, and load short.
functionContact output: 1a contact (AC250V 1A)

Minor failure relay

Function to limit current
Detection of
instantaneous power failure
Dielectric strength
Insulation resistanceWarning indication : The light-emitting diode of OCR, TMP, or F lights up,
and the same of THY or LOD flickers.
Operates in the event of power supply undervoltage, abnormal frequency, load open, and heater disconnection.
Contact output: 1a contact (AC250V 1A)
Warning indication : The light- emitting diode of HET lights up, and thesame of L.Vo, FRQ, or LOD flickers.
Setting between 50% and 110% of rated current is possible.
Detects power failure (half cycle or more) and turns off output.
Restarts output in the soft-start mode after power is recovered.
AC2000V for 1 minute (for 200/220/254V type)AC2500V for 1 minute (for 380/400/440/460/480V type)
20M or more (by DC500V)

22

-MEMO-Head Office
3-1-56 Nishiawaji,Higashiyodogawa-ku,Osaka
533-0031,Japan
Tel: 06-6325-0500 Fax: 06-6321-0355
http://www.sansha.co.jp/
SANREX CORPORATION (U.S.A)
50Seaview Boulevard Port Washington,NY 11050-4618,
U.S.A
Tel: +1-516-625-1313 Fax: +1-516-625-8845
SANREX EUROPE GmbH (Germany)
Knorrstrasse 142, Munich D-80937,Germany.
Tel: +49-89-311-2034 Fax: +49-89-316-1636

SANREX ASIA PACIFIC PTE.LTD. (Singapore)
25,Tagore Lane,#04-02B Singapore Godown, 787602
Singapore
Tel: +65-6457-8867,+65-6459-6426 Fax: +65-6459-6425
FOSHAN CITY SHUNDE SANREX LIMITED (China)Dazhou Shiliang Road Lunjiao Town, Shunde District,Foshan City, Guandong Province 528308 P.R.China
Tel: +86-757-2733-3688 Fax: +86-757-2783-3547
SANSHA ELECTRIC MFG. (SHANGHAI) CO.,LTD(China)Room310,555 Building,555West Nanjing Road,
Shanghai 200041,P.R.China
Tel: +86-21-5868-1058 Fax: +86-21-5868-1056

SANREX LIMITED (Hong Kong)
Room 307,Kowloon Plaza,485 Castle Peak Rd.,
Kowloon,HongKong
Tel: +852-2744-1310,+852-2785-6313
Fax: +852-2785-6009

The specifications of this product described in this INSTRUCTION MANUAL may, incident
to any improvement in the product, be subject any change without prior notice.

K1A578200A

2010.10.20